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Insects associated with black stain root disease of Douglas-fir in western Oregon

Creator:: Witcosky, Jeffrey John
Abstract:: The root systems of Douglas-fir trees infected with Verticicladiella wagenerii and assigned by crown color and terminal growth characteristics to several stages of decline were excavated at three widely separated sites in the Coast Range of Oregon. Data were gathered on insect species present, extent of colonization of the root...
Resource Type:: Masters Thesis
Full Text:: Douglas-fir in western Oregon AN ABSTRACT OF THE THESIS OF Jeffrey John Witcosky for the degree of

Environmental factors influencing the rate of spread of Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir

Creator:: Angwin, Peter A.
Abstract:: Studies to identify the environmental factors that influence the rate of ectotrophic mycelial growth of Phellinus weirii (Murr.) Gilbertson along Douglas-fir roots were undertaken both in the laboratory and in the field. The effects of soil pH, nitrogen, moisture, temperature, microorganisms and bulk density were investigated. In the lab, the...
Resource Type:: Masters Thesis
Full Text:: Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir AN ABSTRACT OF THE THESIS OF Peter Andrew

Some silvicultural impacts of Phellinus weirii on a managed forest in the interior Coast Range of Oregon

Creator:: Lawson, Thomas Taylor
Abstract:: Phellinus weirii, the cause of laminated root rot, is considered the most destructive root rot of Douglas-fir, but little is known about the damage it causes, to a forest. The objective of this study was to determine silvicultural impacts of P. weirii on a managed forest. A survey located and...
Resource Type:: Masters Thesis

The relationship of aspect and topographic position to the occurrence of Douglas-fir bark beetle damage in western Oregon and southwestern Washington

Creator:: Rossheim, John David
Resource Type:: Masters Thesis

The relationship between snow breakage in Douglas-fir poles and infection by Fomes subroseus (Weir) Overholts

Creator:: Fulcher, Aaron Darrel
Resource Type:: Masters Thesis
Full Text:: The Relationship Between Snow Breakage in Douglas-Fir

Interactions between paired cultures as a basis for differentiating compatibility genotypes of Fomes cajanderi Karst. from glaze-damaged Douglas-fir

Creator:: Adams, David Howard
Abstract:: A study was undertaken to determine the reliability of the formation of a line of demarcation between paired cultures of Fomes cajanderi Karst. as an indicator of dissimilar compatibility genotypes. The results were applied to an assay of the number and location of compatibility genotypes in each of four glaze-damaged,...
Resource Type:: Masters Thesis
Full Text:: Differentiating Compatibility Genotypes Of Fomes Cajanderi Karst. From Glaze-Damaged Douglas-Fir AN ABSTRACT OF

Decay caused by infection of Fomes cajanderi Karst : in top-broken, young-growth Douglas-fir trees

Creator:: Cahill, James M.
Abstract:: A glaze storm of exceptional severity was seen in the Corvallis area, January, 1942. The weight of ice that accumulated in the crowns of young-growth Douglas-fir trees caused widespread top breakage in many stands lying in the broad path of this storm. Early research on this phenomenon showed the majority...
Resource Type:: Masters Thesis
Full Text:: top-broken, young-growth Douglas-fir trees ABSTRACT OF THE THESIS OF James Michael Cahill for the

Tree vigor and the susceptibility of Douglas-fir to armillaria root disease

Creator:: Rosso, Pablo H.
Abstract:: The main objective of this thesis was to determine the influence of tree vigor on susceptibility to Armillaria root disease. First, the effect of thinning, fertilizing and pruning on tree vigor of four young Douglas-fir (Pseudo tsuga menziesii var. menziesi,) plantations was explored. Tree vigor was calculated by measuring wood...
Resource Type:: Masters Thesis

The effect of light intensity on Douglas-fir foliage quality : survival and development of Western spruce budworm

Creator:: Waddell, Karen L.
Abstract:: Foliage from Douglas-fir(var. glauca) seedlings grown under two light intensities was bioassayed to examine palatability to the western spruce budworm (Choristoneura occidentalis Free.). Samples were collected in Fall, Winter and early Spring to identify seasonal changes in host foliage, as evidenced by the response of spruce budworms. Fall collected foliage...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Insects associated with black stain root disease of Douglas-fir in western Oregon

Environmental factors influencing the rate of spread of Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir

Some silvicultural impacts of Phellinus weirii on a managed forest in the interior Coast Range of Oregon

The relationship of aspect and topographic position to the occurrence of Douglas-fir bark beetle damage in western Oregon and southwestern Washington

The relationship between snow breakage in Douglas-fir poles and infection by Fomes subroseus (Weir) Overholts

Interactions between paired cultures as a basis for differentiating compatibility genotypes of Fomes cajanderi Karst. from glaze-damaged Douglas-fir

Decay caused by infection of Fomes cajanderi Karst : in top-broken, young-growth Douglas-fir trees

Tree vigor and the susceptibility of Douglas-fir to armillaria root disease

The effect of light intensity on Douglas-fir foliage quality : survival and development of Western spruce budworm

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