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Filtering by: Subject Red raspberry -- Diseases and pests Academic Affiliation Entomology

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:

Northwest and can be a destructive pest at damaging levels on red clover (Smith 1919, Johansen 1960, Fisher
Arthropod community structure in regenerating Douglas-fir and red alder forests : influences of geography, tree diversity and density

Creator:

Schaerer, Brett L.

Abstract:

The structuring of canopy arthropod communities was reviewed and investigated in relation to tree species diversity and its component factors, interspersion of different species and density of each tree species. Fifteen treatments of Douglas-fir (Pseudotsuga menziesii) and red alder (Alnus rubra) (various densities and proportions of each) were randomly assigned...

Resource Type:

Masters Thesis

Full Text:

red alder forests : influences of geography, tree diversity and density AN ABSTRACT OF THE THESIS OF