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Efficacy of Aqueous Neem Extracts in the Control of Diamondback Moth, Plutella xylostella (L.) on Cabbage

  • I. Javaid (a1), N. Saifudine (a1), L. Tombolane (a1) and E. Rafael (a1)
Abstract

The effectiveness of aqueous neem leaf and seed extracts for the control of the diamondback moth (DBM), Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae) on cabbage was evaluated in field tests at Chokwe, Mozambique and compared with parallel dimethoate + cypermethrin treatments. All the neem treatments recorded significantly higher yield of marketable heads of cabbage and significantly better control of diamondback moth than the commonly used mixture of pyrethroids or the untreated control. The neem seed extracts provided the best control of DBM. The possibility of using neem extracts as part of an integrated pest management system for DBM control in smallholder farms is discussed.

A Chokwe au Mozambique, des extraits en solutions aqueuses de feuilles et de fruits de nime ont étee testés pour évaluer leur efficacité de lutte contre la teigne Plutella xylostella (Lepidoptera: Plutellidae) sur le chou en champs, et ils étaient parallèlement comparés aux traitements habituels contre la teigne par utilisation de diméthoate + cyperméthrine. On a enregistré des rendements hautement significatifs en pommes commercialisables de chou pour tous les traitements aux extraits de nime, et un meilleur moyen de contrôle de la teigne par rapport au mélange courante de pyréthroïdes et au témoin absolu. L'article discute des possibilités d'utilisation des extraits de nime en tant qu'une composante du système de lutte intégrée contre la teigne, chez les petits fermiers.

Copyright
COPYRIGHT: © ICIPE 2000
References
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Adhikary, S. (1985) Results of field trials to control the diamondback moth, Plutella xylostella L., by application of crude methanoic extracts and aqueous suspension of seed kernel and leaves of neem, Azadirachta indica A. Juss, in Togo. Z. Ang. Entomol. 100, 27–33.
Ermel, K., Pahlich, E. and Schmutterer, H. (1987) Azadirachtin content of neem kernels from different geographical locations, and its dependence on temperature, relative humidity, and light, pp. 171–184. In Natural Pesticides from the Neem Tree and Other Tropical Plants (Edited by Schmutterer, H. and Ascher, K. R. S.). Proceedings of Third International Neem Conference, 10–15 July, 1986, Nairobi, Kenya. GTZ, Eschborn, Germany.
Kfir, R. (1996) Diamondback moth—Natural enemies in South Africa. Plant Protection News 43, 20–21.
Kirsch, K. (1987) Studies of the efficacy of neem extracts in controlling major insect pests in tobacco and cabbage, pp. 495–515. In Natural Pesticides from the Neem Tree and Other Tropical Plants (Edited by Schmutterer, H. and Ascher, K. R. S.). Proceedings of Third International Neem Conference, 10–15 July, 1986, Nairobi, Kenya. GTZ, Eschborn, Germany.
Przybyszewski, J. (1993) The use of neem seed and leaf extracts to control lepidopteran pests of cabbage in Kaedi, Mauritania, West Africa. Tropical Science 33, 217–225.
Segeren, P., van den Oever, R. and Compton, J. (1994) Pragas, Doencas e Ervas Danninhas nas Culturas Alimentares in Mocambique. GTZ, CTA. Instituito Nacional de Investigacao Agronomica, Ministerio de Agricultura. 258 pp.
Vollinger, K. (1987) The possible development of resistance against neem seed kernel extract and deltamethrin in Phitella xylostella, pp. 543–554. In Natural Pesticides from Neem Tree and Other Tropical Plants (Edited by Schmutterer, H. and Ascher, K. R. S.). Proceedings of the Third International Neem Conference, 10–15 July, 1986, Nairobi, Kenya. GTZ, Eschborn, Germany.
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International Journal of Tropical Insect Science
  • ISSN: 1742-7584
  • EISSN: 1742-7592
  • URL: /core/journals/international-journal-of-tropical-insect-science
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