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Incidence de quelques facteurs agronomiques sur les populations de Meloidogyne spp. et leurs principaux organismes parasites en culture maraîchère sahélienne

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For more content, see Nematologica.

Des prospections nématologiques ont été réalisées dans les régions de production maraîchère de deux pays sahéliens, le Burkina Faso et le Sénégal. Des analyses de correspondances entre quelques facteurs agronomiques et les populations de Meloidogyne spp. ont montré que les niveaux des populations telluriques et racinaires n'étaient pas exclusivement liées à la sensibilité des cultures maraîchères en place, mais dépendaient aussi des précédents culturaux ou des agrosystèmes (terres inondées ou exondées) qui prévalent dans ces régions. En outre, la présence de micro-organismes parasites des nématodes (champignons nématophages et Pasteuria penetrans) dans les agrosystèmes de terres exondées, permet d'envisager l'intégration de méthodes de contrôle biologique à l'aide d'hyperparasites indigènes aux méthodes de lutte culturale.

Impact of agronomic factors on Meloidogyne spp. populations and their most common parasites in Sahelian vegetable cropping systems - Nematode surveys were carried out in vegetable producing areas in two Sahelian countries, Burkina Faso and Senegal. Correspondence analysis between agronomical factors and populations of Meloidogyne spp. revealed that vegetable susceptibility to nematodes was not the only factor responsible for soil and root infestations. Population densities would more readily depend on cropping systems (previous crops, often flooded lowlands vs well drained uplands). Natural occurrence of nematode-parasitic microorganisms (nematophagous fungi and Pasteuria penetrans) in upland agrosystems was observed and could be used together with cultural practices in an IPM approach.

Affiliations: 1: INERA/SPV,B.P.403, Bobo Dioulasso, Burkina Faso; 2: UCAD, Département de Biologie Animale, B.P.5005, Dakar,Sénégal; 3: UR IRD 51, Laboratoire de Nématologie, B.P.1386, Dakar,Sénégal

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/content/journals/10.1163/156854100750112842
2000-11-01
2016-12-09

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