Index Catalog // ScholarsArchive@OSU

Start Over

Filtering by: Creator Stafford, K. Degree Level Master's Subject Douglas fir -- Diseases and pests -- Oregon

Host suitability studies of Douglas-fir and white alder to the gypsy moth

Creator:

Joseph, Gladwin

Abstract:

Douglas-fir, Pseudotsuga menziesii and white alder, Alnus rhombifolia, species that are prevalent in the Pacific Northwest, were fed to larvae of the gypsy moth, Lymantria dispar L. Gypsy moth larvae from different familial lines (egg masses) from a single geographic population were evaluated on these hosts. The larvae were fed...

Resource Type:

Masters Thesis

Full Text:

condensed tannins (Stafford and Lester 1981). Condensed tannins are known to be detrimental in a dose
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