Comparative performance of Bt cotton hybrid, MECH 162, against non Bt cotton cultivars under different agro ecological situation of Marathwada region

摘要

Performance of Bt cotton hybrid, MECH 162, was studied in comparison with non Bt (Gossypium arboreum and intra hirsutum hybrid) cultivars under six agro ecological situations of rainfed ecosystem of Marathwada region during 2002-03 and 2003-04. In general, MECH 162 was found superior in yield under most of the agro ecological situations. However, losses in yield in case of non-Bt cotton varieties varied under different situations. Under S_1 (deep soil + high rainfall) and S_3 (medium soil + high rainfall) situations, losses were relatively less ranging from 9.9 to 29.1 per cent whereas losses were on higher side ranging form 24.8 to 54.6 under S_4 (medium soil + low rainfall), S_5 (shallow soil + high rainfall) and S_6 (shallow soil + low rainfall)sitations. In general, losses were less in G. arboreum varieties under most of the agrological situations as compared to intra-hirustum hybrid.