BIO-EFFICACY OF SOME NEW INSECTICIDES AGAINST MUSTARD APHID, LIPAPHIS ERYSIMI KALT. (HEMIPTERA: APHIDIDAE) ON INDIAN MUSTARD

Abstract

Field experiment was conducted at CCS Haryana Agricultural University, Hisar, Haryana during Rabi seasons of the year 2012-13 and 2013-14 to evaluate the bio-efficacy and economics of some new insecticides against mustard aphid, Lipaphis erysimi Kalt. on Indian mustard. The aphid incidence at 10 days after treatment indicated that imidacloprid 17.8 SL @ 20 g a.i. per ha (0.70 aphids /10 cm main apical shoot & 97.88 per cent reduction over control) was most effective among all the tested treatments followed by thiamethoxam 25 WG @ 25 g a.i. per ha (0.90 aphids /10 cm main apical shoot & 97.27 per cent reduction over control) and dimethoate 30 EC @ 300 g a.i. per ha (1.10 aphids /10 cm main apical shoot & 96.67 per cent reduction over control). Thus Imidacloprid spray resulted into 97.88% reduction in aphid population over control followed by thiamethoxam, dimethoate and fipronil with 97.27, 96.67 and 95.45 per cent reduction in aphid population over control respectively. The maximum seed yield of 1630 kg/ha was recorded in imidacloprid, which remained on par with thiamethoxam (1620 kg/ha) and dimethoate (1615 kg/ha). The lowest seed yield was obtained from untreated plots (1370kg/ha).