Abstract
The influence of NPK fertiliser on the symptoms and spread of cassava mosaic virus disease (CMD) and on populations of the whitefly vector (Bemisia tabaci) was investigated in Uganda using three cassava varieties: Migyera (CMD-resistant), Nase 2 (tolerant) and Ebwanatereka (highly susceptible) in 1995-96 and 1996-97 planting seasons. In each season NPK fertiliser significantly (P Key Words: Bemisia tabaci, disease progress, Manihot esculentum Resume L'influence de l'engrais NPK sur le symptome et la progression de la mosaique du manioc (CMD) et sur la population de Bemisia tabaci etait evaluee en Ouganda utilisant trois varietes du manioc: Migyera (resistant au CMD), Nase 2 (tolerant) et Ebwanatereka (tres susceptible) pour les saisons pluviales 1995-96 et 1996-97. Dans chaque saison l'engrais NPK a augmente significativement l'incidence du CMD et a conduit a une infection precose et une progression de la maladie sur les varietes Migyera et Nase 2 comparees aux terrains no-traites par l'engrais. Par contre, Ebwanatereka n'a pas montre des differences significatives en terme d'infection et de progression compare aux parcelles no-traitees et traitees. La population de Bemisia tabaci par rejet etait significativement augmentee (P Mots Cles: Bemisia tabaci, progression d'une maladie, Manihot esculentum (Af Crop Sci J 2003 Vol 11 No 3 pp171-180)
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