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Occurrence of a New Race of Botryosphaeria corticis on Highbush and Rabbiteye Blueberry. R. D. Milholland, Department of Plant Pathology, North Carolina State University, Raleigh 27650. Plant Dis. 68:522-523. Accepted for publication 21 February 1984. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-522.

A new race of Botryosphaeria corticis was demonstrated on the basis of disease reactions on a set of differential cultivars of highbush blueberry. Race SC-7 was highly virulent on the cultivars Bluecrop, Croatan, Earliblue, and Wolcott. No other known race of B. corticis produces a susceptible reaction on all four of these cultivars. Race SC-6 was identified as the predominant race causing severe stem canker development on rabbiteye cultivars in North Carolina and Georgia.