Efficacy of Beauveria bassiana as bio-control agent against Hadda beetle Epilachna dodecastigma Mulsant (Coccinellidae: Coleoptera) under laboratory conditions
Efficacy of Beauveria bassiana as bio-control agent against Hadda beetle Epilachna dodecastigma Mulsant (Coccinellidae: Coleoptera) under laboratory conditions
Hanif Gul and Abida Hamid
ABSTRACT
To test the pathogenicity of Entomopathogenic fungus Beauveria bassiana (Bals) vuill against all stages of E. dodecastigma trials were conducted in the laboratories at the Pakistan Forest Institute, Peshawar. The fungus, B. bassiana was tried in the doses of 0.4 x 104 spores / ml 0.6 x 104 spores/ml and 0.8 x 104 spores / ml against all stages of Hadde beetles. The fungus B. bassiana proved to be effective against all the stages except eggs. For grubs among the three doses 60% mortality occurred after 120 hours in the dose of 0.8 x 104 spores / ml while 53% and 33% mortality was recorded by other two doses in the same time period respectively. For pupae highest does gave 57% kill in 168 hours while the other two doses gave 43 and 26% mortality in the same time period respectively. For adults among the three doses 55% mortality occurred after 192 hours in the dose of 0.8 x 104 spores/ml while doses of 0.6 x 104 spores/ml and 0.4 x 104 spores/ml gave only 34 and 22% kill respectively.
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March 1997
Vol. 47, Iss. 1
