National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Two field experiments were conducted during Kharif, 2018 and 2019 to evaluate the efficacy of green insecticides against gram podborer, Helicoverpa armigera (Hubner) in pigeonpea in comparison with the sequential application of chemical insecticides. Among the green insecticides tested, Bacillus thuringiensis var.kurstaki @ 1 g/ litre was found to be effective in minimizing the larval population of H. armigera in both the seasons tested. The reduction in larval population resulted in the lowest mean per cent pod damage (23.67) with 47.90 per cent reduction and recorded the highest grain yield of 910.8 kg per ha with a yield increase of 39.1 per cent over untreated check. However, when compared with the sequential application of insecticides viz., Chlorantraniliprole 18.5 SC 30 g a.i per ha followed by Flubendiamide 480 SC @ 30 g a.i per ha and Deltamethrin 2.8 EC@ 12.5 g a.i per ha the efficacy proved to be second effective treatment which recorded the lowest larval population lead to the lowest mean pod damage per cent with increased grain yield of 1145.7 kg per ha.
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