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Effect of nimbecidine on caterpillar, Diacrisia obliqua (Walker)

Mustaque Mohammad* & S.N.Yadav
Department of Zoology, T.P.College, B.N.Mandal University, Madhepura, Bihar, India
Received : 26th July, 2017; Revised : 21st August, 2017

Abstract: The biological activity of eco-friendly insecticide, nimbecidine was evaluated on the mortality, growth and feeding responses of jute hairy caterpillar, Diacrisia oblique (Walker). The results showed that all the larval instars of jute hairy caterpillar were highly susceptible to nimbecidine and the susceptibility gradually increased with the increase of concentration, exposure time and decreased with the increase of larval age. Growth and feeding responses of jute hairy caterpillar to nimbecidine were assessed. Observation on growth response indicated that nimbecidine prolonged larval and pupal period, reduced larval and pupal weight and also reduced percent pupation. In addition, nimbecidine
also induced morphological abnormalities on survived larvae, pupae and adults. Results on feeding response showed that nimbecidine significantly reduced the food consumption of treated larvae as compared to control. It is clear that nimbecidine possesses insecticidal, growth retardant and antifeedant properties and may be useful in the management of hairy caterpillar.

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