Role of Bemisia tabaci in the red cotton disease in Cameroon
The Red Cotton Disease ("Maladie des Cotonniers Rouges", or MCR, in French) is a disorder that has affected cotton in Northern Cameroon since 1990. The role of Bemisia tabaci (Gennadius) in the development of this phenomenon has been investigated. In a field trial, methamidophos applications allowed a reduction of MCR symptoms. In field surveys, the MCR symptoms (dried out plants) showed significant correlations with the maximal nymph density of a few weeks before. Nymph counts made on leaves showing first symptoms of MCR (reddish areas on the limb) revealed that nymph density was significantly higher in reddish limb areas than in green limb areas.
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| Main Authors: | , |
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| Format: | conference_item biblioteca |
| Language: | eng |
| Published: |
s.n.
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| Subjects: | H10 - Ravageurs des plantes, Bemisia tabaci, Gossypium, http://aims.fao.org/aos/agrovoc/c_30755, http://aims.fao.org/aos/agrovoc/c_3335, http://aims.fao.org/aos/agrovoc/c_1229, |
| Online Access: | http://agritrop.cirad.fr/401221/ |
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| Summary: | The Red Cotton Disease ("Maladie des Cotonniers Rouges", or MCR, in French) is a disorder that has affected cotton in Northern Cameroon since 1990. The role of Bemisia tabaci (Gennadius) in the development of this phenomenon has been investigated. In a field trial, methamidophos applications allowed a reduction of MCR symptoms. In field surveys, the MCR symptoms (dried out plants) showed significant correlations with the maximal nymph density of a few weeks before. Nymph counts made on leaves showing first symptoms of MCR (reddish areas on the limb) revealed that nymph density was significantly higher in reddish limb areas than in green limb areas. |
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