author(s)
MR Misal, BV Patil, SS Gote, Gawande SG and Khaire PB

abstract
Bio-rational studies were carried out for Chrysodeixis acuta in soybean with eight treatments. The results found that, after three sprayings significantly reduction in C. acuta population was found in experimental plots treated with chlorpyriphos 20EC @ 2ml/lit compare to rest of treatments. Simple pooled mean of C. acuta seventh days after sprayings, Chlorpyriphos 20EC @2ml/lit (0.3 larvae/mrl) was statistically superior in controlling C. acuta population and at par with NSKE 5% (0.5 larvae/mrl), Neem oil 5% (0.7 larvae/mrl), Pongamia oil 2% (0.8 larvae/mrl) and mechanical control (1.5 larvae/mrl). Intercrop (Sorghum 2.7 larvae/mrl) found effective in reduction of C. acuta population. It was statistically superior compare to rest of the treatments and at par with Trap crop (Castor 3.5 larvae/mrl). The highest population of C. acuta (3.8 larvae/mrl) was noticed in untreated control.