Legg, J.    

Firstname:J. 
Surname:Legg 
Email:j.legg@cgiar.org 
Institute:IITA 
Homepage:http://www.iita.org 
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260 publications (0 read)





Publications as Author



2024

First report of the severe Uganda variant of East African cassava mosaic virus in Zambia, Tembo, M.*, Crespo-Bellido, A., Chikoti, P.*, Adediji, A. O.*, Mataa, M.*, Ntawuruhunga, P., Shirima, R. R., Legg, J. and Duffy, S., in: New Disease Reports, volume 49, number 1: e12260, pages 1-3, ISSN 2044-0588, 2024. [DOI]
 
Genetic diversity of whiteflies colonizing crops and their associated endosymbionts in three agroecological zones of Cameroon, Kepngop, L. R. K.*, Wosula, E. N., Amour, M., Ghomsi, P. G. T.*, Wakam, L. N.*, Kansci, G.* and Legg, J., in: Insects, volume 15, number 9: 657, pages 1-18, ISSN 2075-4450, 2024. [DOI]
 
Decision support for managing an invasive pathogen through efficient clean seed systems: Cassava mosaic disease in Southeast Asia, Onofre, K. F. A., Delaquis, E., Newby, J., de Haan, S., Le, T. C. T., Minato, N., Legg, J., Cuellar, W., Briseno, R. I. and Garrett, K. A., in: Biorxiv (Preprint), pages 1-43, 2024. [DOI]
 
Occurrence and distribution of major cassava pests and diseases in cultivated cassava varieties in western Kenya, Wosula, E. N., Shirima, R. R., Amour, M., Woyengo, V. W.*, Otunga, M.* and Legg, J., in: Viruses, volume 16, number 9: 1469, pages 1-22, ISSN 1999-4915, 2024. [DOI]
 
Early detection of plant virus infection using multispectral imaging and machine learning, Grieve, B., Duffy, S., Dallas, M. M., Ascencio‑Ibanez, J. T., Alonso-Chavez, V., Legg, J., Hanley-Bowdoin, L. and Yin, H., in: Plant Health Cases, pages 1-11, ISSN 2959-880X, 2024. [DOI]
 
Waxing to prolong seed yam minituber viability: a manual, Balogun, M., Adepeju, M. A.*, Ossai, C., Aighewi, B., Legg, J. and Abberton, M., International Institute of Tropical Agriculture (IITA), 2024.
 
Scaling of digital extension tools (PlantVillage NURU app) for diagnosis of cassava Pests and Diseases, Wosula, E. N., Mbilinyi, N., Issa, K. A., Shirima, R. R. and Legg, J., 2024.
 
Comparing fresh root yield and quality of certified and farmer-saved cassava seed, Yabeja, J. W., Manoko, M. L. K.* and Legg, J., in: Crop Protection, volume 187, number -: 106932, pages 1-12, ISSN 0261-2194, 2024. [DOI]
 

2023

Efficacy of selected botanical oils against the cassava whitefly (Bemisia tabaci) and their effects on its feeding behaviour, Amour, M., Wosula, E. N., Mrisho, L., Hoskins, C., Buss, D., Bruce, T., Stephano, F.* and Legg, J., in: Journal of Applied Entomology, volume 147, number 7, pages 473-485, ISSN 0931-2048, 2023. [DOI]
 
Influence of altitude as a proxy for temperature on key Musa pests and diseases in watershed areas of Burundi and Rwanda, Nakato, V., Okonya, J., Kantungeko, D., Ocimati, W., Mahuku, G., Legg, J. and Blomme, G., in: Heliyon, volume 9, number 3: e13854, pages 1-12, ISSN 2405-8440, 2023. [DOI]
 
A global assessment of the state of plant health, Ortega-Beltran, A., Kumar, P. L., Menkir, A., Bandyopadhyay, R., Mahuku, G., Legg, J., Fiaboe, K. and Tripathi, L., in: Plant Disease, pages 1-88, ISSN 0191-2917, 2023. [DOI]
 
Cutting dipping application of Flupyradifurone against cassava whiteflies Bemisia tabaci and impact on its parasitism in cassava, Caspary, R., Wosula, E. N., Issa, K. A., Amour, M. and Legg, J., in: Insects, volume 14, number -: 796, pages 1-15, ISSN 2075-4450, 2023. [DOI]
 

2022

Epidemiological analysis of Cassava Mosaic and Brown Streak Diseases, and Bemisia tabaci in the Comoros Islands, Shirima, R. R., Wosula, E. N., Hamza, A. A.*, Mohammed, N. A.*, Mouigni, H.*, Nouhou, S.*, Mchinda, N. M.*, Ceasar, G., Amour, R., Njukwe, E.* and Legg, J., in: Viruses, volume 14, number 10: 2165, pages 1-18, ISSN 1999-4915, 2022. [DOI]
 
Diversity and distribution of whiteflies colonizing cassava in eastern Democratic Republic of Congo, Casinga, C. M., Wosula, E. N., Sikirou, M., Shirima, R. R., Munyerenkana, C. M., Nabahungu, N. L., Bashizi, K. B., Ugentho, H.*, Monde, G.* and Legg, J., in: Insects, volume 13, number 9: 849, pages 1-12, ISSN 2075-4450, 2022. [DOI]
 
Innovative digital technologies to monitor and control pest and disease threats in Root, Tuber, and Banana (RT&B) cropping systems: progress and prospects, Kreuze, J., Adewopo, J., Selvaraj, M., Mwanzia, L., Kumar, P. L., Cuellar, W., Legg, J., Hughes, D. P. and Blomme, G., pages 261-288, chapter 9, Springer, ISBN 978-3-030-92021-0, 2022. [DOI]
 
Early detection of plant virus infection using multispectral imaging and spatial-spectral machine learning, Peng, P., Dallas, M. M., Ascencio‑Ibanez, J. T., Hoyer, J. S., Legg, J., Hanley‑Bowdoin, L., Grieve, B. and Yin, H., in: Scientific Reports, volume 12, number -: 3113, pages 1-14, ISSN 2045-2322, 2022. [DOI]
 
Evaluation of the efficacy of Flupyradifurone against Bemisia tabaci on cassava in Tanzania, Issa, K. A., Wosula, E. N., Stephano, F.* and Legg, J., in: Insects, volume 13, number 10: 920, pages 1-18, ISSN 2075-4450, 2022. [DOI]
 
Commercially sustainable cassava seed systems in Africa, Legg, J., Diebiru-Ojo, E. M., Eagle, D., Friedmann, M., Kanju, E., Kapinga, R., Kumar, P. L., Lateef, S., Magige, S.*, Mtunda, K.*, Yabeja, J. W. and Nitturkar, H., pages 453-482, chapter 15, Springer, ISBN 978-3-030-92021-0, 2022. [DOI]
 

2021

Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo, Casinga, C. M., Shirima, R. R., Mahungu, N., Tata-Hangy, W., Bashizi, K. B., Munyerenkana, C. M., Ughento, H.*, Enene, J., Sikirou, M., Dhed'a, D. B.*, Monde, G.*, Kumar, P. L. and Legg, J., in: Plant Disease, volume 105, number 8, pages 2177-2188, ISSN 0191-2917, 2021. [DOI]
 
Harnessing nature-based solutions for smallholder plant health in a changing climate, Egan, P. A., Chikoye, D., Green, K., Tamo, M., Feit, B., Kumar, P. L., Bandyopadhyay, R., Tepa-Yotto, G., Ortega-Beltran, A., Saethre, M. G., Coyne, D., Legg, J. and Jonsson, M., Booklet, 2021.
 
Production characteristics and strategies for adapting to the impacts of climate change on cassava whiteflies and viruses in Tanzania, Aregbesola, O. Z., Uzokwe, V. N. E., Adeloye, K. A.*, Rapisarda, C., Lund, O., Sigsgaard, L. and Legg, J., in: Vietnam Journal of Agricultural Sciences, volume 4, number 1, pages 921-935, ISSN 2588-1299, 2021. [DOI]
 
Plant pest surveillance: from satellites to molecules, Silva, G., Tomlinson, J., Onkokesung, N., Sommer, S., Mrisho, L., Legg, J., Adams, I. P., Gutierrez-Vazquez, Y., Howard, T. P., Laverick, A., Hossain, O., Wei, Q., Gold, K. M. and Boonham, N., in: Emerging Topics in Life Sciences, volume 5, number 2, pages 275-287, ISSN 2397-8554, 2021. [DOI]
 
Influence of olfaction in host-selection behavior of the cassava whitefly Bemisia tabaci, Mrisho, L., Maeda, D. G.*, Ortiz, Z. M., Ghanavi, H. R., Legg, J. and Stensmyr, M., in: Frontiers in Ecology and Evolution, volume 9, number : 775778, pages 1-13, ISSN 2296-701X, 2021. [DOI]
 

2020

Global cropland connectivity: a risk factor for invasion and saturation by emerging pathogens and pests, Xing, Y., Nopsa, J., Andersen, K. F., Andrade-Piedra, J., Beed, F., Blomme, G., Carvajal-Yepes, M., Coyne, D., Cuellar, W., Forbes, G., Kreuze, J., Kroschel, J., Kumar, P. L., Legg, J., Parker, M., Schulte-Geldermann, E., Sharma, K. and Garrett, K. A., in: BioScience, volume 70, number 9, pages 744-758, ISSN 0006-3568, 2020. [DOI]
 
Accuracy of a smartphone-based object detection model, PlantVillage Nuru, in identifying the foliar symptoms of the viral diseases of cassava-CMD and CBSD, Mrisho, L., Mbilinyi, N., Ndalahwa, M., Ramcharan, A., Kehs, A. K., McCloskey, P., Murithi, H ., Hughes, D. P. and Legg, J., in: Frontiers in Plant Science, volume 11, number : 590889, pages 1-14, ISSN 1664-462X, 2020. [DOI]
 
Plant resistance to geminiviruses, Patil, B. L.*, Chakraborty, S.*, Czosnek, H., Fiallo-Olive, E., Gilbertson, R., Legg, J., Mansoor, S., Navas-Castillo, J., Naqvi, R. Z.*, Rahman, S. U.* and Zerbini, F. M.*, pages 1-13, Elsevier, 2020. [DOI]
 
Genetic diversity of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) colonizing sweet potato and cassava in South Sudan, Misaka, B. C.*, Wosula, E. N., Marchelo-d'Ragga, P. W.*, Hvoslef-Eide, T. and Legg, J., in: Insects, volume 11, number 1: 58, pages 1-15, ISSN 2075-4450, 2020. [DOI]
 
KASP genotyping as a molecular tool for diagnosis of cassava-colonizing Bemisia tabaci, Wosula, E. N., Chen, W., Amour, M., Fei, Z. and Legg, J., in: Insects, volume 11, number 5: 305, pages 1-12, ISSN 2075-4450, 2020. [DOI]
 
Genetic diversity of mitochondrial DNA of bemisia tabaci (gennadius) (hemiptera: aleyrodidae) associated with cassava and the occurrence of cassava mosaic disease in Zambia, Chikoti, P.*, Tembo, M.*, Legg, J., Shirima, R. R., Mugerwa, H. and Sseruwagi, P.*, in: Insects, volume 11, pages 1-16, ISSN 2075-4450, 2020. [DOI]
 
