Evaluation of potency of some insecticidal treatment schedule against Myzus persicae incidence on Potato

Potency of some insecticidal treatment schedules, viz T1 (spiromesifen + spiromesifen), T2 (thiamethoxam + thiamethoxam), T3 (thiacloprid + thiacloprid), T4 (imidacloprid+ imidacloprid), T5 (cartap hydrochloride + cartap hydrochloride), T6 (chlorpyriphos + chlorpyriphos) and T7 (untreated control) were evaluated against Myzus persicae (Sulzer) on potato variety, Kufri Jyoti for two potatogrowing years in 2017-2018 and 2018-2019. Among the seven different treatments, two foliar sprays of thiamethoxam 25 WG @125 g a.i/ha after emergence followed by second spray after 15 days of first spray and two foliar sprays of spiromesifen 240 S.C. @ 96 g a.i./ha after emergence followed by second spray after 30 days of first spray were found most effective in reducing the population of aphids. Cost benefit analysis revealed that T2 was most effective and at par with T1. The effect of thiamethoxam on natural enemies showed least detrimental effect followed by spiromesifen and imidacloprid. After tuberization, highest harvested yield of tuber and highest benefit cost ratio was found in treatment with thiamethoxam (T2) and spiromesifen (T1).