Titles (44)Keywords (1)Abstracts (2)
Banana Xanthomonas wilt in the DR Congo: impact, spread and management, Ndungo, V.*, Fiaboe, K. and Mwangi, M., in: Journal of Applied Biosciences, volume 1, number 1, pages 1-7, ISSN 1997-5902, 2008.
 
Bioecology of fall armyworm Spodoptera frugiperda (J. E. Smith), its management and potential patterns of seasonal spread in Africa, Niassy, S., Agbodzavu, K. M., Kimathi, E. K., Mutune, B., Abdel-Rahman, E. M., Salifu, D., Hailu, G., Belayneh, Y. T., Felege, E., Tonnang, H., Ekesi, S. and Subramanian, S., in: PloS ONE, volume 16, number 6: e0249042, pages 1-24, ISSN 1932-6203, 2021. [DOI]
 
Biological control of cassava green mite in Kenya: spread and persistence of the predatory mite Typhlodromalus aripo, and impact on cassava green mite and cassava root yield, Kariuki, C., Hanna, R., Toko, M., Ngari, B. and Irungu, R., in: Book of Abstracts of the 9th Triennial Symposium of the International Society for Tropical Root Crops-Africa Branch, 31 October-5 November 2004, Mombasa, Kenya, 2004.
 
Cassava diseases, their spread and control, Terry, E. R. and Perreaux, D., 1983.
 
Cassava Root Necrosis Disease (CRND): a new crop disease spreading in western Democratic Republic of Congo and in some central African countries, Bakelana, T.*, Boykin, L. M., Kehoe, M., Pita, J., Monde, G.*, Mahungu, N., Munseki, L.*, Kanana, T.* and Kalonji, M.*, in: Journal of Agricultural Science, volume 12, number 3, pages 1-12, ISSN 1916-9752, 2020. [DOI]
 
Characterization of newly introduced bacterial blight pathogen risk to African rice production and preparedness plans to limit the spread of seed-borne pathogen of high phytosanitary importance: Working paper, Onaga, E., Pinili, D.*, van Schepler, L.*, Eyokia, M., Euridice, T., Dossou, A. B., Bachabi, F., Gouete, M. A., Adjoua, M., Negussie, Z., Amoah, N. K. A., Manneh, B. and Kumar, P. L., 2023.
 
Circumstances of rapid spread of cultivation of improved cassava varieties in Nigeria, Nweke, F., Hahn, S. K. and Ugwu, B., in: Journal of Farming Systems Research-Extension, volume 4, number 3, pages 93-119, 1994.
 
Comparative study of banana Xanthomonas wilt spread in mid and high altitudes of the Great Lakes region of Africa, Mwangi, M., Tinzaara, W., Vigheri, N., Namu, F., Ragama, P. and Bandyopadhyay, R., in: Deutscher Tropentag (DTT), Bonn/Germany, 11-13 October 2006, 2006.
 
Comparative study of banana Xanthomonas wilt spread in mid and high altitudes of the Great Lakes region of Africa, Mwangi, M., Tinzaara, W., Vigheri, N., Namu, F., Ragama, P. and Bandyopadhyay, R., 2006.
 
Cowpea (Vigna unguiculata L. Walp) hosts several widespread bradyrhizobial root nodule symbionts across contrasting agro-ecological production areas in Kenya, Ndungu, S. M., Messmer, M. M., Ziegler, D., Gamper, H. A., Meszaros, E., Thuita, M., Vanlauwe, B., Frossard, E. and Thonar, C., in: Agriculture, Ecosystems & Environment, volume 261, pages 161-171, ISSN 0167-8809, 2018. [DOI]
 
Dispersal and spread of exotic phytoseiids in Africa, Yaninek, J. and Hanna, R., in: Abstracts of the XXI International Congress of Entomology, Iguassu Falls, Brazil, 20-26 August, pages 2, 2000.
 
