National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Laboratory assays showed that dual toxin Bacillus thuringiensis (Bt) cotton cultivars expressing both Cry 1 Ac and Cry 2 Ab endotoxins (BG-II) were more toxic to Spodoptera litura (Fab.) larvae compared to non Bt cotton. The weight of first, second, third and fourth instar larvae were recorded, which were fed with leaves, squares and bolls of eleven dual toxin Bt cotton cultivars at 60, 75, 90 and 125 days after sowing of the crop. The final weight of each instar was reduced at seven days after release when compared to non Bt cotton cultivars. Reduction in the weight was more in case of first, second and third instars than the fourth instar larvae of S. litura. Hence the BG-II cotton was more toxic to first, second, third instar larvae than fourth instar.
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