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Effects of Neem Seed Extracts on Insect Pests of Eggplant, Okra and Cowpea

Published online by Cambridge University Press:  19 September 2011

J. R. Cobbinah  and
K. Osei-Owusu
J. R. Cobbinah
Affiliation:
Forest Products Research Institute, UST, Kumasi, Ghana
K. Osei-Owusu
Affiliation:
Forest Products Research Institute, UST, Kumasi, Ghana
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Abstract

Field trials of various neem formulations were conducted to determine their effectiveness for the control of some major pests of eggplant, Solanum melogena (L), okra, Hibiscus esculentus (L) and cowpea, Vigna unguiculata (L), Walp. Various concentrations of neem emulsion reduced incidence of Selepa docilis (Butler), Urentius sp. and Zonocerus variegatus (L), on eggplant. Damage caused by Sylepta derogata (F), defoliator of okra, was less in plots treated with 5, 10 and 20% aqueous-methanol extracts of defatted neem cake. Moreover, neem seed cake applied as dust enhanced cowpea yield.

Résumé

Des essais de champs des divers formulations de neem ont été essayés à fin de determiner leurs efficacités d'elimination des insects nuisibles d'une importance majeure d'aubergine, Solanum melogena (L), Hibiscus esculentus (L) et de l'haricot, Vigna unguiculata (L) Walp. Des concentrations divers d'emulsion de neem ont réduit la fréequence de Selepa docilis (Butler), Urentius sp et Zonocerus variegatus (L) sur l'aubergine. Les dégats qui ont été produits par Sylepta derogata (F), le défoliant de okra était moins sur les champs fraits à 5%, 10% et 20% des extraires d'alcool aqueux (methane) sans graisse de neem. Le gateau de la graine de neem appliquée comme la poussière a augmentér le rendement d'haricot (cowpea).

Keywords

Defatted neem cakeresurgencepolyphagousnitrification inhibitoremulsionsystemic translocationLe gateau de neem sans graissela réapparitionpolyphagenitrification inhibiteurL'émulsionsystème translocation
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 5 , October 1988 , pp. 601 - 607
Copyright
Copyright © ICIPE 1988

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References

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