Reproduction of Meloidogyne arenaria M. incognita and M. javanica on Sesame

摘要

Reproduction of Meloidogyne arenaria race 1, M. ineognita races 1 and 3, and M. javanica on 10 cultivars of sesame (Sesame indicum) was examined in greenhouse tests. Sesame cultivars were also evaluated in a field infested with M. arenaria. Sesame was a poor host for M. incognita races 1 and 3 as no sesame genotype supported more than 70 eggs/g root. Reproduction of M. arenaria race 1 on sesame varied from 20 eggs/g roots for cultivar Sesaco 7CB to 1,570 eggs/g roots for Sesaco 119 in the greenhouse. Two cultivars that supported moderate levels of reproduction (128-160 eggs/g root) in greenhouse tests, however, supported only low final population densities (<40 eggs and second-stage juveniles [J2]/500 cm³ soil) in field plots. In the same test, the peanut cultivar Florunner supported final population densities of 2,490 eggs and J2/500 cm³ soil. Reproduction of M. javanica on sesame in the greenhouse varied from 580 to 8,230 eggs/g root. These data suggest that sesame may be an effective rotation crop for control of M. arenaria or M. incognita but not M. javanica.