Distribution and potential impact of cassava variety spread by UPoCA, Okechukwu, R., James, B., Ntawuruhunga, P., Mahungu, N., Boahen, S., Kanju, E. and Osei-Sarfoh, A., 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 325-331, ISTRC-AB, Ibadan, Nigeria, 2012.
 
Distribution and potential impact of cassava variety spread by UPoCA, Okechukwu, R., James, B., Ntawuruhunga, P., Mahungu, N., Boahen, S., Kanju, E., Osei-Sarfoh, A., Fannah, S., Jumbo, S., Sonder, K. and Alabi, T. R., Abstract in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
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.
 
Emergence and spread of Tobacco streak virus menace in India and control strategies, Kumar, P. L., Prasadarao, R., Reddy, A., Madhavi, J. K., Anitha, K. and Waliyar, F., in: Indian Journal of Plant Protection, volume 36, number 1, pages 1-8, ISSN 0253-4355, 2008.
 
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.
 
Establishment and spread of Gyranusoidea tebygi Noyes and Anagyrus mangicola Noyes (Hymenoptera: Encyrtidae), two biologigal control agents released against the mango mealybug Rastrococcus invadens Williams (Homoptera: Pseudococcidae) in Africa, Neuenschwander, P., Boavida, C., Bokonon-Ganta, A. H., Gado, A. and Herren, H. R., in: Biocontrol Science and Technology, volume 4, pages 61-69, 1994.
 
Establishment, spread, and impact of Teretriosoma nigrescens (Coleoptera: Histeridae), an exotic predator of the larger grain borer (Coleoptera: Bostrichidae) in southwestern Benin, Borgemeister, C., Djossou, F., Adda, C., Schneider, H., Djomamou, B., Degbey, P., Azoma, B. and Markham, R., in: Environmental Entomology, volume 26, number 6, pages 1405-1415, ISSN 0046-225X, 1997.
 
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.
 
Interaction between two synthetic pyrethroids and the spread of two nonpersistent viruses in cowpea, Roberts, J. M. F., Hodgson, C. J., Jackai, L., Thottappilly, G. and Singh, S. R., in: Annals of Applied Biology, volume 122, pages 57-67, 1993.
 
Introducing Participatory Research and Extension Aproaches (PREA), Amaza, P., Helsen, J., Olayemi, J. K.* and Ellis-Jones, J., 2006.
 
Introduction and spread of the cassava gree mite, Mononychellus tanajoa (Bondar) (Acari: Tetranychidae), an exotic pest in Africa and the search for appropriate control methods: a review, Yaninek, J. and Herren, H. R., in: Bulletin of Entomological Research, volume 78, pages 1-13, 1988.
 
Investigations on the spread of the spiralling whitefly (Aleurodicus dispersus, Russell) and field evaluation of elite cassava populations for genetic resistance, Asiwe, J. A. N., Dixon, A., Jackai, L. E. N.+ and Nukenine, E., in: African Journal of Root and Tuber Crops, volume 5, number 1, pages 12-17, ISSN 1118-2075, 2002.
 
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.
 
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.
 
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.
 
Occurrence and spread of the banana fungus Fusarium oxysporum f. sp. cubense TR4 in Mozambique, Viljoen, A.*, Mostert, D.*, Chiconela, T.*, Buekes, I.*, Fraser, C.*, Dwyer, J.*, Murray, H.*, Amise, J.*, Matabuana, E. L.*, Tazan, G.*, Amugoli, O. M.*, Mondjana, A. M.*, Vaz, A.*, Pretorius, A.*, Bothma, S.*, Rose, L. J.*, Beed, F., Dusunceli, F., Chao, C. P. and Molina, A. B.*, in: South African Journal of Science, volume 116, number 11-12, pages 1-13, ISSN 0038-2353, 2020. [DOI]
 
Phytosanitary interventions for safe global germplasm exchange and the prevention of transboundary pest spread: the role of CGIAR Germplasm Health Units, Kumar, P. L., Cuervo, M., Kreuze, J., Muller, G., Kulkarni, G., Kumari, S., Massart, S., Mezzalama, M., Alakonya, A.+, Muchugi, A., Graziosi, I., Ndjiondjop, M., Sharma, R. and Negawo, A. T., in: Plants, volume 10, number 2: 328, pages 1-29, ISSN 2223-7747, 2021. [DOI]
 
Plant technology in today's world and problems of continued widespread adoption in LDCS, Okigbo, B., 1976.
 
