Effect of isaria fumosoroseus on eretmocerus sp. nr. furuhashii (hymenoptera: aphelinidae),a parasitoid of bemisia tabaci (hemiptera: aleyrodidae)

Pathogenicity of isaria fumosoroseus wize against eretmocerus sp. nr. furuhashii rose & zolnerowich (hymenoptera: aphelinidae),was investigated under laboratory conditions to determine if the fungal infection of the whitefly (bemisia tabaci) host can effect some of the bioparameters of this parasitoid,i.e. survival rate,longevity and fecundity. the results indicated that the number of parasitized larvae surviving decreased with increasing concentrations of i. fumosoroseus. i. fumosoroseus treatment after 6 and 12 days of oviposition decreased with increasing concentrations of i. fumosoroseus. there were no significant differences on adult parasitoid survivorship after 7 days among all treatments. the results showed a non significant effect of i. fumosoroseus on longevity and next offsprings of e. furuhashii females. the percentage emergence of parasitoids from the whitefly nymphs produced by the females emerging from treated pupae was almost comparable; being greatest (70.7%) in control and lowest (64.1%) in fungal treatment of 1×107 conidia/ml. the longest longevity (4.27 days) was observed for control treatment,whereas the lowest one (4.10 days) was observed for fungal treatment of 1×10 8 conidia/ml. copyright 2010 zoological society of pakistan.