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Creator:: Filip, Gregory M.
Abstract:: Root rot caused by Armillariella mellea creates roughly circular disease centers of infected dead and dying trees in the younggrowth ponderosa pine forest under study. Research objectives concerning chemical control of the disease were: 1) to test the effectiveness of certain chemicals in protecting living pines adjacent to disease centers...
Resource Type:: Dissertation
Full Text:: infected dead and dying trees in the young- growth ponderosa pine forest under study. Research objectives

Creator:: Fuller, Lloyd Randolph
Abstract:: Armillariella mellea (Vahl. ex Fr. ) Karst. was grown aseptically in hazel stems (Corylus cornuta var. californica) which were used in the forest to infect 290 ponderosa pines (Pinus ponderosa Laws.) which had been "stressed" in five different manners plus two control groups. All trees were inoculated twice giving a...
Resource Type:: Dissertation
Full Text:: Discussion 87 V. Internal mycoflora of healthy and declining lateral roots of ponderosa pine on pumice

Creator:: Beckman, Kent Mardsen
Abstract:: Longevity and germination of seed of western dwarfmistletoe (Arceuthobium campylopodum Engelm. f. campylopodum) of ponderosa pine (Pinus ponderosa Laws.) was investigated to determine: 1) the influence of humidity and temperature on seed viability and deterioration during storage; 2) the physiology of seed dormancy; 3) the composition of seed reserve food...
Resource Type:: Dissertation
Full Text:: pine (Il3"" ponderosa Laws. ) was investigated to determine: I) the influence of humidity and

Creator:: Cooley, Sally Joan
Abstract:: Root rot due to Armillariella mellea (Vahl. ex Fr.) Karst. is unusually severe in ponderosa pine near Glenwood, Washington. Isolate relations, clonal variability, vegetation patterns, and climate were examined in relation to severity of disease in this area. Ninety-one isolates from 70 infection centers were examined. Pairings of neighboring isolates...
Resource Type:: Masters Thesis
Full Text:: in relation to vegetative cover and severity of root rot in Ponderosa pine AN ABSTRACT OF THE

Creator:: Shaw, Charles G. (Charles Gardner) 1948-
Abstract:: Root rot of ponderosa pine caused by Armillaria mellea was studied in a pine forest that had been under management for 30 years in Klickitat County, Washington. Information sources included disease survey, detailed observation and description of specific disease situations, and examination of roots in situ and removed. Roughly circular...
Resource Type:: Dissertation
Full Text:: trees on A. mellea- infected and noninfected plots. Ponderosa pine stocking by size class on infected

Creator:: Harvey, George M.
Abstract:: In 1967, Lophodermella morbida Staley and Bynum, a recently described hypodermataceous needle-cast fungus, became destructively epidemic in a knobcone pine (Pinus attenuata Lemm.) plantation in Del Norte County, California, and in several ponderosa pine (P. ponderosa Laws.) plantations in western and southwestern Oregon. This thesis presents information on this currently...
Resource Type:: Dissertation
Full Text:: in Del Norte County, California, and in several ponderosa pine (P. ponderosa Laws. ) plantations in

Creator:: Laird, Peter Paul
Abstract:: This study concerns factors affecting production and survival of ascospores of Elytroderma deformans (Weir) Darker, a needle cast of ponderosa pine (Pinus ponderosa Laws.). The results show that summer cooling and a reduction in host vigor delays and diminishes the number of fertile hysterothecia produced. Evidence is offered for classification...
Resource Type:: Masters Thesis
Full Text:: localized areas in the ponderosa pine forests of Oregon, Washington, Idaho, Montana and California. The

Creator:: Loman, August Adriaan
Resource Type:: Masters Thesis
Full Text:: and 22.0 degrees C. in subcortical areas of the lower portions of pieces of lodgepole pine slash at

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