Déat Michel.
1989. Chemical weed control in cotton in West Africa research results and use by farmers.
In : The Tenth Conference of the Asia-Pacific Weed Science Society, November 24-30, 1985, Chiangmai, Thailand. Proceedings and abstracts. Thai Pesticides Association
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Résumé : In the savannah areas of francophone West Africa, farms are usually small, ranging from 1 to 2 ha, but larger farms ranging from 10 to 20 ha are beginning to appear. Stable and mechanized farming is gradually replacing the traditional shifting cultivation. These changes are confronting the farmers with weeding problems and chemical weed control is increasing. Cotton, the cash crop, is the first to be weeded by this means but progressively the food crops such as maize, groundnut and upland rice, that are integrated with cotton in the cropping systems, are also chemically weeded. This has become possible as a result of research work on improved cotton by IRCT, one of the CIRAD departments, which has organised an international network of trials. The trials were carried out using a methodology that allowed a study of the herbicidal efficiency of the products, their phytotoxicity to the crops, carry over to subsequent crops and economical approach to herbicide use. Consequently, extension services have distributed several products including nuometuron, dipropetryn, dipropetryn + metolachlor and pendimethalin. Farmers now apply preemergence sprays on 40 to 50 thousand ha of cotton, using C D A hand-sprayers. This represents 15 to 20% of the total cotton growing areas such as the Ivory Coast and Cameroon where this development is most advanced.
Auteurs et affiliations
- Déat Michel
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Source : Cirad-Agritrop (https://agritrop.cirad.fr/603779/)
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