Bio-efficacy of Different Insecticides Against Thrips (Scirtothrips dorsalis Hood) in Green Gram

Investigation on the management of thrips, Scirtothrips dorsalis Hood infesting green gram was carried out under field condition during 2017 at Pulse Research Station, Junagadh Agricultural University, Junagadh, India. For the management of thrips, different combinations of seed treatments viz., imidacloprid 30.5 SC @ 0.12%, clothianidin 50 WDG @ 0.20% and thiamethoxam 25 WG @ 0.01% and foliar application of insecticides profenophos 40% + cypermethrin 4% 44 EC @ 0.044%, spinosad 45 SC @ 0.0135% and flonicamid 50 WG @ 0.015% were evaluated against the pest. Based on pooled over periods, seed treatment of thiamethoxam 25 WG @ 0.10% and insecticidal spray of spinosad 45 SC @ 0.0135% was found most effective for the control of thrips.The highest (1066 kg /ha) seed yield was gained from the plots treated with thiamethoxam 25 WG @ 0.10% + spinosad 45 SC @ 0.0135% followed by imidacloprid 30.5 SC @ 0.12% + spinosad 45 SC @ 0.0135% (1025). Maximum yield loss can be avoided with spray application of thiamethoxam 25 WG @ 0.10% + spinosad 45 SC @ 0.0135% (90.64%) followed by imidacloprid 30.5 SC @ 0.12% + spinosad 45 SC @ 0.0135%(83.16%) as compared to control.