Genotype by environment cultivar evaluation for cassava brown streak disease resistance in Tanzania, Shirima, R. R., Legg, J., Maeda, D. G.*, Tumwegamire, S., Mkamilo, G., Mtunda, K.*, Kulembeka, H.*, Ndyetabula, I.*, Kimata, B.*, Matondo, D. G.*, Ceasar, G., Mushi, E., Sichalwe, K.* and Kanju, E., in: Virus Research, volume 286, number -: 198017, pages 1-12, ISSN 0168-1702, 2020. [DOI]
 
Life history and temperature-dependence of cassava-colonising populations of Bemisia tabaci, Aregbesola, O. Z., Legg, J., Lund, O., Sigsgaard, L., Sporleder, M., Carhuapoma, P. and Rapisarda, C., in: Journal of Pest Science, pages 1225-1241, ISSN 1612-4758, 2020. [DOI]
 
Cassava Mosaic Viruses (Geminiviridae), Legg, J. and Winter, S., pages 1-12, Elsevier, 2020. [DOI]
 

2019

Genome of the African cassava whitefly Bemisia tabaci and distribution and genetic diversity of cassava-colonizing whiteflies in Africa, Chen, W., Wosula, E. N., Hasegawa, D. K., Casinga, C. M., Shirima, R. R., Fiaboe, K., Hanna, R., Fotso Kuate, A., Goergen, G ., Tamo, M., Mahuku, G., Murithi, H., Tripathi, L., Mware, B., Kumar, P. L., Ntawuruhunga, P., Moyo, C., Yomeni, M. O., Boahen, S., Edet, M., Awoyale, W., Wintermantel, W. M., Ling, K., Legg, J. and Fei, Z., in: Insect Biochemistry and Molecular Biology, volume 110, pages 112-120, ISSN 0965-1748, 2019. [DOI]
 
Assessing the degeneration of cassava under high-virus inoculum conditions in coastal Tanzania, Shirima, R. R., Maeda, D. G.*, Kanju, E., Tumwegamire, S., Ceasar, G., Mushi, E., Sichalwe, C.*, Mtunda, K.*, Mkamilo, G.* and Legg, J., in: Plant Disease, volume 103, number 10, pages 2652-2664, ISSN 0191-2917, 2019. [DOI]
 
The role of women in production and management of RTB crops in Rwanda and Burundi: Do men decide and women work?, Okonya, J., Mudege, N. N., Rietveld, A., Nduwayezu, A.*, Kantungeko, D., Hakizimana, B. M.*, Nyaga, J.*, Blomme, G., Legg, J. and Kroschel, J., in: Sustainability, volume 11, number -: 4304, pages 1-15, ISSN 2071-1050, 2019. [DOI]
 
A global surveillance system for crop diseases: global preparedness minimizes the risk to food supplies, Carvajal-Yepes, M., Cardwell, K., Nelson, A., Garrett, K. A., Giovani, B., Saunders, D. G. O., Kamoun, S., Legg, J., Verdier, V., Lessel, J., Neher, R. A., Day, R. S., Day, R., Pardey, P., Gullino, M. L., Records, A. R., Bextine, B., Leach, J. E., Staiger, S. and Tohme, J., in: Science, volume 364, number 6447, pages 1237-1239, ISSN 0036-8075, 2019. [DOI]
 
Farmer reported pest and disease impacts on root, tuber and banana crops and livelihoods in Rwanda and Burundi, Okonya, J., Ocimati, W., Nduwayezu, A.*, Kantungeko, D., Niko, N.*, Blomme, G., Legg, J. and Kroschel, J., in: Sustainability, volume 11, number -: 1592, pages 1-20, ISSN 2071-1050, 2019. [DOI]
 
Pesticide use practices in root, tuber, and banana crops by smallholder farmers in Rwanda and Burundi, Okonya, J., Petsakos, A., Suarez, V., Nduwayezu, A.*, Kantungeko, D., Blomme, G., Legg, J. and Kroschel, J., in: International Journal of Environmental Research and Public Health, volume 16, number -: 400, pages 1-18, ISSN 1661-7827, 2019. [DOI]
 
A mobile-based deep learning model for cassava disease diagnosis, Ramcharan, A., McCloskey, P., Baranowski, K., Mbilinyi, N., Mrisho, L., Ndalahwa, M., Legg, J. and Hughes, D. P., in: Frontiers in Plant Science, volume 10, number -: 272, pages 1-8, ISSN 1664-462X, 2019. [DOI]
 
A method for generating virus-free cassava plants to combat viral disease epidemics in Africa, Maruthi, M. N., Whitfield, E. C., Otti, G., Tumwegamire, S., Kanju, E., Legg, J., Mkamilo, G.*, Kawuki, R.*, Benesi, I.*, Zacarias, A.*, Munga, T.*, Mwatuni, F.* and Mbugua, E.*, in: Physiological and Molecular Plant Pathology, volume 105, pages 77-87, ISSN 0885-5765, 2019. [DOI]
 
Impact of host plant species and whitefly species on feeding behavior of Bemisia tabaci, Milenovic, M., Wosula, E. N., Rapisarda, C. and Legg, J., in: Frontiers in Plant Science, volume 10, number 1, pages 1-14, ISSN 1664-462X, 2019. [DOI]
 
First report of mixed infection of cassava brown streak virus and Ugandan cassava brown streak virus on cassava in north-eastern Democratic Republic of Congo, Casinga, C. M., Monde, G.*, Shirima, R. R. and Legg, J., in: Plant Disease, volume 103, number 1, pages 166, ISSN 0191-2917, 2019. [DOI]
 
Potential impact of climate change on whiteflies and implications for the spread of vectored viruses, Aregbesola, O. Z., Legg, J., Sigsgaard, L., Lund, O. and Rapisarda, C., in: Journal of Pest Science, volume 92, number 2, pages 381-392, ISSN 1612-4758, 2019. [DOI]
 
Disease surveillance, diagnostics and germplasm health in crop protection, Kumar, P. L., Legg, J., Ayodele, M., Mahuku, G., Ortega-Beltran, A. and Bandyopadhyay, R., Burleigh Dodds series in Agricultural Science, pages 41-73, chapter 3, Burleigh Dodds Science Publishing Limited, ISBN 978-1-78-676232-0, 2019.
 
Viruses affecting African crops and their vectors, Legg, J., Kumar, P. L., Mahuku, G., Wosula, E. N., Stavolone, L., Terry, E. and Bosque-Perez, N., Burleigh Dodds series in Agricultural Science, pages 95-134, chapter 5, Burleigh Dodds Science Publishing Limited, ISBN 978-1-78-676232-0, 2019. [DOI]
 

2018

World management of geminiviruses, Rojas, M. R., Macedo, M. A., Maliano, M. R., Soto-Aguilar, M., Souza, J.O., Briddon, R. W., Kenyon, L., Bustamante, R. F., Zerbini, F. M.*, Adkins, S., Legg, J., Kvarnheden, A., Wintermantel, W. M., Sudarshana, M. R., Peterschmitt, M., Lapidot, M., Martin, D. P.*, Moriones, E., Inoue-Nagata, A. K.* and Gilbertson, R., in: Annual Review of Phytopathology, volume 56, pages 637-677, ISSN 0066-4286, 2018. [DOI]
 
First report and preliminary evaluations of cassava brown streak-like root necrosis in Congo Republic, Bakelana, T.*, Musben, Z.*, Boykin, L. M., Pita, J., Amand, M.*, Monde, G.*, Mahungu, N., Legg, J., Mpika.*, , Munseki, L.* and Kanana, T.*, in: International Journal of Development Research, volume 8, number 8, pages 22400-22407, ISSN 2230-9926, 2018.
 
Two new invasive whiteflies (Hemiptera: Aleyrodidae) to Tanzania, Wosula, E. N., Evans, G., Issa, K. A. and Legg, J., in: African Entomology, volume 26, number 1, pages 259-264, ISSN 1021-3589, 2018. [DOI]
 
Exchanging and managing in-vitro elite germplasm to combat Cassava Brown Streak Disease (CBSD) and Cassava Mosaic Disease (CMD) in eastern and southern Africa, Tumwegamire, S., Kanju, E., Legg, J., Shirima, R. R., Kombo, S., Mkamilo, G.*, Mtunda, K.*, Sichalwe, K.*, Kulembeka, H.*, Ndyetabula, I.*, Saleh, H.*, Kawuki, R.*, Alicai, T.*, Adiga, G.*, Benesi, I.*, Mhone, A.*, Zacarias, A.*, Matsimbe, S. F.*, Munga, T.*, Ateka, E.*, Navangi, L.*, Maruthi, M. N., Mwatuni, F.*, Ngundo, G.*, Mwamgangi, M.*, Mbugua, E.*, Ndunguru, J.*, Rajabu, C.* and Mark, D.*, in: Food Security, volume 10, number 2, pages 351-368, ISSN 1876-4517, 2018. [DOI]
 

2017

A risk assessment framework for seed degeneration: informing an integrated seed health strategy for vegetatively-propagated crops, Thomas-Sharma, S., Andrade-Piedra, J., Carvajal-Yepes, M., Nopsa, J., Jeger, M. J., Jones, R., Kromann, P., Legg, J., Yuen, J., Forbes, G. and Garrett, K. A., in: Phytopathology, volume 107, number 10, pages 1123-1135, ISSN 0031-949X, 2017. [DOI]
 
Spatial analysis of temporal changes in the pandemic of severe Cassava Mosaic Disease in northwestern Tanzania, Szyniszewska, A. M., Busungu, C., Boni, S. B.*, Shirima, R. R., Bouwmeester, H. and Legg, J., in: Phytopathology, volume 107, number 10, pages 1229-1242, ISSN 0031-949X, 2017. [DOI]
 
Absolute quantification of cassava brown streak virus mRNA by real-time qPCR, Shirima, R. R., Maeda, D. G.*, Kanju, E., Ceasar, G., Tibazarwa, F. I.* and Legg, J., in: Journal of Virological Methods, volume 245, pages 5-13, ISSN 0166-0934, 2017. [DOI]
 
Genetic diversity of Bemisia tabaci species colonizing cassava in Central African Republic characterized by analysis of cytochrome c oxidase subunit I, Tocko-Marabena, B. K., Silla, S., Simiand, C., Zinga, I., Legg, J., Reynaud, B. and Delatte, H., in: PLoS ONE, volume 12, number 8(e0182749), pages 1-16, ISSN 1932-6203, 2017. [DOI]
 
Interactions between cassava mosaic geminiviruses and their vector, Bemisia tabaci (Hemiptera: aleyrodidae), Boni, S., Rugumamu, C. P.*, Gerling, D., Nokoe, K.* and Legg, J., in: Journal of Economic Entomology, volume 110, number 3, pages 884-892, ISSN 0022-0493, 2017. [DOI]
 
Deep learning for image-based cassava disease detection, Ramcharan, A., Baranowski, K., McCloskey, P., Ahmed, B., Legg, J. and Hughes, D. P., in: Frontiers in Plant Science, volume 8, number 1852, pages 1-7, ISSN 1664-462X, 2017. [DOI]
 
The role of the whitefly, Bemisia tabaci (Gennadius), and farmer practices in the spread of cassava brown streak ipomoviruses, Maruthi, M. N., Jeremiah, S. C.*, Mohammed, I. U. and Legg, J., in: Journal of Phytopathology, pages 1-11, ISSN 0931-1785, 2017. [DOI]
 
Unravelling the genetic diversity among cassava Bemisia tabaci whiteflies using nextRAD sequencing, Wosula, E. N., Chen, W., Fei, Z. and Legg, J., in: Genome Biology and Evolution, volume 9, number 1, pages 2958-2973, ISSN 1759-6653, 2017. [DOI]
 
Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia, Tembo, M.*, Mataa, M.*, Legg, J., Chikoti, P.* and Ntawuruhunga, P., in: Journal of Plant Pathology, volume 99, number 3, pages 1-28, ISSN 1125-4653, 2017. [DOI]
 
Integrated pest management of root and tuber crops in the tropics, Legg, J., Okonya, J. and Coyne, D., pages 90-112, chapter 7, CABI International, ISBN 978-1-78064-800-2, 2017.
 
