Evaluation of BG-II cotton hybrids against Spodoptera litura (Fab.)

Bioassay of new BG-II cotton hybrids against S. litura revealed that all BG-II cotton hybrids were superior with higher per cent mortality of S. litura as compared to Bt cotton hybrid. RCH-2 BG-II was most promising BG-II cotton hybrid, recording highest per cent mortality of S. litura on leaves (60.42%), squares (59.05%) and young green bolls (45.56%). This was followed by Ankur-3228 BG-II, Ankur-3224 BG-II and IAHH-2 BG-II. The per cent mortality of S. litura was highest at 75 DAS in all the BG-II cotton hybrids. It was decreased thereafter up to 135 DAS. In general per cent mortality was higher on leaves.