Impact of agronomic factors on Meloidogyne spp. populations and their mostcommon parasites in Sahelian vegetable cropping systems

Nematode surveys were carried out in vegetable producing areas in two Sahel ian countries, Burkina Faso and Senegal. Correspondence analysis between ag ronomical factors and populations of Meloidogyne spp. revealed that vegetab le susceptibility to nematodes was not the only factor responsible for soil and root infestations. Population densities would more readily depend on c ropping systems (previous crops, often flooded lowlands vs well drained upl ands). Natural occurrence of nematode-parasitic microorganisms (nematophago us fungi and Pasteuria penetrans) in upland agrosystems was observed and co uld be used together with cultural practices in an IPM approach.