Host Status of Selected Tropical Rotation Crops to Four Populations of Root-Knot Nematodes

The susceptibility of selected tropical rotation crops to Meloidogyne incognita races 1 and 3, M. arenaria race 1, and M. javanica was evaluated in a series of greenhouse inoculation tests. 'Rutgers' tomato (Lycopersicon esculentum) and (or) 'Clemson Spineless' okra (Hibiscus esculentus) were included as hosts susceptible to all of the nematode populations, and 'Florunner' peanut (Arachis hypogaea) and 'Deltapine 90' or 'Deltapine 51' cotton (Gossypium hirsutum) were included as hosts susceptible only to M. arenaria race 1 and M. incognita race 3, respectively. Horsebean (Canavalia ensiformis), 'Sesaco 16' sesame (Sesamum indicum), and 'Kirby' soybean (Glycine max) exhibited intermediate levels of galling and egg mass production in response to several of the root-knot nematode populations. No egg masses were observed on crotalaria (Crotalaria spectabilis), 'Hale' castor (Ricinus communis), partridge pea (Cassia fasiculata), 'SX-17' sorghum-sudangrass (Sorghum bicolor x S. sudanense),