Community phytosanitation to manage cassava brown streak disease, Legg, J., Ndalahwa, M., Yabeja, J. W., Ndyetabula, I.*, Bouwmeester, H., Shirima, R. R. and Mtunda, K.*, in: Virus Research, pages 1-18, ISSN 0168-1702, 2017. [DOI]
 

2016

Analysis of interactions between cassava brown streak disease symptom types facilitates the determination of varietal responses and yield losses, Ndyetabula, I.*, Merumba, S.*, Jeremiah, S. C.*, Kasele, S.*, Mkamilo, G.*, Kagimbo, F. M.* and Legg, J., in: Plant Disease, volume 100, number 7, pages 1388-1396, ISSN 0191-2917, 2016. [DOI]
 
Two novel DNAs that enhance symptoms and overcome CMD2 resistance to cassava mosaic disease, Ndunguru, J.*, De Leon, L., Doyle, C. D., Sseruwagi, P.*, Plata, G., Legg, J., Thompson, G.*, Tohme, J., Aveling, T.*, Ascencio-Ibanez, J. T. and Hanley-Bowdoin, L., in: Journal of Virology, volume 90, number 8, pages 4160-4173, ISSN 0022-538X, 2016. [DOI]
 
Ipomoviruses, Webb, S. E., Adkins, S., Maruthi, M. N. and Legg, J., pages 435-440, chapter 31, The American Phytopathological Society (APS), ISBN 978-0-89054-535-5, 2016. [DOI]
 
Survey, molecular detection and characterization of geminiviruses associated with cassava mosaic disease in Zambia, Mulenga, R.*, Legg, J., Ndunguru, J.*, Miano, D.*, Mutitu, E. W.*, Chikoti, P.* and Alabi, O., in: Plant Disease, volume 100, number 7, pages 1379-1387, ISSN 0191-2917, 2016. [DOI]
 

2015

The dynamics and environmental influence on interactions between cassava brown streak disease and the Whitefly, Bemisia tabaci, Jeremiah, S.*, Ndyetabula, I.*, Mkamilo, G.*, Haji, S.*, Muhanna, M.*, Chuwa, C.*, Kasele, S.*, Bouwmeester, H., Ijumba, J. N.* and Legg, J., in: Phytopathology, volume 105, number 5, pages 646-655, ISSN 0031-949X, 2015. [DOI]
 
Abundance, diversity and geographic distribution of cassava mosaic disease pandemic-associated Bemisia tabaci in Tanzania, Tajebe, L., Boni, S. B.*, Guastella, D., Cavalieri, V., Lund, O., Rugumamu, C. P.*, Rapisarda, C. and Legg, J., in: Journal of Applied Entomology, volume 139, number 8, pages 627-637, ISSN 0931-2048, 2015. [DOI]
 
Diversity of symbiotic bacteria associated with Bemisia tabaci (Homoptera: Aleyrodidae) in cassava mosaic disease pandemic areas of Tanzania, Tajebe, L., Guastella, D., Cavalieri, V., Kelly, S., Hunter, M., Lund, O., Legg, J. and Rapisarda, C., in: Annals of Applied Biology, volume 166, number 2, pages 297-310, ISSN 0003-4746, 2015. [DOI]
 
First Report of East African cassava mosaic Malawi virus in Plants Affected by Cassava Mosaic Disease in Zambia, Mulenga, R.*, Miano, D.*, Chikoti, P.*, Ndunguru, J.*, Legg, J. and Alabi, O., in: Plant Disease, volume 99, number 9, pages 1290, ISSN 0191-2917, 2015. [DOI]
 
Diversity, distribution and effects on cassava cultivars of Cassava Brown Streak Viruses in Malawi, Mbewe, W.*, Kumar, P. L., Changadeya, W.*, Ntawuruhunga, P. and Legg, J., in: Journal of Phytopathology, volume 163, number 6, pages 433-443, ISSN 0931-1785, 2015. [DOI]
 
Control of immature Bemisia tabaci stages by natural enemies on cassava in Eastern DR Congo, Musafiri, P., Hauser, S., Lema, A.* and Legg, J., Abstract, p. 192 in the book of abstracts of the Tropentag 2015: management of land use systems for enhanced food security - conflicts, controversies and resolutions, in Humboldt-Universitat Berlin, Germany, September 16 - 18, 2015.
 
Cassava mosaic, Alabi, O., Mulenga, R.* and Legg, J., CABI Plant Protection Series, pages 56-72, chapter 5, CABI Wallingford, ISBN 978-1-78064-426-4, 2015. [DOI]
 
Cassava brown streak disease: a threat to food security in Africa, Patil, B. L.*, Legg, J., Kanju, E. and Fauquet, C., in: Journal of General Virology, volume 96, pages 956-968, ISSN 0022-1317, 2015. [DOI]
 
Cassava virus diseases: biology, epidemiology, and management, Legg, J., Kumar, P. L., Makeshkumar, T.*, Tripathi, L., Ferguson, M., Kanju, E., Ntawuruhunga, P. and Cuellar, W., in: Advances in Virus Research, volume 91, pages 85-142, ISSN 0065-3527, 2015. [DOI]
 
Cassava brown streak, Legg, J., Kumar, P. L. and Kanju, E., CABI Plant Protection Series, pages 42-55, chapter 4, CABI Wallingford, ISBN 978-1-78064-426-4, 2015. [DOI]
 

2014

Global cropland connectivity as a risk factor for pathogen and pest invasion: the case of banana, cassava, potato, sweetpotato, and yam. Proceedings (Poster), APS-CPS Joint meeting. August 9-13, Minenepolis, Minnesota., Nopsa, J., Xing, Y., Andrade-Piedra, J., Beed, F., Blomme, G., Carvajal-Yepes, M., Forbes, G., Kreuze, J., Kroschel, J., Legg, J., Parker, M., Schulte-Geldermann, E., Kumar, P. L., Coyne, D. and Garrett, K. A., APS-CPS, 2014.
 
Management of RTB-critical pests and diseases under changing climates, through risk assessment, surveillance and modeling, 29-31 January, 2014, Kabale, Uganda, Kroschel, J., Okonya, H., Juarez, H.*, Forbes, G., Kreuze, J., Beed, F., Blomme, G. and Legg, J., 2014.
 
Survey on whiteflies and their parasitoids in cassava mosaic pandemic areas of Tanzania using morphological and molecular techniques, Guastella, D., Lulah, H., Tajebe, L., Cavalieri, V., Evans, G., Pedata, P. A., Rapisarda, C. and Legg, J., in: Pest Management Science, pages 1-43, ISSN 1526-498X, 2014. [DOI]
 
First record of Aleuroclava psidii (Singh) and Aleurotrachelus tuberculatus Singh (Hemiptera: Aleyrodidae) in East Africa, Guastella, D., Tajebe, L., Evans, G., Fovo, F., Rapisarda, C. and Legg, J., in: African Entomology, volume 22, number 2, pages 1-4, ISSN 1021-3589, 2014.
 
Virus-indexing, chemo- and thermo- therapies, and micro propagation for generating virus-free cassava plants: a labouratory manual, Maruthi, M. N., Whitfield, E. C., Kumar, P. L. and Legg, J., International Institute of Tropical Agriculture (IITA); Natural Resources Institute. University of Grenwich, 2014.
 
Management of whitefly-transmitted viruses in open-field production systems, Lapidot, M., Legg, J., Wintermantel, W. M. and Polston, J. E., in: Advances in Virus Research, volume 90, pages 147-206, ISSN 0065-3527, 2014. [DOI]
 
A global alliance declaring war on cassava viruses in Africa, Legg, J., Somado, E. A., Barker, I., Beach, L., Ceballos, H., Cuellar, W., Elkhoury, W., Gerling, D., Helsen, J., Hershey, C., Jarvis, A., Kulakow, P., Kumar, P. L., Lorenzen, J.+, Lynam, J.*, McMahon, M., Maruthi, G., Miano, D.*, Mtunda, K.*, Ntawuruhunga, P., Okogbenin, E.*, Pezo, P.*, Terry, E., Thresh, M., Wadsworth, J., Walsh, S., Winter, S., Tohme, J. and Fauquet, C., in: Food Security, volume 6, pages 231-248, ISSN 1876-4517, 2014. [DOI]
 
Biology and management of Bemisia whitefly vectors of cassava virus pandemics in Africa, Legg, J., Shirima, R. R., Tajebe, L., Guastella, D., Boniface, S., Jeremiah, S.*, Nsami, E.*, Chikoti, P.* and Rapisarda, C., in: Pest Management Science, volume 70, number 10, pages 1446-1453, ISSN 1526-498X, 2014. [DOI]
 
Spatio-temporal patterns of genetic change amongst populations of cassava Bemisia tabaci whiteflies driving virus pandemics in east and central Africa, Legg, J., Sseruwagi, P.*, Boniface, S., Okao-Okuja, G.*, Shirima, R. R., Bigirimana, S.*, Gashaka, G.*, Herrmann, H-W., Jeremiah, S.*, Obiero, H.*, Ndyetabula, I.*, Tata-Hangy, W.*, Masembe, C.* and Brown, J., in: Virus Research, volume 186, pages 61-75, ISSN 0168-1702, 2014. [DOI]
 

2013

Cassava brown streak disease: the expanding pandemic, Shirima, R. R., Bigirimana, S.*, Gashaka, G.*, Tata-Hangy, K.*, Barumbanze, P.*, Ndayihanzamaso, P.*, Kanyange, M. C.*, Mutumwinka, M.*, Mukakanyana, C.*, Nyirahorana, C.*, Ntivuguruzwa, S.*, Sifa, A.*, Kazindu, J.*, Ndahimana, J.*, Umfuyisoni, J.*, Uwimana, J.*, Ughento, H.*, Musungayi, E.*, Swai, D., Obiero, H.*, Njaro, I.*, Akhwale, M., Otunga, M.*, Mpapale, J.* and Legg, J., Abstract, P. 131 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Occurrence of cassava brown streak disease and associated Ugandan cassava brown streak virus in Rwanda in 2012 (ABSTRACT), Gashaka, G.*, Shirima, R. R., Kanyange, M. C.*, Mutumwinka, M.*, Mukakanyana, C.*, Nyirahorana, C.*, Uwimana, J.*, Ntivuguruzwa, S.*, Sifa, A.*, Kazindu, J.*, Ndahimana, J.*, Umfuyisoni, J.* and Legg, J., Abstract in Rwanda Agricultural Board Conference on Agriculture and Extension, August 21-23, Kigali, Rwanda, 2013.
 
