Bio efficacy and cry profile of native Bacillus thuringiensis isolates against cabbage leaf webber, Crocidolomia binotalis and Spodoptera litura Fabricius

摘要

An investigation was carried out to assess the bio-efficacy and cry profile of hundred native Bacillus thuringiensis isolates against Cabbage Leaf Webber viz., Crocidolomia binotalis and Spodoptera litura at the Department of Entomology, University ofAgricultural Sciences, Dharwad. Among the hundred native isolates used, isolates DBT-763, DBT-787, DBT-754 and DBT-2370 reported 86.67 percent mortality against Crocidolomia binotalis and DBT-772 showed 73.33 per cent mortality against Spodoptera litura. Lepidopteron specific cry genes viz., cryl, cry2, cry8, and cry9 genes amplified in native isolates viz., DBT-2367, DBT-2366, DBT-2299, DBT-2299, respectively and none of the studied native isolates shown amplification for the cry20 gene.