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Assessment of On-Farm Losses in Rice Due to Insect Pests

Published online by Cambridge University Press:  19 September 2011

M. Agyen-Sampong
M. Agyen-Sampong
Affiliation:
West Africa Rice Development Association, Regional Mangrove Swamp Rice Research Station, Rokupr. P.M.B. 678, Freetown, Sierra Leone
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Abstract

The rice plant is an extremely versatile crop that is grown under both tropical and sub-tropical conditions in various ecological conditions. Several insect pest species attack the rice crop at all growth stages while in the field. The nature and magnitude of crop loss due to insect pest attack in tropical and sub-tropical Africa are highlighted. Reliable evaluation techniques for establishing relation between insect pest intensity/damage and crop loss are outlined. Natural insect pest infestation in the field, manipulation of pest infestation with chemicals, caging to confine or keep out insect pests and the use of resistant varieties as methods of estimating on-farm losses due to insects are discussed. In tropical Africa, the major constraint to the determination of crop loss due to insect pests of rice is research-related.

Résumé

Le riz est une culture tres adaptable qui se cultive dans des conditions ecologiques diverses dans les zones tropicales et sub-tropicales. Plusieurs especes d'insectes peuvent attaquer le riz au champs a tous les stades de son developpement. Nous presentons dans cet article la nature et l'importance des degats causes au riz par les insectes dans les zones tropicales et sub-tropicales de l'Afrique. L'article met l'accent sur les techniques fiables d'evaluation utilisees pour mesurer les relations pouvant exister entre le degre d'infestation/degats et les pertes de recoltes. Des methodes d'evaluation des pertes au champs causees par des insectes, telles que l'infestation des insectes au champs, lutte chimique contre les insectes, l'utilization des cages et des varietes resistantes contre les insectes sont aussi discutees. En Afrique tropicale, la determination precise des pertes de recoltes dues aux insectes est un probleme de recherche.

Keywords

Ricecrop lossrice pestsestimation of crop losstropical AfricaRizperte de recoltesinsectes nuisibles au rizevaluation des pertesAfrique tropicale
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 9 , Special Issue 6: On-Farm and Post-Harvest Losses of Cereal Crops in Africa due to Pests and Diseases , December 1988 , pp. 691 - 695
Copyright
Copyright © ICIPE 1988

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References

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