Virus threats to cassava and yam in sub-Saharan Africa: new insights on controlling old nemesis (ABSTRACT), Kumar, P. L., Hanna, R., Seal, S., Nkere, C., Maruthi, M. N., Kulakow, P., Lopez-Montes, A., Gueye, B., Abberton, M. and Legg, J., Abstract in papers of the International Confernece on Tropical Roots and Tubers for Sustainable Livelihood under changing agro-climate (ICTRT) 9-12 July, Hotel Mascot, Thiruvananthapuram, Kerala, 2013.
 
Prevalence of cassava viral diseases in different agro-ecological zones in the western part of Democratic Republic of Congo (ABSTRACT), Bakelana, T.*, Harvey, J., Calvert, L.*, Purdie, L.*, Skilton, R.*, Holton, T.*, Magembe, E.*, Macharia, M.*, Legg, J., Mahungu, N., Tata-Hangy, K., Lutete, D. and Kanana, T.*, Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Cassava brown streak disease pandemic and the genetic characteristics of Bemisia tabaci in East and Central Africa, Shirima, R. R., Gashaka, G.*, Swai, D., Kombo, S., Tata-Hangy, W., Bigirimana, S.* and Legg, J., Abstract in 1st International Whitefly symposium, 20-24 May 2013, Kolymbari, Crete, 2013.
 
Managing the spread of cassava viruses through clean 'seed' systems (ABSTRACT), Hermence, C., Mtunda, K.*, Muhanna, M.*, Boniface, S., Jeremiah, S.*, Kanju, E. and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Assessment of tomato and pepper pests and diseases in coastal areas of Tanzania. Proceedings of the 11th African Crop Science Society Conference, 14 - 17 October 2013, Entebbe Uganda, Mtei, M., Coyne, D., Beed, F., Luambano, N.*, Maganga, M., Shirima, R. R. and Legg, J., African Crop Science Society (ACSS), 2013.
 
Diversity and geographic distribution of Bemisia tabaci (Homoptera: Aleyrodidae) associated with cassava in CMD pandemic areas of Tanzania (ABSTRACT), Tajebe, L., Guastella, D., Cavalieri, V., Lund, O., Rapisarda, C. and Legg, J., Abstract in 1st International Whitefly Symposium, 20-24 May 2013, Kolymbari, Crete, 2013.
 
Diversity of symbiotic bacteria associated with Bemisia tabaci (Homoptera:Aleyrodidae) in Tanzania, Tajebe, L., Guastella, D., Cavalieri, V., Kelly, S., Hunter, M., Legg, J., Lund, O. and Rapisarda, C., Abstract in 1st International Whitefly Smposium, 20-24 May 2013, Kolymbari, Crete, 2013.
 
Novel stractegies for managing Whiteflies on cassava: assessment of indigenous parasitoid fauna in Tanzania, Lulah, H., Guastella, D., Boniface, S., Gerling, D. and Legg, J., Abstract in 1st International Whitefly Symposium 20-24 May 2013, Kolymbari, Crete, 2013.
 
Effect of cassava brown streak disease on predominant cassava varieties in Malawi, Kamowa-Mbewe, W., Kumar, P. L., Changadeya, W.*, Ntawuruhunga, P. and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Clean seed systems: an intervention for the management of cassava virus diseases in sub-Saharan Africa (ABSTRACT), Yabeja, J. W., Mtunda, K.*, Shirima, R. R., Kanju, E. and Legg, J., Abstract in the book of abstracts and programme of the 12th Triennial Symposium of International Society for Tropical Root Crops-Africa Branch (ISTRC-AB), 30 - 5, October, Alisa Hotel, Accra, Ghana, 2013.
 
Can we maintain cassava clean seed systems using certification guidelines that incorporate virus testing? A comparison of standard and real-time PCR testing techniques, Shirima, R. R., Fovo, F., Yabeja, J. W. and Legg, J., Abstract, P. 295 in the book of abstracts and programme of the 12th Triennial Symposium of International Society for Tropical Root Crops-Africa Branch (ISTRC-AB), 30 - 5, October, Alisa Hotel, Accra, Ghana, 2013.
 
The prevalence of Cassava Mosaic Begomoviruses in Malawi (ABSTRACT), Changadeya, W.*, Kamowa-Mbewe, W., Kumar, P. L., Legg, J. and Ntawuruhunga, P., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Transmission of cassava brown streak viruses by Bemisia tabaci whiteflies (ABSTRACT), Jeremiah, S.*, Maruthi, M. N., Ijumba, J. N.* and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Field epidemiology of cassava brown streak viruses in Tanzania (ABSTRACT), Jeremiah, S. C., Maruthi, M. N., Ijumba, J. N.* and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Virus-vector transmission relationships for cassava brown streak viruses and the whitefly vector, Bemisia tabaci, Maruthi, M. N., Jeremiah, S.*, Mohammed, I. B. and Legg, J., Abstract, P. 48 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Assesment of pesticide use during vegetable production in costal areas of Tanzania. Proceedings of the 11th African Crop Science Society Conference, 14 - 17 October 2013, Entebbe Uganda, Mtei, M., Maganga, M., Beed, F., Legg, J., Shirima, R. R., Coyne, D. and Luambano, N.*, African Crop Science Society (ACSS), 2013.
 
Community Phytosanitation: progress in Cassava Brown Streak Control through clean seed, Mtunda, K.*, Ndyetabula, I.*, Legg, J., Ndunguru, J.*, Nwenisongole, A.*, Kaminyoge, F.*, Lwabuti, I.* and Shumbusho, E.*, Abstract, P. 272 in the book of abstracts and programme of the 12th Triennial Symposium of International Society for Tropical Root Crops-Africa Branch (ISTRC-AB), 30 - 5, October, Alisa Hotel, Accra, Ghana, 2013.
 
Characterizing the effects of degenerative diseases of cassava and yam, Kumar, P. L., Coyne, D. and Legg, J., Abstract, P. 298 in the book of abstracts and programme of the 12th Triennial Symposium of International Society for Tropical Root Crops-Africa Branch (ISTRC-AB), 30 - 5, October, Alisa Hotel, Accra, Ghana, 2013.
 
Population dynamics of cassava whiteflies (Bemisia tabaci, Homoptera: Aleyrodidae) and relative resistance and susceptibility of cassava accessions in western Democratic Republic of Congo, Bakelana, T.*, Munseki, L.*, Legg, J., Hauser, S. and Mahungu, N., Abstract in 1st International Whitefly Symposium, 20-24 May 2013, Kolymbari, Crete, 2013.
 
First report of super-abundant Bemisia tabaci on cassava in Zambia, Chikoti, P.*, Shirima, R. R. and Legg, J., Abstract, 1st International Whitefly Symposium, 20-24 May 2013, Kolymbari, Crete, 2013.
 
Assessment of Bemisia tabaci biotypes along an altitudinal gradient in Sicily and new plant host records for biotype T, Guastella, D., Cavalieri, V., Legg, J. and Rapisarda, C., Abstract in 1st International Whitefly Symposium, 20-24 May 2013, Kolymbari, Crete, 2013.
 
Comparative case studies of whitefly (Bemisia tabaci) vector-begomovirus diversity: associated effects on virus disease epidemiology in diverse study systems in Central America and sub-Saharan Africa (ABSTRACT), Brown, J., Palmieri, M. and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Epidemiological assessment of cassava mosaic disease in Central African Republic reveals the importance of mixed viral infection and poor health of plant cuttings, Zinga, I., Chiroleu, F., Legg, J., Lefeuvre, P., Komba, E., Semballa, S., Yandia, S. P., Mandakombo, N., Reynaud, B. and Lett, J., in: Crop Protection, volume 44, pages 6-12, ISSN 0261-2194, 2013. [DOI]
 
Multiplex RT-PCR assays for the simultaneous detection of cassava mosaic virus and cassava brown streak viruses, Maruthi, M. N., Musa, A., Legg, J., Kumar, P. L. and Hillocks, R. J., Abstract, P. 202 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Molecular diversity of tomato begomoviruses in Dar es Salaam, Tanzania (ABSTRACT), Shirima, R. R., Legg, J., Mtei, M., Maganga, M., Beed, F., Luambano, N.* and Coyne, D., Abstract, annual meeting of Association of Corporate Counsel (ACC'S) 27- 30 October, Los Angeles Convention Center Los Angeles, CA, 2013.
 
Community action in cassava brown streak disease control through clean seed, Mtunda, K.*, Legg, J., Ndyetabula, I.*, Jeremiah, S.*, Mvanda, K.*, Mutasingwa, G.* and Shumbusho, E.*, Abstract, P. 178 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 
Battling the Bemisia whitefly vectors of cassava virus pandemics in Africa: lessons from Thermopylae and Salamis, Legg, J., Lulah, H., Shirima, R. R., Sefera, L., Guastella, D., Simon, B., Jeremiah, S.*, Nsami, E.*, Sseruwagi, P.*, Hanna, R., Kumar, P. L., Mbewe, W.*, Chikoti, P.* and Rapisarda, C., Abstract in 1st International Whitefly Symposium, 20-24 May 2013, Kolymbari, Crete, 2013.
 
Progress in the development of clean seed systems for cassava, Legg, J., Yabeja, J. W., Shirima, R. R., Mtunda, K.*, Mwakitwange, F.*, Ndyetabula, I.*, Mkamilo, G.*, Magige, S.*, Good, L. and Kanju, E., Abstract, in the book of abstracts and programme of the 12th Triennial Symposium of International Society for Tropical Root Crops-Africa Branch (ISTRC-AB), 30 - 5, October, Alisa Hotel, Accra, Ghana, 2013.
 
Mapping the regional epidemiology of cassava viruses in east and central Africa, Legg, J., Bouwmeester, H., Shirima, R. R., Jeremiah, S.*, Ndyetabula, I.*, Obiero, H.*, Mkamilo, G.*, Bigirimana, S.*, Gashaka, G.*, Tata-Hangy, K.*, Okao-Okuja, G.*, Alicai, T.* and Kumar, P. L., Abstract, P. 127 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013.
 

2012

Cassava brown streak virus rapid assessment: Burundi, the Democratic Republic of Congo and Rwanda, Shirima, R. R., Bigirimana, S.*, Gashaka, G.*, Tata-Hangy, W.*, Barumbanze, P.*, Ndayihanzamaso, P.*, Mutumwinka, M.*, Kanyange, M. C.*, Mukakanyana, C., Nyirahorana, C., Uwimana, J.*, Ntivuguruzwa, S.*, Sifa, A.*, Kazindu, J.*, Ndahimana, J.*, Umfuyisoni, J.*, Ughento, H.*, Musungayi, E.* and Legg, J., Abstract, S05-02 in Program and Abstracts, second Scientific Conference of the Global Cassava Partnership for the 21st Century, GCP21-II, Speke Resort and Conference Centre, Kampala, Uganda, June 18 - 22, 2012.
 
