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

  • J. R. Cobbinah
  • K. Osei-Owusu
Article

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), 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 

Résumé

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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References

  1. Adhikary S. (1981) Results of field trials to control common pests of okra Hibiscus esculentus in Togo by application of crude methanolic extracts of leaves and seed kernels of neem tree. Rev. appl. Ent. Series A. Agric. Vol. 73 No. 2.Google Scholar
  2. Akou-Edi E. (1983) Effects of neem seed powder and oil on Tribolium confusum and Sitophilus zeamais. Proc. 2nd Int. Neem Conf. (Edited by Schmutterer H. and Ascher K. R. S.), pp. 445–451. Rauischholzhausen.Google Scholar
  3. Anonymous (1938) Neem leaves as insecticide. Gold Coast Farmer 6, 190.Google Scholar
  4. Anonymous (1985) Treatment of cabbage and Gboma against pests with neem seed extract. Technical Leaflet Plant Protection (Edited by Plant Protection Directorate) Lome—Cacavel, Togo.Google Scholar
  5. Asante G. I. (1985) The extraction of neem seed oil and the possible use of cake as fertilizer. B.Sc. Dissertation, University of Science and Technology, Kumasi, Ghana. pp. 40–48.Google Scholar
  6. Butterworth J. H. and Morgan E. D. (1971) Investigation of locust feeding inhibition of the seeds of the neem tree, Azadirachta indica. J. Insect Physiol 17, 969–977.CrossRefGoogle Scholar
  7. Dreyer M. (1983) Effects of aqueous neem extracts and neem oil on the main pests of Curcubito pepo in Togo. Proc. 2nd Int. Neem Conf. (Edited by Schmutterer H. and Ascher K. R. S.), pp. 435–443. Rauischholzhausen.Google Scholar
  8. Duker S. (1981) Neem seed extract: Effect on growth and development of Sylepta derogata. B. Sc. Dissertation, University of Science and Technology, Kumasi, Ghana. pp. 13–26.Google Scholar
  9. Larew G. Hiram, Knodel-Montz J. J., Webb R. E. and Warthen J. D. (1985) Liriomyza trifolii (Burgess) (Dip-tera: Agromyzidae) control on chrysanthemum by neem seed extract applied to soil. J. Econ. Ent. 78, 80–84.CrossRefGoogle Scholar
  10. Reddy R. N. S. and Prassad R. (1975) Studies on the mineralisation of urea, coated urea and nitrification inhibitor treated soil. J. Soil Sci. 26, 304–312.CrossRefGoogle Scholar
  11. Redfern R. E., Warthen J. D., Jacobson M. and Stokes J. B. (1984) Antifeeding potency of neem formulations. J. Environ. Sci. Health 4, 477–481.Google Scholar
  12. Saxena R. C, Waldbauer G. P., Liquido N. J. and Puma B. C. (1981) Effects of neem seed oil on the rice leaf folder, Cnaphaloeroeis medinalis. Proc. 1st Int. Neem Conf., (Rottach-Egern 1980), pp. 189–204.Google Scholar
  13. Saxena R. C, Justo H. D. and Epino P. B. (1983) Evalu-ation and utilisations of neem cake against the brown planthopper, Nilaparvata lugens. Proc. 2nd Int. Neem Conf. (Edited by Schmutterer H. and Ascher K. R. S. pp. 391–402. Rauischholzhausen.Google Scholar
  14. Jacobson M., Stokes J. B., Warthen Jr. J. D., Redfern R. E., Reed D. K., Webb R. E., Telek L. (1983) Neem Research in the U.S. Department of Agric; An update. Proc. 2nd Int. Neem Conf. (Edited by Schmutterer H. and Ascher K. R. S.) pp. 31–42. Rauischholzhausen.Google Scholar
  15. Jotwani M. G. and Srivastava K. P. (1983) A review of neem research in India in relation to insects. Proc. 2nd Int. Neem Conf. (Edited by Schmutterer H. and Ascher K. R. S.) pp. 43–56. Rauischholzhausen.Google Scholar
  16. Zehrer W. (1983) The effect of the traditional preservation used in Northern Togo and neem oil for control of storage pests. Proc. 2nd Int. Neem Conf. (Edited by Schmutterer H. and Ascher K. R. S.), pp. 453–460. Rauischholzhausen.Google Scholar

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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