ACARICIDAL MANAGEMENT OF YELLOW MITE, POLYPHAGOTARSONEMUS LATUS BANKS INFESTING CHILLI (CAPSICUM ANNUM L.)

摘要

An experiment was conducted over the periods of two years in the field of Institute of Agricultural Sciences, Banaras Hindu University, Varanasi to evaluate acaricidal etTicacy and economics of certain pesticides against the yellow mite, Polyphagotarsonemus latus Banks infesting chilli (Var. G4). The overall results revealed that thiodicarb 75 WP @ 625-1000 g/ha proved to be highly effective and on par with dicofol 18.5 EC @ 1700 mi/ha in reducing the incidence of the mite. As such, thiodicarb 75 WP@ 625 and l000g/ha produced substantially higher yield of green chilli fruits of 62.40 and 75.70 q/ha and net monetary returns, NMR, of Rs. 25.385 / ha and Rs. 44.255/ha with cost benefit ratios (GBR) of 1:9.26 and 1:11.58 respectively. However, dicofol18.5 EC applied @ 1700 ml/ha realized maximum suppression of the mite incidence which in turn gave rise to the highest yield of 78.97 kq/ha and NMR of Rs. 49.220/ha with CBR of 1:13.09. The minimum yield of green chilli fruits (43.65 q/ha) was obtained from the unprotected crop. Yield loss varying from 13 to 45 percent caused by P. latus could be avoided by different treatments.