An analysis of pear psylla populations 1977-79.
Contributors: United States. Science and Education Administration. Agricultural Research. Western Region.
Series: Agricultural reviews and manuals. ARM-W -- no. 24.; Agricultural reviews and manuals -- 24.
Publisher: Agricultural Research, Western Region, Science and Education Administration, U.S. Dept. of Agriculture
Published: 1981
Place of publication: Oakland, Calif
Language: eng
Number of pages: 31
Subjects: Psylla.; Pear -- Diseases and pests.
Notes: "May 1981."

Bibliography: p. 7-9.