First report of Ugandan cassava brown streak virus on cassava in Democratic Republic of Congo, Mulimbi, W.*, Phemba, X.*, Assumani, B.*, Kasereka, P.*, Muyisa, S.*, Ugentho, H.*, Reeder, R., Legg, J., Laurenson, L., Weekes, R. and Thom, F. E, in: New Disease Reports, volume 26, pages 11, ISSN 2044-0588, 2012. [DOI]
 
Risk assessment and modelling: IITA, Tamo, M., Beed, F., Goergen, G ., Hanna, R., Coyne, D., Van Asten, P. and Legg, J., Abstract, p. 33 in Program Book of Abstracts, Scientific Review and Planning Workshop: "Modelling climate impacts on pests and diseases", 10-14 December 2012 Lima, Peru, 2012.
 
Distribution and diversity of cassava brown streak viruses in Malawi, Kamowa-Mbewe, W., Kumar, P. L., Changadeya, W.*, Ntawuruhunga, P. and Legg, J., Abstract, SP05-11 in Program and Abstracts, Second Scientific Conference of the Global Cassava Partnership for the 21st Century (GCP21-II). June 18-22, Kampala, Uganda., 2012.
 
Multiplex RT-PCR assays for the simultaneous detection of both RNA and DNA viruses infecting cassava and the common occurrence of mixed infections by two cassava brown streak viruses in East Africa, Abarshi, M. M., Mohammed, I. B., Jeremiah, S. C., Legg, J., Kumar, P. L., Hillocks, R. J. and Maruthi, M. N., in: Journal of Virological Methods, volume 179, number 1, pages 176-184, ISSN 0166-0934, 2012. [DOI]
 
Economic damages of cassava brown streak disease in sub- Saharan Africa: a framework, Manyong, V., Maeda, C., Kanju, E. and Legg, J., in: Tropical Roots and Tuber Crops and the Challenges of Globalization and Climate Changes. Proceedings of the 11th triennial Symposium of the ISTRC-AB, 4 to 8 October 2010, pages 61-68, ISTRC-AB, Ibadan, Nigeria, 2012.
 
Comparison of disease patterns assessed by three independent surveys of cassava mosaic virus disease in Rwanda and Burundi, Bouwmeester, H., Heuvelink, G., Legg, J. and Stoorvogel, J., in: Plant Pathology, volume 61, number 2, pages 399-412, ISSN 0032-0862, 2012. [DOI]
 
Multiplex RT-PCR assays for the simultaneous detection of cassava mosaic virus and cassava brown streak viruses, Abarshi, M. M., Mohammed, I. B., Legg, J., Kumar, P. L., Hillocks, R. J. and Maruthi, M. N., Abstract, SP05-11 (SP05-06) in Program and Abstracts, Second Scientific Conference of the Global Cassava Partnership for the 21st Century (GCP21-II). June 18-22, 2012, Kampala, Uganda, 2012.
 
Yield losses attributed to cassava mosaic disease on major landrace cassava cultivars in Uganda. Proceedings (Poster) of the second Scientific Conference of the Global Cassava Partnership for the 21st Century, GCP21-II, Okao-Okuja, G.*, Obonyo, R. and Legg, J., Global Cassava Partnership for the 21st Century (GCP-21), 2012.
 
Yield losses attributed to cassava mosaic disease on major landrace cassava cultivars in Uganda, Okao-Okuja, G.*, Obonyo, R. and Legg, J., Abstract, SP02-17 in Program and Abstracts, second Scientific Conference of the Global Cassava Partnership for the 21st Century, GCP21-II, Speke Resort and Conference Centre, Kampala, Uganda, June 18 - 22, 2012.
 
Changing nature of CBSD and CMD in cassava farmers' fields in the Coastal lowlands of Tanzania, Jeremiah, S.*, Legg, J., Saleh, H.* and Muhana, M., Abstract, S11-04 in Program and Abstracts, second Scientific Conference of the Global Cassava Partnership for the 21st Century, GCP21-II, Speke Resort and Conference Centre, Kampala, Uganda, June 18 - 22, 2012.
 
Les facteurs determinant l'abondance du vecteur mouche blanche (Bemisia tabaci, Homoptera : Aleyrodidae) et les types des virus distribues sur le manioc en R.D. Congo, Bakelana, T.*, Legg, J., Munseki, L.*, Hauser, S. and Mahungu, N., in: Tropical Roots and Tuber Crops and the Challenges of Globalization and Climate Changes. Proceedings of the 11th triennial Symposium of the ISTRC-AB, 4 to 8 October 2010, pages 386-398, ISTRC-AB, Ibadan, Nigeria, 2012.
 
Pandemics of cassava virus diseases in Africa: developing appropriate management strategies, Legg, J., Shirima, R. R., Jeremiah, S.*, Boniface, S., Okao-Okuja, G., Maruthi, M. N., Kumar, P. L., Smith, J. and Peters, D.*, Abstract, SP05-11 (PS14) in Program and Abstracts, Second Scientific Conference of the Global Cassava Partnership for the 21st Century (GCP21-II). June 18-22, Kampala, Uganda., 2012.
 
Surveillance approaches for cassava viruses in East and Central Africa, Legg, J., Shirima, R. R., Jeremiah, S. C., Ndyetabula, I.*, Obiero, H.*, Mkamilo, G.*, Bigirimana, S.*, Gashaka, G.*, Tata-Hangy, W.*, Okao-Okuja, G., Obonyo, R., Bouwmeester, H. and Kumar, P. L., Abstract, SP05-11 (SP11-06) in Program and Abstracts, Second Scientific Conference of the Global Cassava Partnership for the 21st Century (GCP21-II). June 18-22, 2012, Kampala, Uganda, 2012.
 
Cassava Diseases: Ecology and Control, Legg, J., pages 2-6, Taylor and Francis, ISBN 0-8247-0632-3, 2012. [DOI]
 

2011

First report of cassava brown streak disease and associated Ugandan cassava brown streak virus in Burundi, Bigirimana, S.*, Barumbanze, P.*, Ndayihanzamaso, P.*, Shirima, R. R. and Legg, J., in: New Disease Reports, volume 24, pages 26, ISSN 2044-0588, 2011. [DOI]
 
Widespread occurrence and diversity of cassava brown streak virus (Potyviridae:Ipomovirus) in Tanzania, Rwegasira, G. M.*, Momanyi, G.*, Rey, M.E.C., Kahwa, G. and Legg, J., in: Phytopathology, volume 101, number 10, pages 1159-1167, ISSN 0031-949X, 2011.
 
Occurrence and distribution of cassava pests and diseases in Rwanda, Night, G., Asiimwe, P., Gashaka, G.*, Nkezabahizi, D.*, Legg, J., Okao-Okuja, G., Obonyo, R., Nyirahorana, C., Mukakanyana, C., Mukase, F.*, Munyabarenzi, I* and Mutumwinka, M.*, in: Agriculture, Ecosystems and Environment, volume 140, number 3 and 4, pages 492-497, ISSN 0167-8809, 2011.
 
Effectiveness of phytosanitation in cassava mosaic disease management in a postepidemic area of western Kenya, Mallowa, S.*, Isutsa, D.K.*, Kamau, A.W.* and Legg, J., in: ARPN Journal of Agricultural and Biological Science, volume 6, number 7, pages 8-15, ISSN 1990-6145, 2011.
 
DEWN: a novel surveillance system for cassava disease, Ndyetabula, I.* and Legg, J., in: R4D review, volume 6, pages 48-51, ISSN 2071-3681, 2011.
 
Comparing the regional epidemiology of the cassava mosaic and cassava brown streak virus pandemics in Afriica, Legg, J., Jeremiah, S.*, Obiero, H.*, Maruthi, M. N., Ndyetabula, I.*, Okao-Okuja, G., Bouwmeester, H., Bigirimana, S.*, Tata-Hangy, W.*, Gashaka, G.*, Mkamilo, G.*, Alicai, T.* and Kumar, P. L., in: Virus Research, volume 159, pages 161-170, ISSN 0168-1702, 2011.
 
Meeting the challenges of Cassava Brown Streak Disease (CBSD) in Malawi, Legg, J., Mbewe, M., Kumar, P. L., Ntawuruhunga, P., Changadeya, W.* and Moyo, C. C.*, in: Roots Newsletter, volume 13, number 1, pages 4, 2011.
 
Developing clean seed systems for cassava in East and Central Africa, Legg, J., in: R4D Review, volume 6, pages 41-45, ISSN 2071-3681, 2011.
 

2010

Recently released cassava varieties in the lake zone of Tanzania, Mkamilo, G.*, Ndyetabula, I.*, Jeremiah, S.*, Merumba, S.*, Kibura, J.*, Karugaba, R.*, Chirimi, B., Bagambisa, C.*, Milala, P.*, Chuwa, C.*, Ngendello, T.*, Legg, J., Kanju, E. and Ntawuruhunga, P., in: Roots Newsletter, volume 12, number 2, pages 11-12, 2010.
 
Inter-project linkages to create cassava enterprises for expanded markets and utilization, Ntawuruhunga, P., James, B., Okechukwu, R., Sanni, L., Sandifolo, V., Tarawali, G., Abass, A. and Legg, J., Abstract in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
Cassava brown streak disease: another threat to cassava production in the lake zone of Tanzania, Ndyetabula, I.*, Jeremiah, S.*, Mkamilo, G.*, Merumba, S.*, Chuwa, C.*, Kasele, I., Legg, J. and Bouwmeester, H., Abstract presented at the International Cassava Brown Streak Disease Workshop. Entebbe, Uganda, 5-7 May, 2010.
 
Single-tube-one-step multiplex-PCR method for simultaneous detection of Cassava Brown Streak Virus, African Cassava Mosaic Virus and East African Cassava Mosaic Virus in cassava, Kumar, P. L., Alabi, O., Akinbade, S., Maruthi, M. N., Kim, D., Naidu, R. and Legg, J., Abstract, 2010.
 
Development of improved RT-PCR protocols and sampling procedures for the reliable and cost-effective detection of Cassava Brown Streak Virus, Maruthi, M. N., Abarshi, M. M., Mohammed, I. B., Holt, J., Hillocks, R. J., Kumar, P. L. and Legg, J., Abstract presented at the International Cassava Brown Streak Disease Workshop: research achivements, challenges and potential for control. Entebbe, Uganda 5-7 May, 2010.
 
Cassava brown streak virus diversity and development of improved virus diagnostics, Maruthi, M. N., Abarshi, M. M., Seal, S., Hillocks, R. J., Kumar, P. L. and Legg, J., Abstract presented at PVEN-IPVEN Symposium, Plant viruses: exploiting agricultural and natural ecosystems, June 20-24, Cornell, Ithaca, New York, 2010.
 
Optimization of diagnostic RT-PCR protocols and sampling procedures for the reliable and cost-effective detection of Cassava brown streak virus, Abarshi, M. M., Mohammed, I. B., Wasswa, P., Hillocks, R. J., Holt, J., Legg, J., Seal, S. and Maruthi, M. N., in: Journal of Virological Methods, volume 163, pages 353-359, ISSN 0166-0934, 2010.
 
An appraisal of cowpea virus diseases in Malawi, Mozambique and Zambia, Kumar, P. L., Ogunsanya, P., Boahen, S., Tefera, H., Boukar, O., Legg, J., Coyne, D. and Tamo, M., Abstract (Poster) in Program and Book of Abstracts of the 5th World Cowpea Research Conference, held at Palm Beach Hotel, Saly, Senegal. 27 September - 1 October, 2010.
 
