Journal of Biological Control

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Isolates of the entomopathogenic mitosporic ascomycete, Beauveria bassiana were evaluated against Spodoptera litura using leaf spray method. Mortality of 66.67, 73.33 and 80.0% with respect to the isolates Bb02, Bb09 and Bb10, respectively, was obtained four days after treatment. LC50 of the isolates was 2.1×106, 3.6×107 and 1.2×107 conidia ml-1 for Bb02, Bb09 and Bb10, respectively. The LT50 value for Bb02 and Bb09 was 4.8 days, whereas it was 4.0 days for Bb10 @108 spore mL-1. The germination percentage was 79.83, 88.33 and 95.53% for Bb02, Bb09 and Bb10, respectively Bb10 isolate was the most virulent with potential for the management of S. litura.

Keywords

Beauveria bassiana, Spodoptera litura, Germination, LC50, LT50, Bioassay.
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