@ARTICLE {HERREN:1987, title = {African-wide biological control project of cassava mealybug and cassava green mites: a review of objectives and achievements}, author = {Herren, H. R. }, journal = {Insect Science and its Application}, year = {1989}, volume = {8}, pages = {837--840}, note = {RTB; Root and Tuber; Cassava}, }