Toxicity of some commonly used pesticides to Trioxys Pallidus and its establishment in filbert orchards of Willamette Valley
By: by Mohammad Saeed.
Published: 1989
Language: eng
Number of pages: 90
Subjects: Wasps -- Oregon -- Willamette River Valley -- Effect of pesticides on.; Hazel -- Diseases and pests -- Biological control -- Oregon -- Willamette River Valley.
Notes: Typescript (photocopy).

Thesis (M.S.)--Oregon State University, 1990.

Includes bibliographies.