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]
 
Pre-and-postharvest management of aflatoxin in maize: an African perspective, Hell, K., Fandohan, P.*, Bandyopadhyay, R., Kiewnick, S., Sikora, R. and Cotty, P., pages 219-230, chapter 19, CABI Publishing, ISBN 978-1-84593-082-0, 2008.
 
Preventing the transboundary spread of pests and pathogens through germplasm phytosanitary management, Kumar, P. L., Oguntade, O., Ajamu, B., Oludare, O., Lateef, M., Oviasuyi, T., Alaohuo, S. and Oyelami, O., International Institute of Tropical Agriculture, 2022.
 
Release, establishment and spread of the natural enemy Fopius arisanus (Hymenoptera: Braconidae) for the control of the invasive fruit fly Bactrocera dorsalis (Diptera: Tephritidae) in Benin, west Africa, Gnanvossou, D., Hanna, R., Bokonon-Ganta, A.*, Ekesi, S. and Mohamed, S., pages 1-35, 2016.
 
Release, establishment, spread, and impact of the weevil Neohydronomus affinis (Coleoptera: Curculionidae) on water lettuce (Pistia stratiotes) in Bénin, West Africa, Ajuonu, O. and Neuenschwander, P., in: African Entomology, volume 11, pages 205-212, 2003.
 
Risk of banana Xanthomonas wilt spread through trade, Nakato, V., Beed, F., Ramathani, I., Kubiriba, J.*, Rwomushana, I.* and Opio, F.*, in: Journal of Crop Protection, volume 2, number 2, pages 151-161, ISSN 2251-9041, 2013.
 
Spread and current distribution of the cassava mealybug, Phenacoccus manihoti (Homoptera: Pseudococcidae), in Zaire, Hennessey, R. D., Neuenschwander, P. and Muaka, T.*, in: Tropical Pest Management, volume 36, number 2, pages 103-107, ISSN 0967-0874, 1990. [DOI]
 
Spread and performance of improved cassava varieties in Nigeria, Nweke, F., Ugwu, B. and Dixon, A., COSCA working paper, International Institute of Tropical Agriculture (IITA), ISBN 978-131-106-1, 1996.
 
Spread of new soybean varieties in a traditional soybean growing area of Nigeria, Manyong, V., Dashiell, K., Oyewole, B. and Blahut, G., in: Towards sustainable farming systems in sub-Saharan Africa: proceedings of the second international symposium of the African Association of Farming Systems Research, Extension and Training (AAFSRET), Ouagadougou, Burkina Faso, 21–23 August 1996, pages 151-162, AAFSRET, 1998.
 
Spread of Xanthomonas campestris pv. musacearum in banana plants: implications for management of banana Xanthomonas wilt disease, Adikini, S., Beed, F., Tusiime, G.*, Tripathi, L., Kyamanywa, S.*, Lewis Ivey, M. L. and Miller, S. A., in: Canadian Journal of Plant Pathology, pages 1-11, ISSN 0706-0661, 2013. [DOI]
 
Spreading the word about CBB: who needs to know what?, Woodis, R. A., 1976.
 
The importance of colonizing and noncolonizing aphid vectors in the spread of cowpea aphid-borne mosaic virus, Atiri, G.*, Enobakhare, D.A. and Thottappilly, G., in: Crop Protection, volume 5, number 6, pages 406-410, ISSN 0261-2194, 1986.
 
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]
 
The spread and persistence of exotic phytoseiid, Typhlodromalus aripo De Leon (Acari: Phytoseiidae) and its effect on cassava green mite in Kenya, Kariuki, C., Hanna, R., Toko, M. and Ngari, B., in: Proceedings of the 9th ISTRC-AB Symposium, pages 693-704, Mombasa, Kenya, 2007.
 
