tailieunhanh - In vitro efficacy of bio control agents against cotton leafhopper, Amrasca biguttula biguttula (Ishida) (Homoptera: Cicadellidae)

The bio efficacy of selected bio control agents viz. Metarhizium anisopliae, Beauveria bassiana, Lecanicilium lecanii and Chrysoperla zastrowii against Amrasca biguttula biguttula was studied under insectary, Department of Agricultural Entomology, TNAU, Coimbatore, India during 2014-2015. Three different concentrations viz., 1 x 104 , 1 x 106 , 1 x 108 spore/ml of these each entomopathogenic fungus were tested to evaluate the effective concentration. Among the three concentrations, 1 x 108 spores/ml of L. lecanii recorded the highest mortality of leafhopper withLT50 value of hours and low LC50 value observed in L. lecanii ( spores/ml). In pot cultures studies, Among the bio-control agents, L. lecanii was the most effective in reducing cotton leafhoppers with average per cent mortality of followed by C. zastrowii, B. bassiana and fungi combination with average per cent mortality of , and respectively. | In vitro efficacy of bio control agents against cotton leafhopper Amrasca biguttula biguttula Ishida Homoptera Cicadellidae

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