Assessment of Yield Losses Due to Sucking Pests in Bt Cotton Brar Sukhpreet Kaur1,*, Bhullar H S1 1Department of Entomology, Punjab Agricultural University, Ludhiana141004, Punjab, India *Email: harpalsinghbhullar@pau.edu (corresponding author)
Online Published on 04 January, 2024. Abstract Field experiment was conducted during kharif 2019 to determine the avoidable yield losses due to sucking insect pests on four cotton cultivars BG II (US 81& RCH 776), non Bt F-2228 and Desi LD 949 at two sowing dates (timely-25th April; and late 27th May) at the Punjab Agricultural University, Ludhiana. Significantly higher incidence of whitefly Bemisia tabaci (Genn.) (20.61 adults), jassid Amrasca biguttula biguttula (Ishida) (12.97 nymphs) and thrips Thrips tabaci (Lindeman) (7.32 adults/ 3 leaves) was observed under late sown conditions, compared to the timely sown one with less incidence- B. tabaci (14.51 adults), A. biguttula biguttula (11.37 nymphs) and T. tabaci (6.58 adults)/ 3 leaves. Significantly less B. tabaci (16.69 adults), A. biguttula biguttula (13.74 nymphs) and T. tabaci (5.86 adults) were observed with desi cotton (LD 949) as compared BG II cultivars (RCH 776, US 81) and non Bt F 2228. Significantly less avoidable yield loss (16.41%) was observed with timely sown crop as compared to 18.45% losses under late sown conditions. Significantly less yield loss was observed in desi cotton (16.01%) as compared to US 81 (16.55%), RCH 776 (17.20) and F 2228 (19.98%). Top Keywords Bt, Desi, Non Bt cotton, Avoidable yield losses, Bemisia tabaci, Amrasca biguttula biguttula, Thrips tabaci, Seed cotton yield. Top |