Efficacy of spinetoram against green semilooper Chrysodeixis acuta walker infesting soybean

The field efficacy of spinetoram 12SC in two doses i.e. 375 and 450 ml/ha was evaluated along with other insecticides against green semilooper, Chrysodeixis acuta (Walker) infesting soybean during kharif 2011 and 2012. Application of spinetoram 12SC @ 450 ml/ha was found most effective (0.62 larvae/m row length-mrl) followed by 0.73 larvae/mrl with chlorantraniliprole 20SC @ 100 ml/ha and 0.89 larvae/mrl in triazophos 40EC @ 800 ml/ha as compared to untreated control (3.67 larvae/mrl). Maximum seed yield (2143 kg/ha) was obtained with spinetoram 12SC @ 450 ml/ha followed by 1999 kg/ha in triazophos 40EC @ 800 ml/ha and 1978 kg/ha in profenophos 50EC @ 1250 ml/ha as compared to 1495 kg/ha in control.