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The entomopathogenic fungi Beauveria bassiana, Metarhizium anisopliae, Lecanicillium lecanii and Isaria fumosorosea were tested for their efficacy in managing the exotic spiraling whitefly Aleurodicus dispersus (Hemiptera, Aleyrodidae) on cassava (Manihot esculenta) during 2 seasons (2011-2012 and 2012-2013). The fungi I. fumosorosea and L. lecanii exhibited promising levels of control (> 70% mortality of the A. dispersus population). The percent mortality increased over time in both seasons. Application of I. fumosorosea was highly pathogenic to A. dispersus in both seasons compared to the other entomopathogenic fungi. Analysis of the percent mortality in both seasons revealed differences in efficacy between 3 and 15 days after treatment. The season also influenced the effects of the fungi on the A. dispersus population. Thus, entomopathogenic fungi have the potential to manage A. dispersus infestation of cassava.

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Results of field experiments revealed that three releases of biocontrol agents viz., Tricbogramma chilonis (1,00O,OOO/ha/release) and Brinckocbrysa scelestes (50,0OO/ha/release) on 90, 105 and 120 days after sowing could effectively check the population of Heliotbis armigera and Bemisia tabaci which was equal to that of insecticides. Two applications of nuclear polyhedrosis virus of Spodoptera litura at 250 larval equivalents (LE)/ha with adjuvants could effectively control S. litura larval population and damage. The seed cotton yield could also be increased in biocontrol plots which was equal to that of insecticide treated plots.I . T~-~chogrammu cbilonis (Ishii.) at 1,000,000 parasitoids/hdrelease, 2. Bririckocl~rysa ( C h r y s o p~) scelestes (Banks) grubs at 50,000/ha/rclcase, 3 . Spodopteru litura NPV at 250 LE with adjuvants crude sugar, 2.50 kg + cotton seed kernal powder (CSKP) 0.3 kg/ha. U.S.