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VOL. 7, ISSUE 3 (2025)
Efficacy of commonly used insecticides against shoot and fruit borer (Earias vittella) on pgpr treated okra plants
Authors
RA Maheerthanan, M Ravi , A Sowmiya, B Jeberlin Prabina G Preetha
Abstract
A field experiment was conducted at the
Agricultural College and Research Institute, Killikulam, during Kharif 2021 to
evaluate the efficacy of commonly used insecticides against Earias vittella
on Bacillus subtilis Bbv57-treated okra plants. The study involved ten
treatments, including PGPR (B. subtilis Bbv57) application alone and in
combination with insecticides such as Spinetoram, Spinosad, and Emamectin
Benzoate, along with an untreated control. Results demonstrated that foliar
application of spinetoram 11.7 SC @ 450 ml/ha on B. subtilis
Bbv57-treated plants was the most effective, achieving the lowest shoot damage
(2.94% at 14 DAT) and fruit damage (4.79% pooled), alongside the highest fruit
yield (19.31 t/ha) and benefit-cost ratio (BCR 1:2.56). Spinosad 45 SC @ 160
ml/ha also showed significant efficacy, reducing fruit damage and increasing
yield (18.77 t/ha). The enhanced efficacy of insecticides reveals the potential
of integrating PGPR with chemical insecticides to reduce pest infestation,
minimize chemical pesticide use, and mitigate environmental risks.
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Pages:28-32
How to cite this article:
RA Maheerthanan, M Ravi , A Sowmiya, B Jeberlin Prabina G Preetha "Efficacy of commonly used insecticides against shoot and fruit borer (<i>Earias vittella</i>) on pgpr treated okra plants". International Journal of Agriculture and Plant Science, Vol 7, Issue 3, 2025, Pages 28-32
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