Root-knot nematodes in the Sudan and their chemical control

Abstract

Root-knot nematodes (Meloidogyne spp.) occur widely spread in river silt along the Nile bank and in light volcanic and alluvial soils of the Sudan (Yassin et al., 1970; EI Amin and Siddiqi, 1970). Although they may infest many crop and weed plants, their economic damage is most often confined to tobacco and some of the vegetable crops especially tomato. This article deals with the geographical distribution and host range of the various species, some biological aspects of important pathogens, chemical control of the most important species in tomato and the performance of resistant tomato lines under local conditions.