The potential of endemic natural enemies to suppress pear psylla, Cacopsylla pyricola Förster, in the Hood River Valley, Oregon
By: by Steven R. Booth.
Published: 1992
Language: eng
Number of pages: 142
Subjects: Psylla -- Biological control -- Oregon.; Pear -- Diseases and pests -- Oregon.
Notes: Typescript (photocopy)

Thesis (Ph.D.)--Oregon State University, 1992.

Includes bibliographical references (leaves 134-142)