Peter H. Westigard

Identifiers

Open LibraryOL4935282A

Top Subjects

Pear -- Diseases and pests -- Oregon (2)
Tetranychus urticae -- Oregon (1)
Spider mites -- Oregon (1)
Psylla -- Oregon (1)

Books by Peter H. Westigard

Total count: 2

Bionomics and control of the two-spotted spider mite on pear in southern Oregon

Agricultural Experiment Station, Oregon State University1967-01-01
The pear psylla in Oregon

Agricultural Experiment Station, Oregon State University1972-01-01