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Vol. 12, Special Issue 11 (2023)

Influence of weather factors on population dynamics of lepidopteran pests of Bt cotton

Author(s):
KV Deshmukh, CS Patil, AR Walunj, RS Wagh, VP Chimote and NK Bhute
Abstract:
The objective of this current study was to document the fluctuation in population of lepidopteran pests in Bt cotton fields and to assess the influence of weather parameters on their population dynamics. The data revealed that during Kharif-2020 and 2021, the presence of Helicoverpa armigera larvae on Bt cotton displayed varying patterns, ranging from 0.16 to 1.08 larvae per plant in 2020 and 0.20 to 1.14 larvae in 2021. The highest incidence occurred in the 37th MW of both years, reaching 1.04 and 1.14 larvae per plant respectively. Similarly, Earias vittella population followed a comparable trend, emerging in the 31st MW and persisting until the 41st MW, with the peak occurrence observed in the 35th MW, recording 1.46 and 1.64 larvae per plant in 2020 and 2021 respectively. Spodoptera litura larval population in 2020 ranged from 0.38 to 2.18 per plant, with the highest incidence in the 37th MW at 2.18 larvae per plant. During Kharif 2021, the range was 0.28 to 2.24 larvae per plant and reached its peak in the 37th MW at 2.24 larvae per plant.
Pages: 09-12  |  136 Views  56 Downloads
How to cite this article:
KV Deshmukh, CS Patil, AR Walunj, RS Wagh, VP Chimote and NK Bhute. Influence of weather factors on population dynamics of lepidopteran pests of Bt cotton. The Pharma Innovation Journal. 2023; 12(11S): 09-12.
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