ACARICIDAL MANAGEMENT OF YELLOW MITE, POLYPHAGOTARSONEMUS LATUS BANKS INFESTING CHILLI (CAPSICUM ANNUM L.)
RABINDRA PRASAD *
DEPARTMENT OF ENTOMOLOGY, BIRSA AGRICULTURAL UNIVERSITY, KANKE, RANCHI-834 006, INDIA.
JANARDAN SINGH *
DEPARTMENT OF ENTOMOLOGY AND AGRICULTURAL ZOOLOGY, INSTITUTE OF AGRICULTURAL SCIENCES, BANARAS HINDU UNIVERSITY, VARANASI-22l 005, INDIA*.
*Author to whom correspondence should be addressed.
Abstract
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 efficacy and economics of certain pesticides against the yellow mite, Polyphagotarsonenzus 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 ccl 1700 ml/ha in reducing the incidence of the mite. As such. thiodicarb 75 WP 625 and 1000g/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 (CBR) of 1:9.26 and 1:11.58 respectively. However. dicofol 18.5 EC applied (d, 1700 ml/ha realized maximum suppression of the mite incidence NA hich in turn gave rise to the highest yield of 78.97 kg/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.
Keywords: Chilli, Polyphagotarsoneinus latus,, pesticides, acaricidal efficacy., economics, net profit.