More about United States. Division of Plant Disease Control:
| | Books by United States. Division of Plant Disease Control: Books in the extended shelves: United States. Division of Plant Disease Control: Blister rust control areas in Minnesota requirements for shipping ribes and five-leafed pines into such areas (Division of Insect Control, Nursery and Apiary Inspection, 1935), also by A. G. Ruggles and Minnesota. Division of Forestry (page images at HathiTrust; US access only) United States. Division of Plant Disease Control: Control of white pine blister rust : a cooperative effort to prevent damage to the white-pine resources of the United States (U.S. Dept. of Agriculture, 1950) (page images at HathiTrust) United States. Division of Plant Disease Control: Kill barberry bushes that spread stem rust to grains (U.S. Dept. of Agriculture, 1950) (page images at HathiTrust) United States. Division of Plant Disease Control: Status of white pine blister rust control on January 1, 1939 (United States Department of Agriculture, Bureau of Entomology and Plant Quarantine, 1939), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust) United States. Division of Plant Disease Control: White pine blister rust control, 1936 (s.n., 1936), also by Lawrence B. Ritter and Minnesota. Division of Forestry (page images at HathiTrust; US access only) United States. Division of Plant Disease Control: White pine blister rust control, 1937 (s.n., 1937), also by Lawrence B. Ritter and Minnesota. Division of Forestry (page images at HathiTrust; US access only)
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