Vol. 9, Issue 12, Part D (2025)

Field evaluation was carried out to determine the bio-efficacy of newer combination insecticide against major sucking pests in cotton, a field study was undertaken at College of Agriculture, Raichur, University of Agricultural Sciences, Raichur during 2022-23. Totally two sprays were under taken at different intervals by using six different insecticides. Population of whiteflies and mites were observed at pre and three, seven and fourteen days after each spray. In both the sprays evidenced the superiority of Fenazaquin 10 EC + Bifenthrin 4 EC @ 156.5 + 62.6 g a.i./ha by recording least number of whiteflies (2.77/3 leaves) and mites (1.92/cm. sq) population at fourteen days after second spray with percent reduction over control of 75.05 and 89.80 respectively followed by next lower dosage treatments and standard checks. Among the treatments, highest seed cotton yield of 26.52 q/ha was recorded in the highest dosage of Fenazaquin 10 EC + Bifenthrin 4 EC @ 156.5 + 62.6 g a.i./ha and was on par with Fenazaquin 10 EC + Bifenthrin 4 EC @ 125 + 50 g a.i./ha recorded 25.72 q/ha. Percent increase in yield over control in the treatment Fenazaquin 10 EC + Bifenthrin 4 EC @ 156.5 + 62.6 g a.i./ha was 35.71.