Previous View
 
APSnet Home
 
Plant Disease Home


VIEW ARTICLE

Research

Broad Spectrum Apple Disease Control with Bitertanol. K. S. Yoder, Department of Plant Pathology and Physiology, Virginia Polytechnic Institute and State University, Fruit Research Laboratory, Winchester 22601. Plant Dis. 66:580-583. Accepted for publication 29 September 1981. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-580.

The sterol-inhibiting fungicide bitertanol was field tested in a 3-yr period (1978–1980) against apple scab, powdery mildew, cedar apple rust, and several other diseases of apple (Malus pumila) in Virginia. Bitertanol 50W, applied at a dilute rate of 30 g/100 L, was equal to or better than the standard rate of Dikar (mancozeb + dinocap) for control of scab, powdery mildew, sooty blotch, and fly speck. Bitertanol 50W (15 g/100 L) provided better control of cedar apple rust than the Dikar standard. Equivalent rates of both materials applied with a conventional air-blast sprayer were also equal in control of Brooks fruit spot. Bitertanol did not adversely affect the finish of Miller Spur Delicious, Golden Delicious, Rome Beauty, or Jonathan apple fruit.

Keyword(s):