Species of Colletotrichum and Glomerella Pathogenic to Tomato Fruit. W. E. Batson, Professor, Department of Plant Pathology and Weed Science, Mississippi State University, Mississippi State 39762. K. W. Roy, Associate Professor, Department of Plant Pathology and Weed Science, Mississippi State University, Mississippi State 39762. Plant Dis. 66:1153-1155. Accepted for publication 24 March 1982. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-1153.

Eleven species of Colletotrichum and Glomerella and one subspecies of Colletotrichum were inoculated into detached, ripening tomato fruit. Colletotrichum sp. 1, Colletotrichum sp. 2, C. coccodes, C. dematium, C. dematium var. truncata, C. destructivum, C. gloeosporioides, C. graminicola, C. trichellum, Glomerella sp., G. glycines, and G. gossypii were pathogenic. C. falcatum and C. trifolii were nonpathogenic. In general, isolates of Colletotrichum sp. 1, C. gloeosporioides, C. dematium, and G. glycines were most aggressive. Differences in virulence among isolates occurred within G. glycines, Colletotrichum sp. 1, and C. gloeosporioides, with the greatest variability occurring in the latter species. C. dematium var. truncata, C. graminicola, C. trichellum, G. glycines, and G. gossypii are reported as pathogenic to tomato fruit for the first time.

Keyword(s): anthracnose, barnyardgrass, big spurge, blue verbena, cocklebur, cowpea, johnsongrass, morningglory, okra, redroot pigweed, ryegrass, spotted spurge, three-seeded mercury, watermelon.