Economic damages of cassava brown streak disease in sub-Saharan Africa, Manyong, V., Maeda, C., Kanju, E. and Legg, J., Abstract (Oral presentation) in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
Economic damages of cassava brown streak disease in sub-Saharan Africa, Manyong, V., Maeda, C., Kanju, E. and Legg, J., Abstract (Oral presentation) in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
Etude de la dynamique des populations et criblage des accessions de manioc maintenues dans le germoplasme de lâ??INERA pour leur resistance a la mouche blanche (Bemisia tabaci, Homoptera : Aleyrodidae), Bakelana, T.*, Lema, K., Legg, J. and Mahungu, N., Abstract in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
Interactions between cassava green mite biocontrol and cassava mosaic disease management, Toko, M., Hanna, R., Legg, J., Kalyebi, A., Ogwang, J.* and Otema, M, Abstract (Poster) in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
The incidence of the cassava mosaic disease in relation with the source of planting materials and its impact on cassava production, Tata-Hangy, K.*, Legg, J., Lema, K., Hanna, R. and Luyindula, N.*, in: Root and tuber crops for poverty alleviation through science and technology for sustainable development: proceedings of the 10th Symposium of ISTRC-AB held from 8-12 October, 2007 in Maputo, Mozambique, pages 371-379, ISTRC-AB, 2010.
 
Le progrès enregistré dans la lute contre la mosaïque du manioc dans les provinces du Nord et Sud Kivu à l?Est de la République Démocratique du Congo, Tata-Hangy, K.*, Legg, J., Phemba, P., Ntawuruhunga, P., Lema, K., Mahungu, N., Bidiaka, S. and Walsh, S., Abstract (Oral presentation) in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
Biology and ecology of Bemisia tabaci: introduction, Naranjo, S.E. and Legg, J., pages 105-107, chapter Section II, Springer, ISBN 978-9048124596, 2010.
 
Contrasting role of putative whitefly vector on cassava mosaic and cassava brown streak virus transmission, Jeremiah, S.*, Legg, J. and Maruthi, M. N., Abstract presented at the Cassava Brown Streak Disease Workshop. Entebbe, Uganda 5-7 May, 2010.
 
Cassava disease survellance surveys 2009: mapping report, Tanzania, Bouwmeester, H., Legg, J., Ndyetabula, I.*, Jeremiah, S.* and Mkamilo, G.*, 2010.
 
Les facteurs determinant l'abondance du vecteur mouche blanche (Bemisia tabaci, Homoptera: Aleyrodidae) et les types des virus distribues sur le manioc en R.D. Congo, Bakelana, T.*, Legg, J., Lema, K., Hauser, S. and Mahungu, N., Abstract in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
A tale of two epidemics: the contrasting dynamics of cassava mosaic and cassava brown streak diseases in East Africa, Legg, J., Jeremiah, S.*, Obiero, H., Maruthi, M. N., Ndyetabula, I.*, Okao-Okuja, G., Kim, D., Bouwmeester, H., Bigirimana, S.*, Tata-Hangy, W., Gashaka, G.*, Mkamilo, G.*, Alicai, T.* and Kumar, P. L., Abstract: PVEN-IPVEN Symposium, on exploiting agricultural and natural ecosystems, June 20-24, Cornell, Ithaca, New York, 2010.
 
Epidemiology of a whitefly-transmitted cassava mosaic geminivirus pandemic in Africa, Legg, J., pages 233-257, chapter 7, Springer, ISBN 978-9048124596, 2010.
 
Cassava disease surveillance surveys 2009: mapping report, Legg, J., Bouwmeester, H., Bigirimana, S.*, Tata-Hangy, W., Obiero, H., Gashaka, G.*, Mkamilo, G.*, Ndyetabula, I.*, Jeremiah, S.* and Alicai, T.*, 2010.
 
Cassava virus disease survillence in sub-Saharan Africa, Legg, J., Kim, D., Maruthi, M. N., Bouwmeester, H., Okao-Okuja, G., Obonyo, R., Boniface, S., Jeremiah, S.*, Busungu, C., Ndyetabula, I.*, Legg, C. and Kumar, P. L., Abstract presented at the International Cassava Brown Streak Disease Workshop. Entebbe, Uganda 5-7 May, 2010.
 
The dual pandemic of cassava virus diseases in East and Central Africa: epidemiological perspectives, Legg, J., Jeremiah, S.*, Ndyetabula, I.*, Obiero, H., Mkamilo, G.*, Akhwale, M., Bouwmeester, H., Kim, D., Maruthi, M. N. and Kumar, P. L., Abstract, 2010.
 

2009

First report of the occurrence of East African cassava mosaic virus-Uganda (EACMV-UG) in Angola, Kumar, P. L., Akinbade, S., Dixon, A., Mahungu, N., Mutunda, M. P.*, Kiala, D.*, Londa, L.* and Legg, J., in: Plant Pathology, volume 58, number 2, pages 402, ISSN 0032-0862, 2009. [DOI]
 
Rapid single-step multiplex reverse transcription-PCR for the simultaneous detection of cassava brown streak virus, African cassava mosaic virus and East African cassava mosaic virus in cassava, Kumar, P. L., Alabi, O., Akinbade, S., Maruthi, M. N., Naidu, R. and Legg, J., 2009.
 
Cassava germplasm conservation, utilization and safe movement in Afirca, Kumar, P. L., Dumet, D., Ayodele, M. and Legg, J., 2009.
 
Laboratory manual for the diagnosis of cassava virus diseases, Kumar, P. L. and Legg, J., 2009.
 
GLCI Disease Objective: progress and prospective, Kumar, P. L., Legg, J., Ndunguru, J.*, Kanju, E., Ndyetabula, I.*, Maruthi, M. N., Bigirimana, S.*, Obiero, H., Gervais, G., Jeremiah, S.*, Tata-Hangy, W., Kemani, E., Kim, D. and Alicai, T.*, 2009.
 
Cassava virus disease surveillance in sub-Saharan Africa: proceedings (Poster), FAO CaCESCA project meeting, 30 November to 3 December, 2009, Dar es Salaam, Tanzania, Legg, J., Kim, D., Maruthi, M. N., Bouwmeester, H., Okao-Okuja, G., Obonyo, R., Boniface, S., Jeremiah, S.*, Busungu, C., Ndyetabula, I.*, Legg, C. and Kumar, P. L., 2009.
 
The cassava scourge, Legg, J., in: R4D Review, volume 3, pages 44-48, ISSN 2071-3681, 2009.
 

2008

Unleashing the power of cassava: new cassava varieties for Africa, Dixon, A., Mahungu, N., Ntawuruhunga, P., Kanju, E., Ssemakula, G., Gedil, M., Mba, C., Lokko, Y., Raji, A., Ingelbrecht, I., Legg, J., Kumar, P. L. and Winter, S., in: Global Cassava Partnership-First Scientific Meeting: Cassava Meeting the challenges of the New Millennium, 21 - 25 July, 2008, Ghent University, Ghent, Belgium, pages 102, 2008.
 
Cassava improvement in sub-Saharan Africa: contributions of IITA and its partners, Dixon, A., Okechukwu, R., Ssemakula, G., Hanna, R., Thresh, J. M., Hughes, J., Ingelbrecht, I., Fregene, M.*, Legg, J., Mahungu, N., Nweke, F., Ntawuruhunga, P., Fauquet, C., Manyong, V., Neuenschwander, P., Whyte, J., Wydra, K., Asiedu, R., Egesi, C. N.*, Bandyopadhyay, R., Winter, S., Tarawali, G., Bokanga, M., Ezedinma, C., Sanni, L., Ferguson, M., Ogbe, F., Akoroda, M., Maziya-Dixon, B., Ilona, P., Ekanayake, I. J., Ariyo, O., Onyeka, J.*, Otim-Nape, G.*, Dahniya, M. T., Ortiz, R., Hahn, S. K. and Hartmann, P., 2008.
 
First report of the occurrence of East African cassava mosaic virus-Uganda (EACMV-UG) in Angola, Kumar, P. L., Akinbade, S., Dixon, A., Mahungu, N., Mutunda, M. P.*, Kiala, D.*, Londa, L.* and Legg, J., in: New Disease Reports, volume 18, ISSN d000-1007, 2008.
 
Parasitism of Bemisia tabaci (Homoptera: aleyrodidae) by Eretmocerus mundus (Hymenoptera: aphelinidae) on cassava, Otim, M., Kyalo, G, Kyamanywa, S.*, Asiimwe, P., Legg, J., Guershon, M. and Gerling, D., in: International Journal of Tropical Insect Science, volume 28, number 3, pages 158-167, ISSN 1742-7584, 2008. [DOI]
 
Great lakes cassava initiative (GLCI), Boni, S. B.*, Biscoe, J. and Legg, J., 2008.
 
African cassava mosaic disease, Legg, J., pages 30-36, Elsevier, ISBN 978-0-12-374410-4, 2008. [DOI]
 
GLCI annual narrative progress report, Legg, J., 2008.
 
Great lake cassava initiative (GLCI) annual cassava disease and pest surveillance under the GLCI project, Legg, J., 2008.
 
Fifteen years of cassava virus epidemics in East and Central Africa, Legg, J., Okao-Okuja, G., Obonyo, R., Boni, S., Kumar, P. L., Dixon, A., Bigirimana, S.*, Tata-Hangy, K.*, Obiero, H., Gashaka, G.*, Jeremiah, S.*, Ndyetabula, I.* and Omongo, C. S.*, in: Global Cassava Partnership-First Scientific Meeting: Cassava Meeting the challenges of the New Millennium, 21 - 25 July, 2008, Ghent University, Ghent, Belgium, pages 140, 2008.
 

2007

Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Rwanda, Kanyange, M. C.*, Night, G., Nyirahorana, C., Mukakanyana, C., Gashaka, G.*, Okao-Okuja, G., Obonyo, R., Asiimwe, P. and Legg, J., 2007.
 
Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Uganda, Omongo, C. S.*, Poro, S., Omara, J., Omara, T.*, Okao-Okuja, G., Obonyo, R., Asiimwe, P. and Legg, J., 2007.
 
Cataloguing predators of Bemisia tabaci on a cassava mosaic disease resistant variety in Uganda, Asiimwe, P., Ecaat, J. S., Otim, M., Gerling, D., Guershon, M., Kyamanywa, S.* and Legg, J., in: Proceedings of 9th ISTRC-AB symposium, pages 570-573, Mombasa, Kenya, 2007.
 
Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Eastern Democratic Republic of Congo (Part 2), Tata-Hangy, K.*, Koffi-Tete, M., Obonyo, R., Okao-Okuja, G., Asiimwe, P. and Legg, J., 2007.
 
Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Eastern Democratic Republic of Congo (Part 1), Tata-Hangy, K.*, Koffi-Tete, M., Obonyo, R., Okao-Okuja, G., Asiimwe, P. and Legg, J., 2007.
 
Incidence and severity of cassava mosaic disease in the Republic of Congo, Ntawuruhunga, P., Okao-Okuja, G., Bembe, A., Obambi, M., Armand Mvila, J. and Legg, J., in: African Crop Science Journal, volume 15, number 1, pages 1-9, 2007.
 
