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Filtering by: Creator Cowling, Ellis Brevier, 1932- Degree Field Botany and Plant Pathology

Fungal and bacterial associations in heart rots of Abies concolor (Gord. and Glend.) Lindl. and techniques for estimating damage in southwestern Oregon

Creator:

Aho, Paul E.

Abstract:

Infection courts for microorganisms invading white fir heartwood were determined to be primarily branches and basal wounds. Of 11 hymenomycetes isolated from infected trees, only four: Echinodontiurn tinctorium, Phellinus chrysoloma, Pholiota adiposa, and Hericium abietis were of major significance in terms of frequency of infection and damage caused. Two or...

Resource Type:

Dissertation

Full Text:

role of nitrogen in wood deterioration is summarized by Cowling and associates (Cowling and Merrill
Pathological and ecological aspects of decline and mortality of Chamaecyparis nootkatensis in southeast Alaska

Creator:

Hennon, Paul Edward

Abstract:

Alaska-cedar (Chamaecvparis nootkatensIs (D. Don) Spach) is a valuable tree that is suffering from a serious decline and mortality of unknown cause throughout southeast Alaska. Epidemiological and pathological studies were initiated to determine if a pathogen is the primary cause of this problem. By examining old aerial photographs and by...

Resource Type:

Dissertation

Full Text:

. Ecology 63:1932-1948. American Forestry Association. 1955. These are the champs. Amer. For. 61(9):31-40