Efficacy of Local Isolates of Beauveria bassiana against Spodoptera litura (F.) (Lepidoptera: Noctuidae)

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Authors

  • Department of Zoology, Thiagarajar College, Madurai 625 009, Tamil Nadu ,IN
  • Department of Zoology, Thiagarajar College, Madurai 625 009, Tamil Nadu ,IN
  • Department of Zoology, Thiagarajar College, Madurai 625 009, Tamil Nadu ,IN

DOI:

https://doi.org/10.18311/jbc/2011/3836

Keywords:

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

Abstract

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 2.1í—106, 3.6í—107 and 1.2í—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.