United States, Bureau of Agricultural Economics, Division of Fruits and Vegetables, Market News Branch, Agricultural Marketing Service, Department of Agriculture, Production and Marketing Administration, Michigan, Bureau of Foods and Standards, Dept. of Agriculture, Bureau of Marketing and Enforcement, and Federal-State Market News Service
Roberts, John W. (John William) and Pierce, Leslie.
Farmers' bulletin (United States. Dept. of Agriculture) ; no. 1479
Apple blotch; Apples; Diseases and pests; life cycle (organisms); apples; orchards; fruit trees; plant diseases and disorders; fungal diseases of plants; leaf blotch; spraying; varietal resistance; sulfur; copper sulfate