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Fungicide Control of Brooks Fruit Spot of Apple. K. S. Yoder, Department of Plant Pathology and Physiology, Virginia Polytechnic Institute and State University, Fruit Research Laboratory, Winchester 22601. Plant Dis. 66:564-566. Accepted for publication 29 September 1981. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-564.

Unusually wet growing seasons in northern Virginia in 1978 and 1979 resulted in increased incidence of Brooks fruit spot (Phoma fruit spot) caused by Mycosphaerella pomi, affording opportunity to test fungicides for control of this relatively minor apple disease. Benomyl and Dikar, among materials widely used for general summer disease control but not specifically registered for Brooks fruit spot, provided good control. Folpet, thiram, and zineb, which are registered for control of this disease, provided adequate control but were significantly less effective than benomyl under severe test conditions. Metiram gave adequate control, whereas dodine, pyrazophos, and sulfur gave relatively poor disease control. Benomyl and Dikar, because of their effective control of Brooks fruit spot and powdery mildew, are particularly adaptable to disease management on Jonathan apple, which is highly susceptible to these diseases.