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Year: 2016, Issue: June
Efficacy of insecticide and plant product against the incidence of defoliators and stem borer in soybean.
S. S. Yadav, M. K. Nayak, D. S. Tomar and A. K. Srivastava
Soybean, Insect pests, Insecticide, Plant product.
An experiment was conducted during kharif-2012 on soybean crop to test the bio-efficacy of insecticides and plant products against defoliators and stem borer. The results revealed that Indoxacarb 14.5 SC (0.012%) proved to be the most effective. Lambda-cyhalothrin 5 EC (0.0025%) has more efficient against tobacco caterpillar followed by Indoxacarb 14.5 SC (0.012%) and NSKE (5%). While the effectiveness against semilloper of Indoxacarb 14.5 SC (0.012%) proved to be more followed by cypermethrin 10 EC (0.05%), whereas in case of girdle beetle Trizophos 40 EC (0.05%) proved to be most effective followed by cypermethrin 10 EC (0.01%). However, the plant product, tobacco leaf extract (2%) and Azadirachtin 0.15 EC (0.15%) proved to be least effective. The highest cost: benefit ratio was obtained in Lamda-cyhalothrin 5 EC (1: 23.67) which proved to be the most effective followed by cypermethrin 10 EC (1:18.52) and trizophos 40 EC (1:14.98), whereas lowest C:B ratio was recorded in NSKE (1:7.25). The seed yield 2763 kg/ha was recorded with application of Indoxacarb 14.5 SC which was 726 kg (35.64%) more than the control. Other treatments gave additional yield ranging from 2353 to 2753 kg/ha.
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