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Filtering by: Subject Subterranean clover -- Oregon Subject Red clover -- Diseases and pests -- Oregon

Integrated small broomrape (Orobanche minor Sm.) management in red clover (Trifolium pratense L.)

Creator:

Ross, Kyle C.

Abstract:

Small broomrape, a holoparasitic weed, is a relatively new weed introduction in the Pacific Northwest that has contaminated a limited number of red clover fields in Oregon. Greenhouse and field studies were conducted to evaluate small broomrape response to common crop and weed species in the Pacific Northwest. Host species...

Resource Type:

Masters Thesis

Full Text:

limited number of red clover fields in Oregon. Greenhouse and field studies were conducted to evaluate
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:

, Nearctaphis bakeri (Cowen) in Red Clover by Amy J. Dreves A THESIS submitted to Oregon State University
Small broomrape : biology and management in the Pacific Northwest

Creator:

Oregon State University. Extension Service, Lins, Ryan D., and Colquhoun, Jed

Abstract:

Small broomrape (Orobanche minor Sm.) is a parasitic weed that recently has become troublesome in red clover seed production in Oregon. It was identified in a single red clover seed production field in 1998, and the number of infestations increased to 15 by 2000 and 22 by 2001.

Resource Type:

Technical Report

Full Text:

in Oregon. It was identifi ed in a single red clover seed produc- tion fi eld in 1998, and the