Accelerated multiplication and distribution of improved healthy planting materials of Cassava varieties in Western Kenya, Odero, B. O., Obiero, H., Ndolo, P. J., Whyte, J., Legg, J., Malinga, J. and Magut, T., in: Proceedings of 9th ISTRC-AB symposium, pages 267-270, Mombasa, Kenya, 2007.
 
Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in the lake zone of Tanzania, Jeremiah, S.*, Ndyetabula, I.*, Boni, S. B.*, Shirima, R. R. and Legg, J., 2007.
 
Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Western Kenya, Obiero, H., Akhwale, M., Okao-Okuja, G., Asiimwe, P. and Legg, J., 2007.
 
Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Burundi, Bigirimana, S.*, Bizimana, S.*, Barumbanze, P.*, Busungu, C. and Legg, J., 2007.
 
Distribution, incidence and severity of Cassava diseases and pests in Mozambique, Toko, M., Hanna, R., Legg, J., Andrade, M., Jone, A., Agboton, B., Otema, M, Okao-Okuja, G., Obonyo, R. and Mambo, E., in: Proceedings of the 9th ISTRC-AB Symposium, pages 623-633, Mombasa, Kenya, 2007.
 
New spread of Cassava Brown streak virus disease and its implications for the movement of cassava germplasm in the east and central African region, Ntawuruhunga, P. and Legg, J., 2007.
 
Southern Sudan, Equatoria region, cassava baseline survey technical report, Ntawuruhunga, P., Legg, J., Okidi, J., Okao-Okuja, G., Tadu, G.* and Remington, T., International Institute of Tropical Agriculture (IITA), ISBN 978-131-323-4, 2007.
 
Incidence and distribution of cassava diseases and pests in the Democratic Republic of Congo, Tata-Hangy, K.*, Legg, J., Hanna, R., Toko, M., Lema, K., Dixon, A. and Mahungu, N., in: Proceedings of the 9th ISTRC-AB Symposium, pages 614-622, Mombasa, Kenya, 2007.
 
New spread of cassava brown streak virus disease and its implications for the movement of cassava germplasm in the East and Central African region, Ntawuruhunga, P. and Legg, J., 2007.
 

2006

Sustainable integrated management of whiteflies as vectors of viruses of cassava and sweetpotato: situation analysis of three farmers' groups in south eastern Nigeria, Okwusi, M.*, Ogbe, F., Nwauzor, E. C., Asumugha, G.*, Mbanasor, E.*, Akinpelu, A. O.*, Legg, J. and Emehute, J. K. U., in: Repositioning agriculture for sustainable millennium development goals in Nigeria: proceedings of the 40th annual conference of the Agricultural Society of Nigeria held at the National Root Crops Research Institute, Umudike, Abia State, 16-20 October, pages 232-234, Agricultural Society of Nigeria, 2006.
 
Current characteristics of cassava mosaic in postepidemic areas increase the range of possible management options, Mallowa, S.*, Isutsa, D., Kamau, A., Obonyo, R. and Legg, J., in: Annals of Applied Biology, volume 149, number 2, pages 137-144, ISSN 0003-4746, 2006.
 
Detection and identification of begomoviruses from landraces of okra (Abelmoschus esculentus) in Cameroon, Leke, W. N.*, Ramsell, J. N. E.*, Titanji, V. P. K.*, Legg, J., Brown, J., Ngeve, J., Njualem, D., Fondong, V. N. and Kvarnheden, A., in: Cameroon Journal of Agricultural Science, volume 2, number 1, pages 20-24, 2006.
 
Population dynamics of Bemisia tabaci (Homoptera: Aleyrodidae) parasitoids on cassava mosaic disease-resistant and susceptible varieties, Otim, M., Legg, J., Kyamanywa, S.*, Polaszek, A. and Gerling, D., in: Biocontrol Science and Technology, volume 16, number 2, pages 205-214, ISSN 0958-3157, 2006.
 
Strategies for controlling the Cassava Mosaic Disease Pandemic in Eastern and Central Africa through resistance breeding programs, Ntawuruhunga, P., Legg, J., Omongo, C. S.*, Lukombo, S.* and Kimani, E., 2006.
 
Identification of a defective molecule derived from DNA-A of the bipartite begomovirus of East African Cassava Mosaic Virus, Ndunguru, J.*, Legg, J., Fofana, B., Aveling, T.*, Thompson, G.* and Fauquet, C., in: Plant Pathology, volume 55, pages 2-10, 2006.
 
Cassava mosaic virus disease in East and Central Africa: epidemiology and management of a regional pandemic, Legg, J., Owor, B., Sseruwagi, P. and Ndunguru, J.*, in: Advances in Virus Research, volume 67, pages 355-418, ISSN 0065-3527, 2006.
 
The African Cassava Mosaic Disease pandemic and its mitigation, Legg, J. and Ntawuruhunga, P., 2006.
 

2005

Whiteflies as vectors of plant viruses in cassava and sweetpotato in Africa: The diversity of cassava mosaic begomoviruses in Africa, Markham, R., Briddon, R., Roussot, C., Farquhar, J., Okao-Okuja, G. and Legg, J., in: Whiteflies and whitefly-borne viruses in the tropics: building a knowledge base for global action, Centro Internacional de Agricultura Tropical, Cali, Colombia, 2005.
 
Cassava mosaic geminiviruses associated with cassava mosaic disease in Rwanda, Sseruwagi, P., Okao-Okuja, G., Kalyebi, A., Muyango, S.*, Aggarwal, V. and Legg, J., in: International Journal of Pest Management, volume 51, number 1, pages 17-23, ISSN 0967-0874, 2005.
 
Application of FTA technology for sampling, recovery and molecular characterization of viral pathogens and virus-derived transgenes from plant tissues, Ndunguru, J.*, Taylor, N., Yadav, J. S., Aly, H.*, Legg, J., Aveling, T.*, Thompson, G.* and Fauquet, C., in: Virology Journal, volume 2, number 45, ISSN 1743-422X, 2005.
 
Special topics on pest and disease management: Progress of cassava mosaic disease in Ugandan cassava varieties and in varietal mixtures, Sserubombwe, W.*, Thresh, J. M., Legg, J. and Otim-Nape, W., in: Whiteflies and whitefly-borne viruses in the tropics: building a knowledge base for global action, pages 324-331, 2005.
 
Whiteflies as vectors of plant viruses in cassava and sweetpotato in Africa: Uganda, Sseruwagi, P., Legg, J. and Otim-Nape, G.*, in: Whiteflies and whitefly-borne viruses in the tropics: building a knowledge base for global action, pages 46-53, Centro Internacional de Agricultura Tropical (CIAT), 2005.
 
Genetic diversity of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) populations and presence of the B biotype and a non-B biotype that can induce silverleaf symptoms in quash, in Uganda, Sseruwagi, P., Legg, J., Maruthi, M. N., Colvin, J., Rey, M.* and Brown, J., in: Annals of Applied Biology, volume 147, number 3, pages 253-265, ISSN 0003-4746, 2005.
 
Molecular biodiversity of cassava begomoviruses in Tanzania: evolution of cassava geminiviruses in Africa and evidence for East Africa being a center of diversity of cassava geminiviruses, Ndunguru, J.*, Legg, J., Aveling, T.*, Thompson, G.* and Fauquet, C., in: Virology Journal, volume 2, ISSN 1743-422X, 2005. [DOI]
 
Occurrence and activity of Bemisia tabaci parasitoids on cassava in different agro-ecologies in Uganda, Otim, M., Legg, J., Kyamanywa, S.*, Polaszek, A. and Gerling, D., in: BioControl, volume 50, pages 87-95, ISSN 1386-6141, 2005. [DOI]
 
Whiteflies as vectors of plant viruses in cassava and sweet potato in Africa: Introduction, Legg, J., pages 15-23, Centro International de Agricultura Tropical, ISBN 958-694-074-8, 2005.
 
Special topics on pest and disease management: management of the cassava mosaic disease pandemic in East Africa, Legg, J., Whyte, J., Kapinga, R. and Teri, J., in: Whiteflies and whitefly borne viruses in the tropics: building a knowledge base for global action, Centro Internacional de Agricultura Tropical, Cali, Colombia, pages 332-338, 2005.
 
Management of the Cassava Mosaic Disease Pandemic in East Africa, Legg, J., Whyte, J., Kapinga, R. and Teri, J., pages 332-338, Centro International de Agricultura Tropical, ISBN 958-694-074-8, 2005.
 

2004

Methods of surveying the incidence and severity of cassava mosaic disease and whitefly vector populations on cassava in Africa: a review, Sseruwagi, P., Sserubombwe, W.*, Legg, J., Ndunguru, J.* and Thresh, J. M., in: Virus Research, volume 100, number 1, pages 129-142, ISSN 0168-1702, 2004.
 
Field studies of cross protection with cassava Mosaic Geminiviruses in Uganda, Owor, B., Legg, J., Okao-Okuja, G., Obonyo, R., Kyamanywa, S.* and Ogenga-Latigo, M.*, in: Journal of Phytopathology, volume 152, number 4, pages 243-249, ISSN 1439-0434, 2004.
 
The effect of cassava mosaic geminiviruses on symptom severity, growth and root yield of a cassava mosaic virus disease-susceptible cultivar in Uganda, Owor, B., Legg, J., Okao-Okuja, G., Obonyo, R. and Ogenga-Latigo, M.*, in: Annals of Applied Biology, volume 145, number 3, pages 331-337, ISSN 0003-4746, 2004.
 
The cassava mosaic geminiviruses occurring in Uganda following the 1990s epidemic of severe cassava mosaic disease, Legg, J., Sseruwagi, P., Rey, M.* and Brown, J., in: Annals of Applied Biology, volume 145, number 1, pages 113-121, ISSN 0003-4746, 2004.
 
First evidence for the spread of East African cassava mosaic virus - Uganda (EACMV-UG) and the pandemic of severe cassava mosaic disease to Burundi, Legg, J., Bigirimana, S.*, Barumbanze, P.* and Obonyo, R., in: Plant Pathology, volume 53, number 2, pages 231, ISSN Online: 1365-3059, 2004.
 
Cassava mosaic geminiviruses in Africa, Legg, J. and Fauquet, C., in: Plant Molecular Biology, volume 56, pages 585-599, ISSN 0167-4412, 2004.
 
First report of cassava mosaic disease and cassava mosaic geminiviruses in Gabon, Legg, J., Ndjelassili, F. and Okao-Okuja, G., in: Plant Pathology, volume 53, number 2, pages 232, 2004.
 
Viruses associated with cassava mosaic disease in Senegal and Guinea Conakry, Legg, J., Okao-Okuja, G., Traore, L.* and Jorge, M., in: Journal of Phytopathology, volume 152, pages 69-76, 2004.
 

2003

Cassava: from poor farmer's crop to pacesetter of African rural development, Dixon, A., Bandyopadhyay, R., Coyne, D., Ferguson, M., Ferris, R. S. B., Hanna, R., Hughes, J., Ingelbrecht, I., Legg, J., Mahungu, N., Manyong, V., Mowbray, D., Neuenschwander, P., Whyte, J., Hartmann, P. and Ortiz, R., in: Chronica Horticulturae, volume 43, number 4, pages 8-15, ISSN 0578-039X, 2003.
 
