Trends in Biosciences

The field experiment for evaluation of efficacy of biorational insecticides against major pod borers (gram pod borer, plume moth and pod fly) in pigeonpea was carried out at MARS, UAS Dharwad during 2011–12 and 2012–13. The results revealed that the treatment sequence comprising of nimbecidine 0.03 EC (3ml/l), HaNPV (250 LE/ha) and flubendiamide 480 SC (0.1 ml/l) was found promising against gram pod borer by recording least pod damage (21.33 and 19.52%) during both the years of study. The same treatment was found very effective in increasing the grain yield (888 kg/ha) of pigeonpea and recorded highest B:C ratio (1.89). Similarly the pod damage by plume moth and pod fly was lowest in the sequence, nimbecidine 0.03 EC (3ml/l)-Beauveria bassiana (2x10⁸ spores/g) (2g/l)-flubendiamide 480 SC (0.1 ml/l). The foregoing study indicated that these treatments can be incorporated in the management of pod borers and for harnessing higher yields in pigeonpea ecosystem.