author(s)
Snigdha Bhattacharjee, Sahidur Rahman and Sudhansu Bhagawati

abstract
An experiment was carried out to evaluate the efficacy of seven acaricides against yellow mite Polyphagotarsonemus latus (Banks) in chilli during 2013, at the Department of Entomology, Jorhat, Assam. All the seven acaricides tested were significantly superior in controlling P. latus as compared to the untreated control. The highest reduction of the mite was obtained with fenpyroxymate 5 SC @ 30 g.a.i/ha (100%) up to 14th day after second spraying and was at par with ethion 50 EC @ 500 g.a.i/ha (96.90%), profenofos 50 EC @ 500 g.a.i/ha (96.88%), etoxazole 10 SC @ 40 g.a.i/ha (95.77%), spiromesifen 240 SC @ 240g.a.i/ha (93.26%), and fenazaquine 10 EC @ 125 g.a.i/ha (92.35%). On the other hand propargite 57 EC @ 570 g.a.i/ha registered the lowest reduction of mite population i.e. (63.16%) as compared to other acaricides. The highest mean yield of 5681.8 kg/ha was obtained from fenpyroxymate 5 SC @ 30 g.a.i/ha treated plots and lowest yield of 909.09 kg/ha was obtained from control plots. The benefit cost ratio was worked out and fenpyroxymate registered the highest benefit cost ratio of 5.76 over the control. Hence considering the control of mites and benefit-cost ratio fenpyroxymate 5 SC @ 30 g.a.i/ha was the best treatment against yellow mite, P. latus in chilli.