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Controlling important fungous and insect enemies of the pear in the humid sections of the Pacific Northwest
Fisher, D. F. , Newcomer, E. J. (Erval Jackson) , 1890-
Pear Diseases and pests Northwestern States , pome fruits , fungal diseases of plants , climatic factors , scab diseases , plant damage , disease and pest management , control methods , spraying , economic analysis , insect pests , mites , fungicides , copper sulfate , calcium carbonate , sulfur , insecticides , arsenicals , spraying equipment , dusting , Chrysomelidae , Eriophyidae , antifungal agents
- 34 p. ; ill., 1 map ; 23 cm.
- U.S. Dept. of Agriculture
Organic Roots Collection