Abstract
Abstract In separate experiments, Bemisia tabaci (Gennadius) from Namulonge, Uganda, was taken from a colony reared on uninfected cassava plants (Manihot esculenta) Crantz. (nonviruliferous whiteflies) and a colony reared on cassava plants infected with East African cassava mosaic virus (viruliferous whiteflies) and allowed to oviposit on uninfected and East African cassava mosaic virus-infected cassava plants for 3 d. There were no significant differences in the number of eggs oviposited and in the number of first instar, second/third instar collectively, and fourth-instar nymphs at different periods on the uninfected and infected plants. The number and sex ratio of eclosed adults as well as the total developmental period were also not significantly different between B. tabaci developing on uninfected or infected plants. These were the findings where either nonviruliferous or viruliferous whiteflies were allowed to oviposit on the plants. Highest mortality occurred on fourth instars developing on uninfec...
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