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Evaluation of some neem products as feeding deterrents against the larvae of cabbage butterfly, Pieris Brassicae L.

Published online by Cambridge University Press:  19 September 2011

S. S. Bhathal
Affiliation:
Department of Entomology, Punjab Agricultural University Ludhiana-141004 (pb.), India
Darshan Singh
Affiliation:
Department of Entomology, Punjab Agricultural University Ludhiana-141004 (pb.), India

Abstract

Feeding deterrency tests by leaf disc dipping method revealed AZT-VR/K extract of azadirachtin as the most potent antifeedant against cabbage butterfly, Pieris brassicae L. larvae. The leaf damage on treatment with the extract (at 3, 2 and 1%) was minimum and ranged between 4.9 and 16.3 % as compared to 98 % in untreated check. High level of feeding deterrency was exhibited at all the concentrations of AZT-VR/K, while in neemark (at 1%) and neem oil (at 2 and 1%), the deterrent effects declined considerably on their decreased concentrations.

Résumé

Des tests d'effet dissuassif par la méthode d'immersion de disques foliaires ont démontré que l'extrait d'azadirachitine AZT-VR/K était l'agent dissuasif le plus efficace centre les larves de Pieris brassicae L.

Les dégradations foliaires après traitement avec l'extrait (aux taux respectifs de 3, 2 et de 1%) sont réduites au minimum et s'échelonnent entre 4, 9 et 16, 3 comparés à 98% pour le témoin non traité.

Le haute niveau d'efficacité dissuasive est démontré à toutes les concentrations d'AZT-VR/K, alors qu'avec l'utilisation d'écorce de neem (Azadirachta indica) (à 1 %) ou d'huile de neem (à 2 et 1%), l'effet dissuasif décroît considérablement lorsque les concentrations diminuent.

Type
Research Articles
Copyright
Copyright © ICIPE 1993

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References

Broughton, H. B., Ley, S. V., Slavin, A. M. Z., Williams, D. J. and Morgan, E. D. (1986) X-ray crystallographic structure determination of detigloyldihydroazadirachtin and reassignment of the structure of the limonoid insect antifeedant azadirachtin. J. Chem. Soc, Chem. Commun. 1365, 4647.CrossRefGoogle Scholar
Klocke, J. A. (1989) Plant compounds as sources and models of insect control agents. In Economic and Medicinal Plant Research (Edited by Wagner, H., Hikino, H. and Farnsworth, N. R.), Vol.3, pp. 103144. Academic Press, London.CrossRefGoogle Scholar
Sandhu, G. S. and Singh, D. (1975) Studies on antifeedant and insecticidal properties of neem, Azadirachta indica A. Juss and dharek, Melia azadirach Linn, kernel/fruit powders to Pieris brassicae. L. larvae. Indian J. Plant. Prot. 3, 177180.Google Scholar
Saxena, R. C. (1987) Antifeedants in tropical pest management. Insect Sci. Applic. 8, 731736.Google Scholar

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Evaluation of some neem products as feeding deterrents against the larvae of cabbage butterfly, Pieris Brassicae L.
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