The distribution of leaves and pear psylla in pear trees
By: by Robert E. Fye.
Series: Agricultural reviews and manuals -- 30.
Publisher: Agricultural Research Service (Western Region), U.S. Dept. of Agriculture; Available from Yakima Agricultural Research Laboratory
Published: 1982
Place of publication: Oakland, Calif; Yakima, WA
Language: eng
Number of pages: 15
Subjects: Psylla pyricola.; Pear trees -- Diseases and pests.
Notes: Caption title.

Includes bibliographical references (p. 15).

Microfiche (negative). [Washington, D.C.] : U.S. G.P.O., 1982. 1 sheet.