What type of study is this?

This is a Field Experiment study.

September 10, 2025

Management of Lepidopteran Pests of Groundnut through Botanicals

Key Points

Azadirachtin significantly reduced leaf damage from lepidopteran pests in groundnut, improving plant health.
Leaf damage caused by tobacco caterpillar and gram pod borer was reduced from 28.2% and 22.9% to 8.8% and 9.7%, respectively.
The yield achieved with azadirachtin reached 1630 kg wet pods/ha compared to 926 kg for the untreated check.
Five applications of botanical insecticides over 70 days effectively managed pest populations in groundnut.

Abstract

A field experiment was conducted during August 2011 to November 2011 at Thumpaipatti, Madurai to evaluate field efficacy of botanicals and fish oil rosin soap for the management of lepidopteran pests of groundnut. Five rounds of application of six botanical insecticides at ten days interval were made starting from 30 days after sowing up to 70 days and the leaf damage caused by leafminer (Aproaerema modicella Dev.), tobacco caterpillar (Spodoptera litura F.) and gram pod borer (Helicoverpa armigera L.) on groundnut were recorded. Azadirachtin 0.15 EC (Neem Gold @ 1.5 ml/lit.) was effective in reducing leaf damage caused by leafminer, tobacco caterpillar and gram pod borer, recording the mean leaf damages of 8.4, 8.8 and 9.7 per cent as against 25.9, 28.2 and 22.9, respectively, while it was 25.9, 28.2 and 22.9 in untreated check. Azadirachtin recorded the highest yield of 1630 kg wet pods/ha while it was 926 kg wet pods/ha in untreated check.

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