ASSESSMENT OF AVOIDABLE YIELD LOSSES DUE TO LIPAPHIS ERYSIMI KALT. IN VARIOUS SPP.
Department of Entomology, CCS Haryana Agricultural University, Hisar-125004 (Haryana), Regional Research Station, CCS Haryana Agricultural University, Rohtak-124004 (Haryana),
DEEPAK SHARMA , S. P. YADAV AND SUNITA YADAV
Present were conducted during the season of year 2015-16 at Regional Research Station,Â Rohtak (Haryana), India, to assess the yield losses due to mustard aphid in various Brassica B. juncea, B.napus B. rapa) sown under early and late sown conditions. The avoidable losses in terms of seed yield varied from 9.26 to 17.48 per cent, found lowest (9.26%) in HNS 0901 whereas, highest (17.48%) in BSH 1Â under timely sown conditions. These losses ranged from 20.11 to 32.62 per cent under late sown conditions,Â found lowest (20.11%) in HNS 0901 although highest (32.62%) in BSH 1. The avoidable oil content lossesÂ in all three spp. ranged from 3.38 to 6.34 per cent, found lowest (3.38%) in RH 0749 however,Â highest (6.34%) in BSH 1 under timely sown conditions. These losses in oil content varied from 4.92 to 8.14Â percent, lowest (4.92%) in RH 0749 and highest (8.14%) in BSH 1 under late sown conditions.Â Germination percentage was not significantly affected by the mustard aphid in all three Brassica species.