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 protégé 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).
Similar content being viewed by others
References
Adewumi C. O. (1984) Natural products as agents of schistosomiasis control in Nigeria: A review of progress. Int. J. Crude Drug Res. 22, 161–166.
Adewumi C. O. and Adesogan E. K. (1986) Toxicology of some Nigerian plants used in Schistosomiasis control. I. The effect of molluscicides on molluscan hearts. Fitoterapia LVII 50, 353–358.
Bernays E. A., Chapman R. F., Leather E. M., McCuffery A. R. and Modder W. W. D. (1977) The relationship of Zonocerus variegalus (L.) A (Acridoidea: Pyrgomorphidae) with cassava (Manihot esculenta). Bull. ent. Res. 67, 391–404.
Dalziel J. M. (1955) The Useful Plants of West Tropical Africa. Crown Agents for Overseas Government and Administration, London.
Fasoranti J. O. and Olagunju O. M. (1985) Food selection by the variegated grasshopper Zonocerus variegatus, L. feeding bioassay using crops and weeds. Insect Sci. Applic. 6, 681–685.
Olaifa J. I. (1986) Toxicity of some insecticides to the grasshopper Zonocerus variegatus (Orthoptera: Pyrogomorphidae). Insect Sci. Applic. 7, 135–138.
Olaifa J. I. and Akingbohungbe A. E. (1987) Antifeedant and insecticidal effects of the passive extracts of Azadirachta indica, Petiveria alliacea and Piper guineense on the variegated grasshopper, Zonocerus variegatus (Orthoptera: Pyrgomorphidae). Proc. 3rd Int. Neem Conf Nairobi, Kenya (in press).
Ruppel R. F. and Dudek T. A. (1979) Protecting field crops from grasshoppers. Michigan State University Cooperative. Ext. Bull. E-1279, 1–3.
Schmutterer H. and Ascher K. R. S. (1984) Natural pesticides from the neem tree and other tropical plants. Proc. 2nd Int. Neem Conf., Rauschholzhauzen 1983. GTZ, Eschborn.
Toye S. Afolabi (1982) Studies on the biology of the grasshopper pest Zonocerus variegatus (L.) (Orthoptera: Pyrgomorphidae) in Nigeria: 1911–1981. Insect Sci. Applic. 3, 1–7.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Olaifa, J.I., Adenuga, A.O. Neem Products for Protecting Field Cassava From Grasshopper Damage. Int J Trop Insect Sci 9, 267–270 (1988). https://doi.org/10.1017/S1742758400006111
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1017/S1742758400006111