STUDIES ON PERFORMANCE OE Bt COTTON GENOTYPES AND EVALUATION OE REFUGE CROPS/CROPPING SYSTEMS
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Date
2007-10-01
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University of Agricultural Sciences GKVK, Banglore
Abstract
Two field experiments were conducted at Main Agricultural Research Station,
University of Agricultural Sciences, Dharwad during the years 2003-04 and 2004-05, to
assess the performance of Bt transgenic genotypes and to identify the suitable refuge
crops/cropping systems in Bt cotton cultivation. The experiment entitled "Performance of
Bt transgenic genotypes" was laid out in randomized complete block design with eight
cotton genotypes (MECH-12 Bt, MECH-162 Bt, MECH-184 Bt, RCH-2 Bt, RCH-20 Bt,
RCH-i44 Bt, DHH-11 and Sahana) as treatments with three replications. Another
experiment entitled "Studies on management of Bt cotton through refuge crops /
cropping systems" was laid out in randomized complete block design with six cropping
systems (100% Bt cotton, 80% Bt cotton, Bt cotton + 20% non Bt cotton, 80% Bt cotton
+ 20% marigold-chickpea, 80% Bt cotton + 20% Okra-chickpea, 80% Bt cotton + 20%
chilli and 80% Bt cotton + 20% pigeonpea) as treatments with four replications in
replacement series.
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