VIEW ARTICLE

Ecology and Epidemiology

Survival of Colletotrichum coccodes in Soil. J. D. Farley, Associate Professor, Ohio Agricultural Research and Development Center, Wooster 44691, and The Ohio State University, Columbus 43210; Phytopathology 66:640-641. Accepted for publication 15 December 1975. DOI: 10.1094/Phyto-66-640.

By using a selective medium, the survival of conidia and sclerotia of Colletotrichum coccodes was studied in an artificially infested soil incubated either moist or dry at 4 C or 25 C for 52 weeks. Survival also was studied in soils incubated at 25 C in which the moisture level was continuously varied. When sclerotia were used as an inoculum, a decrease in populations was detected after 52 weeks in dry or moist soil incubated at 4 C or 25 C or in soil incubated at 25 C where moisture varied. Conidia populations were reduced in the first week by 89-96% in dry soil and 28-45% in moist soil with the less rapid population decline in the soil incubated at 4 C. After 52 weeks, conidia populations were reduced by 96-99% in all treatments.