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Bio-efficacy of the Combination Product Emamectin benzoate 4% + Alfamethrin 9% against Tomato Fruit Borer (Helicoverpa armigera Hübner) (Noctuidae: Lepidoptera) and their Safety to Natural Enemies

Author: N. Aswathanarayana Reddy, Raghunatha, R., B. Subramanyam, Ramachandra R.K. and Manjunathareddy T.B.

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Abstract

Tomato (Solanum lycopersicum) is one of the most important and remunerative vegetable crops grown around the world for fresh market and processing. Tomato is plagued with several insect pests mainly due to the tenderness and softness as compared to other crops and devastated by an array of pests. Of which, the fruit borer (Helicoverpa armigera Hübner) is the polyphagous pest causes considerable losses in quantity as well as the quality of tomato fruits. Hence the field experiment was conducted to determine the bio-efficacy of combination product Emamectin benzoate 4% + Alfamethrin 9% against tomato fruit borer and its safety to natural enemies at Horticultural Research and Extension Centre, Hogalagere during 2019-20. The results revealed that the treatment emamectin benzoate 4% + alfamethrin 9% @1000 ml/ha was found superior in reducing the H.armigera population and increased marketable fruit yield in tomatoes, which was followed by the treatment emamectin benzoate 4% + alfamethrin 9% @ 500 ml/ha and emamectin benzoate 5SG @ 220g/ha. Emamectin benzoate is one of the microbial origin insecticide molecule produced by the fermentation of the soil actinomycete, Streptomyces avermitilis, and is safer to non target organisms. Hence, the tested combination product emamectin benzoate 4% + alfamethrin 9% was found to be non-toxic to important predators like Menochilus sexmaculatus, Bracon sp., and Chrysoperla carnea at all the concentrations.

Keywords

alfamethrin, bio-efficacy, emamectin benzoate, fruit borer, Helicoverpa armigera, natural enemies, tomato

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How to cite this article

N. Aswathanarayana Reddy, Raghunatha, R., B. Subramanyam, Ramachandra R.K. and Manjunathareddy T.B. (2023). Bio-efficacy of the Combination Product Emamectin benzoate 4% + Alfamethrin 9% against Tomato Fruit Borer (Helicoverpa armigera Hübner) (Noctuidae: Lepidoptera) and their Safety to Natural Enemies. Biological Forum – An International Journal, 15(6): 565-572.