EVALUATION OF NEW GENERATION Bt GENOTYPES, SUSTAINABILITY OF Cry PROTEIN EXPRESSION, COMPUTATION OF ETL, EFFECT ON APHID PREDATORS AND DEVELOPMENT OF IPM MODULE FOR Bt COTTON UNDER RAINFED CONDITIONS
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Date
2007-08-29
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University of Agricultural Sciences GKVK, Banglore
Abstract
Investigations were carried out on different sustainability aspects of Bt cotton
genotypes, during 2004-05 and 2005-06 at Agricultural Research Station, Dharwad. New
generation Bt cotton MRC-7201 with crylAc -I- crylab genes (BG-U) found to be best
against bollworms. Under unprotected conditions the incidence of Helicoverpa annigera
(Hubner) was 0.13 larva / plant in MRC-7201 (BG-U) with 5.05 per cent damage which
was on par with MRC-6322 Bt (BG-II). RCH 368 Bt was better than others with crylAc
gene and was at par with RCH-2 Bt. Interspecific Bt hybrids with crylAc RCH-708 and
MRC-6918 were better over DCH-32.
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