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

  • J. R. Cobbinah
  • K. Osei-Owusu


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), Urenlius 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.

Key Words

Defatted neem cake resurgence polyphagous nitrification inhibitor emulsion systemic translocation 


Des essais de champs des divers formulations de neem ont été essayés à fin de determiner leurs efficacités d’élimination 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 fréquence 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 appliqué comme la poussière a augmentér le rendement d’haricot (cowpea).

Mots Cléfs

Le gateau de neem sans graisse la réapparition polyphage nitrification inhibiteur L’émulsion système translocation 


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Copyright information

© ICIPE 1988

Authors and Affiliations

  • J. R. Cobbinah
    • 1
  • K. Osei-Owusu
    • 1
  1. 1.Forest Products Research Institute, USTKumasiGhana

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