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Potentiel infectieux des sols de cultures de tomate (Lycopersicon esculentum Mill.) sous abri et incidence de l'âge de repiquage sur la vigueur des plants vis-à-vis de Pythium sp. à Songon-Dabou en Côte d'Ivoire

Author(s): Soro, S. | Doumbouya, M. | Koné, D.

Journal: Tropicultura
ISSN 0771-3312

Volume: 26;
Issue: 3;
Start page: 173;
Date: 2008;
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Keywords: Tomato | Soil born fungi | Baiting | Inoculation | Damping off | Songon Dabou | Ivory Coast

Potentiel Infectious of Soils Fields of Tomato (Lycopersicon esculentum Mill.) in Greenhouse and the Age Incidence Facing Pythium sp. on the Plants at Songon-Dabou in Ivory Coast. Songon-Dabou area represents one of the spheres activities of tomato in Ivory Coast. The production of tomato is strongly influenced by some of viruses, bacteria and soil born fungi. A study was conducted on the soils of different fields with three varieties of tomato (Caraïbo, Mongal and Tropimech) to identify the most susceptible variety to soil born fungi at Songon-Dabou. By baiting with 20 days old seedlings, 4 genus fungi of Pythium, Fusarium, Sclerotium and Macrophomina have been isolated. Pythium sp. presented the greatest attack (32%) while Macrophomina phaseoli was isolated for the first time on market gardening in Ivory Coast. Tomato plants have been inoculated by Pythium at different stages obtained from seedling to 25 days old nursery seedlings. That experiment was repeated three times. This work was conducted in greenhouse during 26 days after transplantation of the plants in the pots. These results confirm that Pythium sp. is a fungus of damping off (100%) and that age of transplantation reduces the rate of mortality (less than 20%).
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