Evaluation of fungal pathogen, Fusarium semitectum Berk and Ravenel against okra aphid, Aphis gossypii Glover under laboratory and green house conditions

Efficacy of fungal pathogen, Fusarium semitectum Berk and Ravenel was evaluated against okra aphid, Aphis gossypii Glover under laboratory and green house condition sat the Departmentof Entomology, College of Agriculture, Shimoga, India during 2007–08. The results showed that the highest mortality of 79.90 and 64.40 percent nymphs and adults, respectively was recorded at 4.60 x 10⁹ spores per ml of F. semitectum. The earlier instars were more susceptible to fungal infection than the later stages. Among the seven treatments evaluated under green house conditions, the combination of F. semitectum at 4.60x10⁹ spores per ml+ dicofol 0.03 percent recorded the highest mortality of 66.30 percent where as dicofol alone recorded the mortality of 87.26 per cent.