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Filtering by: Subject Clover -- Seeds -- Oregon Degree Field Entomology

Insect pests affecting clover in Oregon

Creator:

Anderson, Ernest Clifford

Resource Type:

Masters Thesis

Full Text:

primary impor- tance in soi]. fertility and seed production. Although the Oregon farmers use clover
Seasonal abundance, distribution, and migration of the clover aphid, Nearctaphis bakeri (Cowen) in red clover

Creator:

Dreves, Amy J.

Abstract:

Four sampling techniques were evaluated to estimate clover aphid, Nearctaphis bakeri (Cowen), abundance in red clover fields in the Willamette Valley. The Berlese funnel method detected one to four times more aphids than other sampling techniques. Visual assessment often underestimated the high aphid densities during the flowering and seeding of...

Resource Type:

Masters Thesis

Full Text:

and most commonly, red clover. Oregon produced 1/7 of the total production of grass and legume seed
The life history and habits of a new species of seed midge, Dasyneura Sp., which attacks Ladino clover

Creator:

Bishop, Guy William

Resource Type:

Masters Thesis

Full Text:

Southern Oregon. Because of its similar appearance this insect was thought to be the clover- seed midge
Impact of insects on seed production in a Douglas-fir seed orchard in Oregon

Creator:

Dombrosky, Scott A.

Abstract:

The impact of various factors on seed production in a Douglas-fir (Pseudotsuga menziesii) seed orchard in western Oregon was examined by monitoring the fate of seeds in thirty cones, stratified into three crown levels, on each of ten trees during the 1984 growing season. Cones were examined monthly between April...

Resource Type:

Masters Thesis

Full Text:

-fir Seed Orchard in Oregon. Abstract approved:_ Redacted for Privacy /TiGothy D. Schowalter The