Abstract

BIO-EFFICACY OF CERTAIN BOTANICAL AND BIO-RATIONAL PESTICIDE AGAINST TOMATO FRUIT BORER [HELICOVERPA ARMIGERA HUB.]

Manisha Gupta, K. L. Paikra and Prof. R. K. Singh*

Abstract

A field experiment was conducted to study the efficacy of certain botanical and bio- rational pesticides against fruit borer [Helicoverpa armigera Hub.] on tomato. The experiment was conducted during the Rabi season 2017-18 at Gram Post Sukhari Sapna, Tahsil - Ambikapur (C.G.). Total two sprays were applied to protect the crop from H.armigera with three replications Neem Oil 5 ml/lit, Neem Seed Karnel Extract 5 ml/lit, Nimbicide 0.30ppm, Neem Leaf Extract 5ml/lit, HaNPV 1.5ml/lit, Bacillus thuriengiensis 2gm/lit,were evaluated against Helicoverpa armigera infesting Tomato. The observations on infestation of Helicoverpa armigera 3, 7 and 14 days after treatment (Post-treatment) at each spraying were recorded for computing the percent infestation reduction. The data were subjected to statistical analysis after appropriate transformation for interpretation. The treatment with recommended pesticide Neem Seed Karnel Extract was of the most effective treatment followed with and Nimbicide, Neem Leaf Extract, HaNPV, Neem Oil and Bacillus thuriengiensis Among the treatments the highest cost benefit ratio (C: B) of 1:18.51 was obtained with of Neem Seed Karnel Extract.

Keywords: Efficacy, Bio-rational pesticides, Helicoverpa armigera Hub. Cost benefit ratio.