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First Report of Strawberry Anthracnose Caused by Colletotrichum acutatum in Connecticut. J. A. LaMondia, Department of Plant Pathology and Ecology, Connecticut Agricultural Experiment Station, Valley Laboratory, P.O. Box 248, Windsor, CT 06095. Plant Dis. 75:1286. Accepted for publication 23 August 1991. Copyright 1991 The American Phytopathological Society. DOI: 10.1094/PD-75-1286A.

In early June 1991, an anthracnose fruit rot was observed in 3- to 5-yr-old plants of strawberry (Fragaria X ananassa Duchesne) cultivars Honeoye, Kent, and NY-I 13 in Hartford, New Haven, and Tolland counties in Connecticut. Fruit symptoms included sunken, light brown, water-soaked lesions that produced spore masses from subepidermal acervuli. Fruit became mummified under dry conditions. Isolations onto potato-dextrose agar from diseased green or ripe fruit and from brown stolon lesions yielded colonies of Colletotrichum acutatum J.H. Simmonds (1) with white to gray aerial mycelium and orange to salmon-colored spore masses. Colony diameters averaged 40 mm after 5 days at 25 C. Fusiform conidia from cultures averaged 14.5 X 5 µ, and setae were absent from fruit and PDA cultures. Healthy green Honeoye fruit inoculated with conidia showed similar symptoms after 3-4 days; the pathogen was reisolated from diseased fruit. This is the first report of strawberry anthracnose in Connecticut.

Reference: (1) B. J. Smith and L. L. Black. Plant Dis. 74:69, 1990.