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Filtering by: Advisor Day, E. A. Advisor Dickason, E. A. Degree Name Master of Science (M.S.)

Biology of the seed chalcids Bruchophagus gibbus (Boheman) and B. roddi Gussakovskii in Oregon

Creator:

Carrillo S., Jose Luis

Resource Type:

Masters Thesis

Full Text:

author wishes to express his iost sincere gratitude to Dr. E. A. Dicicason, Associate Professor of
Varietal resisitance of hops, Humulus lupulus (Linn.), to the two-spotted spider mite, Tetranychus urticae (Koch)

Creator:

Mayberry, Terrel Wilson

Abstract:

The purpose of this study was to determine the relative resistance of genetic lines of hops, Humulus lupulus (Linn.) to the two-spotted spider mite, Tetranychus urticae (Koch) in western Oregon. Approximately three-hundred genetic lines of hops were screened under insectory conditions during the 1965 growing season at Corvallis, Oregon. Reduction...

Resource Type:

Masters Thesis

Full Text:

, TETRANYCHUS URTICAE (KOCH). Abstract approved: Redacted for Privacy E. A. Dickason The purpose of this
Insect parasites of the omnivorous leaf tier, Cnephasia longana (Haworth) in Oregon

Creator:

Poonyathawon, Panya

Abstract:

The purpose of this study was to determine the present status of introduced parasites of the omnivorous leaf tier, Cnephasia longana (Haworth) in Oregon. The omnivorous leaf tier is native to Europe. It was introduced into North America around 1929 and became a serious pest of economic crops such as...

Resource Type:

Masters Thesis

Full Text:

privacy Dr. E. A. Dickason The purpose of this study was to determine the present status of introduced