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Management of Chilo spp. infesting cereals in Eastern Africa

Published online by Cambridge University Press:  19 September 2011

E. M. Minja
E. M. Minja
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), Mbita Point Field Station, P. O. Box 30, Mbita, South Nyanza, Kenya
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Abstract

The distribution and existing control measures for three important Chilo spp. (C. partellus, C. orichalcocilliellus and C. sacchariphagus) to cereal crop production in 10 east African countries and their neighbouring Indian Ocean Islands are reviewed. Various cultural, biological, host-plant resistance/tolerance and chemical control methods developed in the past 30 years of cereal research programmes are discussed. Cultural methods are very effective on Chilo spp. control, but are not widely practised. Although several effective natural enemies have been identified for Chilo spp., very few systematic programmes of their utilization have been effected. Several resistant/tolerant maize and sorghum lines have been reported, but they are not yet fully used. Chemical control though effective, has proved rather unsuccessful in traditional agriculture. Suggestions to incorporate these control methods in Integrated Pest Management (IPM) programmes for Chilo spp. in different places in the region are given.

Résumé

L'existence et la répartition des mesures de lutte contre les 3 principaux types de Chilo spp. (le C. partellus, le C. orichalcociliellus et le C. sacchariphagus) dans les champs de céréales dans 10 pays de l'Afrique orientale et dans les îles voisines de l'Océan Indien font actuellement l'objet d'une remise en question. Plusieurs méthodes de lutte naturelles, biologiques, chimiques ou de la plante-hôte résistante/tolérante à l'égard du Chilo spp. mises au point tout au long des 30 dernières années de recherche sur les céréales sont de nos jours très discutées. Dans la lutte contre le Chilo spp., les méthodes naturelles/culturales sont très efficaces mais elles ne sont malheureusement pas très répendues. Bien qu'un nombre considérable de véritables ennemis naturels du Chilo spp. ait été identifié, très peu de programmes se sont systèmatiquement engagés à s'en servir. Plusieurs variétés de maïs et de sorgho réputées resistantes ou tolerantes a l'egard de cet insecte ont ete inventoriees mais leur culture n'a vraiment pas été suffisamment répendue.

Quant à la lutte chimique, bien qu'étant reconnue très efficace, elle n'a pas donné de résultats satisfaisants dans le domaine de l'agriculture traditionnelle. Nous avons reçu des suggestions en provenance de différents coins de la région demandant l'insertion de toutes ces méthodes dans le Programme Intégré de Lutte contre les Insectes.

Keywords

Cereal stem borersChilo spp.control methodsculturalbiologicalhost-plant resistancechemicalIntegrated Pest ManagementDévoreurs de tige des céréalesChilo spp.méthodes de lutteculturales/naturellesbiologiquesplante-hôte résistantechimiquesProgramme Intégré de Lutte contre les Insectes
Type
Status and Control of Chilo spp. in Different Regions
Information
International Journal of Tropical Insect Science , Volume 11 , Special Issue 4-5: Tropical Stem Borers of Graminaceous Crops: A New Synthesis , October 1990 , pp. 489 - 499
Copyright
Copyright © ICIPE 1990

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