Index Catalog // ScholarsArchive@OSU

Creator:: Smith, Julia P.
Abstract:: Aphids are a widespread family of plant pests, whose abilities to suppress shoot and root growth are well documented for many terrestrial plants. Only a few studies have been conducted on conifer aphids of the genus Cinara. Cinara pseudotsugae are known to attack Douglas-fir seedlings, an important crop in the...
Resource Type:: Masters Thesis
Full Text:: . pseudotsugae, and may be useful as a biological control agent. Studies of its natural history and host

Creator:: Regan, Richard P. and Fisher, Glenn C.
Resource Type:: Conference Proceeding
Full Text:: OR 97331 COOLEY SPRUCE GALL ADELGID CONTROL IN DOUGLAS-FIR CHRISTMAS TREE PLANTATIONS, OREGON, 1986

Creator:: Kang, Sung-Mo
Abstract:: The fungi that cause mold and stain of freshly sawn lumber result in millions of dollars in losses to the forest products industry. Stain and mold are typically prevented by either kiln drying or by application of a topical fungicide. While these treatments are effective, kiln drying is costly and...
Resource Type:: Masters Thesis
Full Text:: biological control. One problem with this approach on western wood species such as Douglas-fir is the lack

Creator:: Maul, Theodore W.
Resource Type:: Undergraduate Thesis
Full Text:: Figure 1 and Figure 2 TABLE OF CONTENTS - Continued Page Infection Court of Trunk Rot in Douglas-fir

Creator:: Neal, Tiffany A.
Abstract:: Live western larch, Larix occidentalis Nutt., a tree species resistant to the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, produces the monoterpene 3-carene in higher concentrations compared to Douglas-fir, the preferred host of D. pseudotsugae (Reed et al. 1986). The inhibitory effects on attraction to aggregation pheromones and toxicity of 3-carene to...
Resource Type:: Masters Thesis
Full Text:: aggregation pheromones were used to stimulate ~ttack on mature, live western larch and Douglas-fir, as well

Creator:: Wilhelmi, Nicholas
Abstract:: Douglas-fir (Pseudotsuga menziesii) is a commercially and ecologically important tree species native to western North America. The foliar pathogens Phaeocryptopus gaeumannii, the causal agent of Swiss Needle Cast, and Rhabdocline species, the causal agents of Rhabdocline needle cast, are two important pathogens specific to Douglas-fir. These pathogens are highly influenced...
Resource Type:: Masters Thesis
Full Text:: Douglas-fir has likely resulted in wide variation in the pathogens and disease pressure to which

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