Blight of pears, apples, and quinces
By: [prepared by Plant Science Research Division, Agricultural Research Service]
Edition: Revised February 1972.
Series: Leaflet / United States Department of Agriculture ; no. 187; Leaflet (United States. Dept. of Agriculture) -- no. 187.
Publisher: U.S. Dept. of Agriculture
Published: 1972
Place of publication: Washington, D.C
Language: eng
Subjects: Apples; Diseases and pests; Fire-blight; Pear; Quince