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Filtering by: Alternative title ssim PNW 109 Degree Field Botany Subject Douglas fir

Comparison of Phellinus weirdi root rot damage in a 60-year-old Douglas-fir (Pseudotsuga menziesii) stand with the damage in the preceding old-growth stand

Creator:

Tkacz, Borys M.

Abstract:

Laminated root rot of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) caused by the fungus Phellinus weirii (Murr.)Gilbertson was studied in two successive stands in the Oregon Coast Range. Damage due to the disease in a 60-year-old second-growth stand was compared with incidence in the preceding 300-year-old stand on the same site....

Resource Type:

Masters Thesis

Full Text:

shale (E.E. Nelson PNW Forest and Range Exp. Sta. U.S.F.S. unpublished data). The vegetation on the
Factors affecting inter-tree root contact and the transmission of Phellinus weirii in young-growth Douglas-fir

Creator:

Reynolds, Keith M.

Abstract:

Groups of second-growth Douglas-fir (Mirb.) Franco were excavated in plots of two to six trees on two sites in the vicinity of Cowichan Lake, Vancouver Is., British Columbia. Eleven excavation plots provided 36 trees which could be studied in pairs (a total of 50 pairs) in order to ascertain the...

Resource Type:

Masters Thesis

Full Text:

Factors to System Behavior as Revealed in the Simulations of SIMROT 2 107 VIII. LITERATURE CITED 109 IX