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Effects of cypermethrin + dimethoate and extracts of Piper guineense and Azadirachta indica on the pests and yield of cowpea, Vigna unguiculata

Published online by Cambridge University Press:  27 March 2009

M. F. Ivbijaro  and
O. O. Bolaji
M. F. Ivbijaro
Affiliation:
Department of Agricultural Biology, University of Ibadan, Ibadan, Nigeria
O. O. Bolaji
Affiliation:
Department of Agricultural Biology, University of Ibadan, Ibadan, Nigeria
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Summary

Field trials were conducted in 1988 at the University of Ibadan to determine the effects of cypermethrin + dimethoate (Sherpa Plus®), the oil extract from ripe seeds of Piper guineense Schum & Thonn and the aqueous extract of ripe seeds of Azadirachta indica A. Juss on the pests and yield of cowpea. Cypermethrin + dimethoate was consistently superior to all other treatments in substantially reducing the population densities of Megalurothrips sjostedti Trybom and of Maruca testulalis Geyer, which are serious pests on flowers and buds, and in reducing the densities of four pod-sucking bugs. Pest population densities were also reduced by foliar sprays with A. indica or P. guineense extracts.

Seed yield after treatment with cypermethrin + dimethoate was 0·99 t/ha, more than double the yield from other treatments. A marginal increase in seed yield compared with the control was achieved by foliar spraying with A. indica extract.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 115 , Issue 2 , October 1990 , pp. 227 - 231
Copyright
Copyright © Cambridge University Press 1990

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References

REFERENCES

Fagoonee, I. (1987). Use of neem in vegetable crop protection in Mauritius. In Natural Pesticides from the Neem Tree (Azadirachta indica A. Juss) and other Tropical Plants (Eds Schmutterer, H. & Ascher, K. R. S.), pp. 419–430. Proceedings of the Third International Neem Conference, Nairobi, Kenya, 1986. (GTZ) GmbH Eschborn.Google Scholar
Ivbijaro, M. F. & Agbaje, M. (1986). Insecticidal activities of Piper guineense Schum and Thonn. and Capsicum species on the cowpea bruchid, Callosobruchus maculatus F. Insect Science Applications 7, 521–524.Google Scholar
Jackai, L. E. N. (1984). Insect surveys and yield loss assessment. Annual Report for 1983, International Institute of Tropical Agriculture, Ibadan, pp. 76–79.Google Scholar
Salifu, A. B. (1982). Biology of cowpea flower thrips and host plant resistance. MSc thesis, University of Ghana.Google Scholar
Saxena, R. C. (1987). Neem seed derivatives for management of rice insect pests – a review of recent studies. In Natural Pesticides from the Neem Tree (Azadirachta indica A. Juss) and other Tropical Plants (Eds Schmutterer, H. & Ascher, K. R. S.), pp. 55–80. Proceedings of the Third International Neem Conference, Nairobi, Kenya, 1986. (GTZ) GmbH Eschborn.Google Scholar
Schmutterer, H. (1987). Fecundity-reducing and sterilizing effects of neem seed kernel extracts in the Colorado potato beetle, Leptinotarsa decemlineata. In Natural Pesticides from the Neem Tree (Azadirachta indica A. Juss) and other Tropical Plants (Eds Schmutterer, H. & Ascher, K. R. S.), pp. 351–360. Proceedings of the Third International Neem Conference, Nairobi, Kenya, 1986. (GTZ) GmbH Eschborn.Google Scholar