Differences in Susceptibility of Stylosanthes hamata to Colletotrichum gloeosporioides. R. M. Sonoda, Associate Professor, University of Florida, Agricultural Research Center, Fort Pierce, FL 33450. J. B. Brolmann, Assistant Professor, University of Florida, Agricultural Research Center, Fort Pierce, FL 33450. Plant Dis. 64:553-554. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-553.

Anthracnose incited by Colletotrichum gloeosporioides was more severe on accessions of Stylosanthes hamata indigenous to the southeast coast of Florida with 2N = 40 chromosomes than on those with 2N = 20 chromosomes. The 2N = 40 S. hamata were found in four localized areas and the 2N = 20 ecotypes were widely distributed along the southeast coast of Florida. The 2N=40 accessions had a smaller beak on their seedpods and grew more vigorously in forage evaluation tests. Further tests are needed to determine whether the two types are conspecific.