The Effectiveness and Economics of various Combination Insecticide Formulations against Defoliators and Sucking Pests of Soybean

Author: Saicharan M., Swathi Y., Praveen Kumar G., Sreedhar M. and Balaji Naik B.

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Abstract

The current investigation was carried out at the Regional Sugarcane and Rice Research Station, Rudrur, in the Nizamabad District of Telangana State, with the aim of assessing the effectiveness of various commercially available insecticide combinations against defoliators and sucking pests of the JS-335 Soybean variety. There were eight treatments in all, including the untreated control group. Three replications of each treatment were conducted using a randomized complete block design. When a pest reached the economic threshold, 30 and 50 days after sowing, insecticides were sprayed, and data was collected five and ten days after treatment to compare with pre-treatment pest population data. The results showed that spraying a combination insecticide Chlorantraniliprole 8.8% + Thiomethoxam 17.5% SC @ 500ml ha-1 twice, 30 days and 50 days after sowing, reduced the population of defoliators like Spodoptera litura & Chrysodexis acuta and sucking pests like aphids & whiteflies by 82.13 per cent and 77.10 per cent respectively, over control. Plots treated with the afore mentioned insecticide had a maximum yield of 1328 kg ha-1 and a 1.67 benefit-cost ratio. Following the treatment, a yield and benefit cost ratio of 1192 kg ha-1 and 1.56 were obtained using Emamectin benzoate 3% + Thiomethoxam 12% WG @ 312.5 g ha-1.

Keywords

Soybean, combination insecticides, defoliators, aphids, whitefly, yield and benefit cost ratio

Conclusion

The current study has shown that spraying soybean crops with Chlorantraniliprole 8.8% + Thiomethoxam 17.5% SC @ 500 ml ha-1 twice at 30 and 50 days after sowing has decreased sucking pests like aphids and whiteflies as well as defoliators like Spodoptera litura and Chrysodexis acuta. The highest possible soybean yield with benefit cost ratio of 1.43 was attained. The next effective treatment, Emamectin benzoate 3% + Thiomethoxam 12% WG @ 312.5 g ha-1, has a high B:C of 1.56. Both the treatments Beta-cyfluthrin 8.49 + Imidacloprid 19.81% w/w @ 350 ml ha-1 and Acephate 50% + Imidacloprid 1.8% SP @ 1000 g ha-1 have recoded 1.43 benefit cost ratio.

References

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How to cite this article

Saicharan M., Swathi Y., Praveen Kumar G., Sreedhar M. and Balaji Naik B. (2023). The Effectiveness and Economics of various Combination Insecticide Formulations against Defoliators and Sucking Pests of Soybean. Biological Forum – An International Journal, 15(10): 521-527.