Evaluation of newer acaricides against yellow mite <em>polyphagotarsonemus latus</em> (Banks) on Bt cotton.

Abstract

Field trial was conducted for two consecutive years during kharif 2017 and 2018 at farmer`s field, Kadarmandalagi by using randomized block design (RBD). In both years, among the 12 treatments including untreated plot tested against yellow mite stages indicated that lowest mean population of yellow mite egg and active stages recorded in spiromesifen 280 SC @ 100 g.a.i/ ha and propargite 57 EC @ 570 g.a.i/ ha treated plots followed by diafenthiuron 50 WP @ 400 g.a.i/ ha and fenazaquin 10 EC @ 125 g.a.i/ ha. However, among the chemicals, predatory mite activity noticed more in bifenthrin 10 EC @ 80 g.a.i/ ha treated plot followed by buprofezin 25 SC @ 150 g.a.i/ ha treated plot. Seed cotton yield revealed that the treatment with propargite 57 EC @ 570 g.a.i/ ha recorded highest yield and net returns (26.99 q/ ha and 110348 Rs/ ha) and significantly superior compared to other treatments.