Evaluation of bio-rational and reduced-risk insecticides for managing pod borer complex in pigeonpea
DOI:
https://doi.org/10.48165/jefa.2026.21.1.13Keywords:
Pigeonpea, pod borer, Bacillus thuringiensis, Flubendiamide.Abstract
Eight treatments comprising of two bio-pesticides, i.e., Azadirachtin 0.15% @ 1.5 l ha-1 and Bt @ 1 kg ha-1 alone or their combination with different insecticides viz., Flubendiamide 480 SC @ 200 ml ha-1, Spinosad 45 SC @ 200 ml ha 1 and Emamectin benzoate 5 SG @ 200 g ha-1 along with an untreated control, were evaluated against pod borers in medium duration pigeonpea variety BRG 2. The spraying of the treatments was done once at 50 per cent flowering on appearance of pod borers. Among the treatments, supremacy of Bt @ 1 kg ha-1 + Flubendiamide 480 SC @ 200 ml ha-1 was observed with a record of 0.54-1.82 nos. of larva per twig as against 3.51-5.08 nos. of larvae per twig in untreated control, i.e., highest (75.16%) reduction in larval population over control. The treatment Bt @ 1 kg ha-1 was found to be relatively safer molecule to natural enemies in comparision to other molecules (1.86 nos. per twig) over control. Lowest pod damage at harvest (4.39%), and highest pigeon pea seed yield (21.55 q ha-1) were recorded in Bt @ 1 kg ha-1 + Flubendiamide 480 SC @ 200 ml ha-1, which was significantly higher than all other treatments including control (8.94 q ha-1). The said treatment was also outshined as the most economic treatment with highest B:C ratio of 2.96 and highest net return of Rs. 80976/- ha-1.Downloads
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