s:820:"TI Effect of natural and sesbania fallows and crop rotations on the incidence of root-knot nematodes and tobacco production in Tabora, Tanzania 
AU Shirma S 
AU Otsyina R M 
AU Mwageni W P 
AU Bridge J 
AB A three-year field study was conducted at Tumbi Agricultural Research Institute, Tabora, Tanzania to determine the effect of natural and Sesbania fallows and crop rotations on the incidence of nematodes [Meloidogyne incognita and Meloidogyne javanica] and tobacco production. Sesbania sesban provenance and tobacco support the reproduction of root-knot nematodes while maize and natural weeds are poor hosts. Nematode infections were consistently highest when tobacco was cropped for two consecutive seasons and after two years of Sesbania fallow. Cropping maize after tobacco and Sesbania significantly (P 
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