Efficacy of chemical and botanical insecticides against tobacco caterpillar, Spodoptera litura (Fabricus) in soybean
DOI:
https://doi.org/10.48165/jefa.2024.20.1.32Keywords:
Tobacco caterpillar, JS-335, insecticide, yield, benefit cost ratioAbstract
The field trial was conducted at Soybean Research Farm of Birsa Agricultural University, Ranchi during Kharif season of 2021 and 2022 using variety JS-335. Results revealed that two foliar sprays applied at 35 and 50 days after sowing with Chlorantraniliprole (10 %) + Lambda cyhalothrin (5%) ZC (Ampligo 150 ZC) @ 200 ml ha-1 recorded lowest cumulative mean larval population of tobacco caterpillar i.e., 1.48 and 2.22 larvae per meter row length (mrl) during 2021 and 2022, respectively. The next best treatments were biological insecticides viz., emamectin benzoate 5 SG @ 15 g ha-1 (1.68 and 2.33 larvae mrl-1) and spinosad 45 SC @ 75 g ha-1 (2.22 and 2.41 larvae mrl-1) with less larval population during 2021 and 2022, respectively. The treatment Chlorantraniliprole (10 %) + Lambda cyhalothrin (5%) ZC (Ampligo 150 ZC) @ 200 ml ha-1 also recorded highest mean seed yield (1915.5 kg ha-1) and highest benefit cost ratio (4.63).
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References
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