Field Evaluation of Selected Soybean Cultivars for Resistance to Two Races of Meloidogyne arenaria.
The soybean cultivars 'Braxton' and 'Kirby' were less susceptible to both races 1 and 2 of Meloidogyne arenaria than 'Centennial' and 'Young', which were highly susceptible. Soybean seed yields of resistant cultivars were greater (P = 0.05) than susceptible cultivars. Reproduction of M. arenaria races 1 and 2 was significantly lower on less susceptible cultivars compared to highly susceptible cultivars. Root galling, caused by M. arenaria, was 5-10 times greater on Centennial and Young than on less susceptible cultivars Kirby and Braxton. Resistance was independent of the host race of M. arenaria used in this study. Populations of M. arenaria that are highly pathogenic to soybean should be used in screening for soybean resistance rather than specific host races.
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