Cassava mosaic disease pandemic in sub-Saharan Africa: an unsolved problem with a solution, Whyte, J., Mahungu, N., Khizzah, B., Kanju, E., Lokko, Y., Andrade, M., Legg, J., Ogbe, F. and Dixon, A., in: Paper presented at: 13th Symposium of the International Society of Tropical Root Crops (ISTRC); 10-14 November, International Conference Center, Arusha, Tanzania, 2003.
 
Potential for biological control of the whitefly, Bemisia tabaci, vector of cassava mosaic geminiviruses using parasitoids in Uganda, Otim, M., Legg, J., Kyamanywa, S.*, Polaszek, A. and Gerling, D., in: Paper presented at: 3rd International Bemisia Workshop, 17-20 March, Barcelona, Spain, 2003.
 
Cassava virus diseases in Africa, Legg, J. and Thresh, J. M., in: Plant Virology in sub-Saharan Africa: proceedings of a conference organized by IITA, 4-8 June 2001., pages 517-552, International Institute of Tropical Agriculture, IITA, 2003.
 
Biological control of whiteflies in sub-Saharan Africa, Legg, J., Gerling, D. and Neuenschwander, P., pages 87-100, chapter 6, CABI, ISBN 0-85199-639-6, 2003.
 
Virus diseases of root crops in Africa: Abstracts, Legg, J., Gibson, R. and Hughes, J., in: Paper presented at: Thirteenth smposium of the International Society for Tropical Root Crops (ISTRC); 10-14 November, Arusha, Tanzania, 2003.
 
Cassava brown streak virus disease: past, present and future: proceeding, Legg, J. and Hillocks, R. J., Natural Resources International Limited, International Institute of Tropical Agriculture, 2003.
 

2002

Occurrence of the Uganda variant of East African cassava mosaic virus (EACMV-Ug) in western Democratic Republic of Congo and the Congo Republic defines the westernmost extent of the CMD pandemic in East/Central Africa, Neuenschwander, P., Hughes, J., Ogbe, F., Ngatse, J. and Legg, J., in: Plant Pathology, volume 51, pages 385, ISSN 0032-0862, 2002.
 
Population dynamics of cassava whitefly parasitoids on cassava mosaic disease resistant and susceptible cultivars. Research Application Summary, Otim, M., Kyamanywa, S.* and Legg, J., in: Paper presented, Entebbe, Uganda, 2002.
 
Population dynamics of cassava whitefly parasitoids on cassava mosaic disease resistant and susceptible cultivars, Otim, M., Kyamanywa, S.* and Legg, J., 2002.
 
Plants infected with mild strains of cassava mosaic geminiviruses (CMGs) outperform initially healthy plants under high CMG inoculum pressure conditions in Uganda, Owor, B., Legg, J., Okao-Okuja, G., Obonyo, R. and Ogenga-Latigo, M.*, in: Paper presented, Entebbe, Uganda, 2002.
 
Interactions between cassava mosaic geminiviruses and the African pandemic of cassava mosaic disease, Owor, B., Legg, J., Okao-Okuja, G., Obonyo, R. and Ogenga-Latigo, M.*, in: Paper presented, Kampala, Uganda, 2002.
 
A distinct Bemisia tabaci (Gennadius) (Hemiptera: Sternorrhyncha: Aleyrodidae) genotype cluster is associated with the epidemic of severe cassava mosaic virus disease in Uganda, Legg, J., French, R., Rogan, D., Okao-Okuja, G. and Brown, K., in: Molecular Ecology, volume 11, number 7, pages 1219-1229, ISSN 0962-1083, 2002. [DOI]
 

2001

New reports of the occurrence of the Uganda variant of East African Cassava Mosaic Virus (EACMV-Ug) from western Democratic Republic of Congo and the Congo Republic define the westernmost extent of the CMD pandemic in East/Central Africa, Neuenschwander, P., Hughes, J., Ogbe, F., Ngatse, J. and Legg, J., in: New Disease Reports, volume 4, 2001.
 
The effect of cassava mosaic geminiviruses on the root yield of a cassava mosaic disease susceptible cultivar in Uganda, Owor, B., Legg, J., Okao-Okuja, G. and Ogenga-Latigo, M.*, 2001.
 
Effect of cassava mosaic geminiviruses on the growth and yield of a cassava mosaic disease susceptible cultivar in Uganda, Owor, B., Legg, J., Okao-Okuja, G. and Ogenga-Latigo, M.*, in: Abstracts of the Fifth International Meeting of the Cassava Biotechnology Network, 4-9 Nov, St. Louis, Missouri, USA, pages S8-S15, 2001.
 

2000

Lutte contre les maladies du manioc: guide de la pratique de lutte integree a l'usage des vulgarisateurs, Msikita, W., James, B., Nnodu, E.*, Legg, J., Wydra, K. and Ogbe, F., 2000.
 
Disease control in cassava farms: IPM field guide for extension agents, Msikita, W., James, B., Nnodu, E.*, Legg, J., Wydra, K. and Ogbe, F.*, 2000.
 
Status of sweetpotato virus disease in East Africa-a 1999 update on incidence, Aritua, V.*, Mwanga, R.*, Legg, J., Ndunguru, J.*, Kamau, J., Vetten, H. and Gibson, R., in: Abstracts of the Fifth triennial congress of the African Potato Association, Kampala, Uganda, 30 May-2 June. Kampala, Uganda, pages 11, 2000.
 
Epidémiologie de la mosaïque du manioc et intéractions hôte/virus/vecteur, Ranomenjanahary, S., Ramelison, J. and Legg, J., in: Francophones de Virologie, Paris, France, 6-7 April, 2000.
 
Use of meristem culture to produce banana-streak virus-free plantlets, Tumuboine, E., Rubaihayo, P.* and Legg, J., in: Paper presented at: Fourth regional meeting of the Forum on Agricultural Resource Husbandry, Lilongwe, Malawi, 10-14 July, 2000.
 
Development of sweetpotato disease as influenced by inoculum density, Aritua, V.*, Legg, J. and Gibson, R., pages 10, 2000.
 
The effect of cassava mosaic geminiviruses on symptom severity and growth of a susceptible cassava cultivar in Uganda, Owor, B., Legg, J., Kyamanywa, S.*, Osiru, D.* and Ogenga-Latigo, M.*, in: Paper presented at: Fourth regional meeting of the Forum on Agricultural Resource Husbandry, Lilongwe, Malawi, 10-14 July, 2000.
 
An overview: strengthening IPM for the management of cassava mosaic virus disease in East Africa, Legg, J., Owor, B., Kyamanywa, S.*, Osiru, D.* and Ogenga-Latigo, M.*, pages 100-104, 2000.
 
Cassava mosaic virus disease in East Africa: a dynamic disease in a changing environment, Legg, J. and Thresh, J. M., in: Virus Research, volume 71, pages 135-149, ISSN 0168-1702, 2000.
 

1999

Geminiviruses and whiteflies across Africa, Briddon, R., Farquhar, J., Roussot, C., Banks, G. K., Bedford, I. D., Legg, J. and Markham, P. G., in: Abstracts of the VIIth International Plant Virus Epidemiology Symposium, Aguadulce (Almeria), Spain, 11-16 April 1999, pages 75-76, 1999.
 
Effect of local inoculum on the spread of sweetpotato virus disease: limited infection of susceptible cultivars following widespread cultivation of a resistant sweetpotato cultivar, Aritua, V.*, Smit, N. E. J. M., Legg, J. and Gibson, R., in: Plant Pathology, volume 48, number 5, pages 655-661, ISSN 0032-0862, 1999.
 
An overview of the incidence of cassava mosaic disease in East Africa, 1998 update, Sseruwagi, P., Legg, J. and Otim-Nape, G.*, in: Abstracts of the VIIth International Plant Virus Epidemiology Symposium, Aguadulce (Almeria), Spain, 11-16 April 1999, pages 87-88, 1999.
 
Emergence, spread and strategies for controlling the pandemic of cassava mosaic virus disease in east and central Africa, Legg, J., in: Crop Protection, volume 18, number 10, pages 627-637, ISSN 0261-2194, 1999.
 
Fighting cassava mosaic pandemic: networking critical, Legg, J., in: Agriforum, volume 7, pages 1, 12, 1999.
 
The pandemic of cassava mosaic virus disease in East Africa: control strategies and regional partnerships, Legg, J., Kapinga, R., Teri, J. and Whyte, J., in: Roots, volume 6, pages 10-19, 1999.
 
Progress in the diagnosis and epidemiological characterisation of cassava mosaic geminiviruses in East Africa, Legg, J. and Okao-Okuja, G., in: Abstracts of the VIIth International Plant Virus Epidemiology Symposium, Aguadulce (Almeria), Spain, 11-16 April 1999, pages 74-75, 1999.
 

1998

Survey of cassava virus diseases in Tanzania, Legg, J. and Raya, M., in: International Journal of Pest Management, volume 44, number 1, pages 17-23, ISSN 0967-0874, 1998.
 
Changes in the incidence of African cassava mosaic geminivirus and the abundance of its whitefly vector along south-north transects in Uganda, Legg, J. and Ogwal, S., in: Journal of Applied Entomology, volume 122, pages 169-178, 1998.
 

1997

Opportunities for commercializing cassava in East and Southern Africa, Ferris, R. S. B., Whyte, J., Khizzah, B. and Legg, J., in: African Crop Science Conference, 13-17 Jan, Pretoria, South Africa, pages 1427-1433, African Crop Science Society, Kampala, Uganda, 1997.
 
Cassava germplasm enhancement for food security and industrial utilization in East and Southern Africa, Khizzah, B., Whyte, J., Legg, J., Ferris, R. S. B. and Ojulong, H., volume 3, pages 653-654, British Crop Protection Council, 1997.
 
Diagnostic survey of African cassava mosaic viruses in Tanzania, Malawi and Zambia, Ogbe, F., Legg, J., Raya, M., Muimba-Kankolongo, A., Theu, M. P., Phiri, G., Kaitisha, G. and Chalwe, A., in: Roots Newsletter, volume 4, number 2, pages 12-15, 1997.
 

1996

Host-associated strains within Ugandan populations of the whitefly Bemisia tabaci (Genn.),(Hom., Aleyrodidae), Legg, J., in: Journal of Applied Entomology, volume 120, number 1-5, pages 523-527, ISSN 0931-2048, 1996. [DOI]
 

1994

Bemisia tabaci: the whitefly vector of cassava mosaic geminiviruses in Africa: an ecological perspective, Legg, J., in: African Crop Science Journal, volume 2, number 4, pages 437-449, ISSN 1021-9730, 1994.
 

Publications as Editor

2008

C3P cassava planting materials quality management in the multiplication sites, 2008.
 

2006

Emergency programme to combat the Cassava Mosaic Disease pandemic in East and Central Africa; a system-wide whitefly IPM affliated project: proceedings of the sixth regional stakeholders meeting, Mwanza, Tanzania, September 22-24, 2004, IITA, , International Institute of Tropical Agriculture (IITA), 2006.
 

2002

Population dynamics of cassava whitefly parasitoids on cassava mosaic disease resistant and susceptible varieties, in: Paper presented, Entebbe, Uganda, 2002.