SCREENING STRAWBERRIES FOR RESISTANCE TO COLLETOTRICHUM ACUTATUM IN NORTH CAROLINA
Commercial strawberry production in North Carolina is changing rapidly since the introduction of annual hill culture. At the present time, the California cultivars utilized in this production system are highly susceptible to the anthracnose pathogen, Colletotrichum acutatum. Cooperatives studies were initiated in 1991 to develop superior genotypes of strawberry cultivars that are resistant to anthracnose and are adapted to either annual hill or matted row culture. Differences in pathogenicity and virulence of 12 isolates of C. acutatum were determined. Isolates from strawberry as well as from other hosts were separated into three virulence classes based upon the disease reactions of six strawberry genotypes. Inoculation and evaluation of some 20 strawberry selections under controlled environmental conditions indicated a wide range of disease reactions to a virulent isolate (CA-1) of C. acutatum. Evaluation of the fruit of 24 strawberry selections in the field to the same isolate also indicated a wide range of infection from a high of 70% fruit rot for ‘Chandler’ to 2% for the selection FL87-210.
Ballington, J.R. and Milholland, R.D. (1993). SCREENING STRAWBERRIES FOR RESISTANCE TO COLLETOTRICHUM ACUTATUM IN NORTH CAROLINA. Acta Hortic. 348, 444-448