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.
 
Improving the productivity of cowpea in the savannas of northeast Nigeria through participatory evaluation and dissemination of improved varieties, Kamara, A., Omoigui, L. and Ewansiha, S. U., Abstract (Oral presentaion) 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.
 
Keywords:cowpea varieties, PREA, farmer participatory evaluation

Influence of phosphorus application on growth and yield of soybean genotypes in the tropical savannas of northeast Nigeria, Kamara, A., Abaidoo, R., Kwari, J.* and Omoigui, L., in: Archives of Agronomy and Soil Science, volume 53, number 5, pages 539-552, 2007.
 
Abstract:
The cultivation of soybean is increasing in the savannas of Nigeria due to its widespread use in the food and feed industry. Production is, however, constrained by low soil phosphorus (P) levels in northeast Nigeria. This study evaluated four soybean varieties for their response to three rates of P in two agro-ecozones in 2004 and 2005. Experimental design was a split-plot arrangement of treatments with three replications. The main plots were assigned the P treatments and subplots were soybean cultivars randomised within the main plots. The studies found that soybean responds to P application but differences between 20 and 40 kg P/ha were not significant, despite low test P levels. This may be due to limitations in other nutrients. More studies are needed to determine the synergistic effect of P and other nutrients on soybean growth and yield. Soybean growth and seed yield were lower in 2004 than in 2005 because trials were established comparatively late in 2004 and crops were therefore affected by late season moisture stress. There is, therefore, a need to establish the appropriate time for planting soybean in these zones. Late maturing varieties produced higher yields than early maturing varieties in 2005 probably due to early planting which allowed full use of the growing season.

Novel sources of resistance to Fusarium stalk rot of maize in tropical Africa, Afolabi, C., Ojiambo, P., Ekpo, E.*, Menkir, A. and Bandyopadhyay, R., in: Plant Disease, volume 92, number 5, pages 772-780, ISSN 0191-2917, 2008.
 
Abstract:
Fusarium stalk rot is one of the most widespread and destructive diseases of maize, and deployment of resistant genotypes is one of the most effective strategies for controlling the disease. Fifty inbred lines and four checks from the breeding program of the International Institute of Tropical Agriculture were evaluated in field trials at Ikenne and Ibadan, Nigeria in 2003 and 2004 to identify new sources of resistance to stalk rot caused by Fusarium verticillioides. Evaluations were conducted under artificial inoculation and natural infection at Ibadan and Ikenne, respectively. Disease severity was recorded using a severity scale (SS) and direct estimation of stalk discoloration (SD). The two methods of disease assessment were compared and combined to classify genotypes into resistance groups using results from rank-sum analysis. In 2003, disease severity ranged from SS = 1 to 5 and SD = 1.3 to 33.8% at both locations. Both SS and SD were significantly (P < 0.01) higher in 2003 than in 2004 at the two locations. In both years, inbred lines significantly differed in SS (P < 0.02) and SD (P < 0.04) at Ibadan. Similarly, inbred lines significantly differed in SS (P < 0.04) and SD (P < 0.04) when genotypes were evaluated at Ikenne. Disease assessments based on SS and SD were significantly correlated (0.68 < r < 0.95, P < 0.01) in both years. Based on the results from rank-sum analysis, inbred lines were separated into highly resistant, resistant, moderately resistant, moderately susceptible, susceptible, and highly susceptible groups. At Ibadan, 6 (11.1%) and 8 (14.8%) were identified as highly resistant and resistant, respectively, whereas 11 (20.4%) were identified as resistant at Ikenne. Inbred lines 02C14609, 02C14643, 02C14654, and 02C14678 were consistently classified as either highly resistant or resistant to stalk rot across locations and years while the check genotypes were classified either as susceptible or moderately susceptible to stalk rot. These four inbred lines identified to have high levels of disease resistance may be used for breeding maize with resistance to Fusarium stalk rot.