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The Ecology, Bionomics and Control of Rice Stem-Borers in West Africa

  • E. A. Akinsola
  • M. Agyen-Sampong
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Abstract

The importance of rice in West Africa and the problem posed by pests were highlighted. Stem-borers are regarded as major insect pests of rice and available information on yield losses attributable to insect pests in general and stem-borers in particular, was reviewed. Damage caused by stem-borers usually results in “dead hearts” and “white heads” though other effects including a synergistic interaction between stem-borers and rice blast have been recorded. Survey methods and sampling of rice stem-borers were discussed and brief descriptions on distribution, behaviour and biology of the major rice stem-borers namely, Chilo spp., Maliarpha separatella, Scirpophaga spp., Sesamia spp. and Diopsis spp. were given. Current control tactics under investigation in West Africa include chemical, cultural and biological methods.

Key Words

Stem-borers rice damage pests yield loss sampling control West Africa 

Résumé

L’écologie, la bionomie et le contrôle des foreurs de tige de riz en Afrique de l’Ouest. L’importance de la riziculture en Afrique de l’Ouest et le problème de la survie face aux insectes nuisibles ont été posés. Les foreurs de tige sont considérés comme le fléau le plus important pour le riz, les renseignements sur les pertes de rendement dûes aux insectes nuisibles en général, et au foreurs de tige en particulier ont été examinés. Habituellement les dégats causés par les foreurs de tige se traduisent par la pourriture de coeurs et par la panioule blanche, bien que d’autres effets comme, par exemple, une interaction synergetique entre les foreurs de tige et la pyriculariese aient été enregistrés. Des méthodes de recensement et d’échautillennage des foreurs de tige de riz ont été préposés, et de brèves description ont été données sur la répartitien, le comportement et la biologie des principeux foreurs de tige tels que le Chile, le Maliarpha separatella, le Seirpophaga, le Sesamia et le Diopsis. Les tactiques de contrôle actuellement en étude en Afrique de l’Ouest comprennent la lutte chimique, culturale et biologique.

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Copyright information

© ICIPE 1984

Authors and Affiliations

  • E. A. Akinsola
    • 1
  • M. Agyen-Sampong
    • 2
  1. 1.West Africa Rice Development Association (WARDA)MonroviaLiberia
  2. 2.WARDA Special Research ProjectRokuprSierra Leone

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