The nematode fauna of potato tubers with ditylenchose

Abstract

We have studied nematode species compositions found in potato tubers with ditylenchose. A total of 20 species of nematodes have been revealed which are included in 17 genera, 8 families and 2 orders. Nematodes of potato tubers are represented by three eco-trophic groups: plant parasites 1 species (5%), mycotrophies 5 species (25%), and bacteriotrophies 14 species (70%). The bacteriotrhophies group is predominant in the number of species. Among those species presenting a dominating status (on the number) there are two species of mycotrophs which are usual and in ill potato tubers one can seldom find 7 species of bacteriotrophs and 2 species of mycotrophies.