Assessment of Yield Losses Due to Sucking Pests in BT Cotton

Authors

  • Sukhpreet Kaur Brar Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab
  • H. S. Bhullar Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab

DOI:

https://doi.org/10.55446/IJE.2022.158

Keywords:

Bt, desi, non Bt cotton, avoidable yield losses, Bemisia tabaci, Amrasca biguttula biguttula, Thrips tabaci, seed cotton yield

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%).

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Published

2023-12-01

How to Cite

Brar, S. K., & Bhullar, H. S. (2023). Assessment of Yield Losses Due to Sucking Pests in BT Cotton. Indian Journal of Entomology, 85(4), 1043–1046. https://doi.org/10.55446/IJE.2022.158

Issue

Volume 85, Issue 4, December 2023

Section

Research Communications
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