Effect of insecticides against major sucking pests of Green gram in Coastal Odisha

During kharif, 2013, highest percentage reduction (84.2%) in aphid population over control was observed in treatments with thiamethoxam @ 0.3g/L followed by thiamethoxam @ 0.2g/L (83.5%) and clothianidin @ 0.1g/L (83.5%). During kharif, 2014, similar trend was observed with lowest aphid infestation in thiamethoxam @ 0.3g/L with 91.0% reduction over control. During kharif, 2013 at 3 DAS, 71.4% reduction of the white fly population was marked in acetamiprid @ 0.3g/L followed by acetamiprid @ 0.2g/L (70.6%) and thiamethoxam @ 0.3g/L (68.8%). Similar trend of efficacy was found during kharif, 2014. Thrips was managed most effectively by thiamethoxam @ 0.3g/L followed by acetamiprid @ 0.2g/L at 3 days after spray. The intensity of infestation by sucking insect pests was very low in the seed treatment plots up to 30 DAS as compared to other treatments revealed the effectiveness of seed treatment with imidacloprid 70WS @ 5g/kg in green gram. In both the seasons, highest yield (7.90q/ha) was obtained in thiamethoxam @ 0.3g/L treated plots as compared to 5.85q/ha in untreated control plot. The seed treatment with imidacloprid @ 5g/kg along with one foliar spray of thiamethoxam @ 0.3g/L at flower initiation stage may be considered as an effective plant protection schedule for management of major sucking pests and achieving higher yield in mung bean.