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Neem Products for Protecting Field Cassava From Grasshopper Damage

Published online by Cambridge University Press:  19 September 2011

J. I. Olaifa  and
A. O. Adenuga
J. I. Olaifa
Affiliation:
Department of Plant Science, Obafemi Awolowo University, Ile-Ife, Nigeria
A. O. Adenuga
Affiliation:
Department of Plant Science, Obafemi Awolowo University, Ile-Ife, Nigeria
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Abstract

Three neem products—an emulsifiable concentrate of neem oil (NOEC), neem kernel water extract (NKWE) and neem leaf water extract (NLWE)—were applied on field cassava for protection against damage by the grasshopper, Zonocerus variegatus (L.). Three conventional insecticides viz. lindane 0.3%, cypermethrin 0.006% and monocrotophos 0.24% were also compared. All the neem products protected cassava for varying periods. Efficacies of NOEC and NKWE were superior to insecticides. From the results, neem products recommended to check the grasshopper damage were as follows: NOEC 0.5–2% to be applied every 8 days, NOEC 3–4% to be applied every 10 days, NKWE 7–10% to be applied every 12 days, NLWE 50% to be applied every 6 days.

Résumé

Trois produits de neem—une concentré emulsifiable de l'huile (NOEC), l'extrait a l'eau du noyau (NKWE) ainsi que celle de la feciille (NLWE)—ont été appliqués sur le manioc surle champs pour tester sa profection contre le degat cause par la sauterelle Zonocerus variegatus (L). A ces produits ont ete compares trois insecticides conventionnels 0.3% lindane, 0.006% cypermethrin et 0.24% monocrotophos. Tous les produits ont bien protéegé le manioc pendant des periodes variables. L'efficacité de NOEC et de NKWE est superieure a celle des insecticides conventionnels. A partir des resultats obtenus, les produits ainsi que les conditions d'application recommandées pour contrôler les degâts dûs à la sauterelle sont les suivants 0.5–2% NOEC a appliquer tous les huit jours, 3–4% NOEC (tous les dix jours), 7–10% NKWE (tous les douze jours) et 50% NLWE (tous les six jours).

Keywords

NeemZonocerus variegatusgrasshopperNeemZonocerus variegatussauterelle
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 2 , April 1988 , pp. 267 - 270
Copyright
Copyright © ICIPE 1988

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References

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