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Differential growth of roots and shoots of Douglas-fir (Pseudotsuga menziesii) seedlings infested with Cinara pseudotsugae, and population dynamics of a parasitoid wasp (Pauesia sp.) of C. pseudotsugae

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

Effects of topical application of the biological control agent Biotrek on production of bareroot Douglas-fir and western white pine seedlings, USDA Forest Service Nursery, Coeur d'Alene, Idaho

Creator:: James, Robert L., United States. Forest Health Protection, and United States. Forest Service. Northern Region
Abstract:: A preliminary evaluation of the biological control formulation of Trichoderma harzianum marketed as BioTrek® was conducted on bareroot Douglasfir and western white pine seedlings at the USDA Forest Service Nursery, Coeur d'Alene, Idaho. The biocontrol material was applied topically on seed shortly after sowing and comparisons made between treated and...
Resource Type:: Technical Report
Full Text:: TOPICAL APPLICATION OF THE BIOLOGICAL CONTROL AGENT BIOTREK® ON PRODUCTION OF BAREROOT DOUGLAS-FIR AND

Decomposition of Basamid in Douglas-fir heartwood

Creator:: Forsyth, Paul Griffin
Abstract:: Basamid^R (3,5-dimethy1-1,3,5,2H-tetrahydrothiadiazine- 2-thione) is a crystalline powder used as a soil sterilant. This fumigant acts in soil by decomposing to methylisothiocyanate (MITC), the primary active ingredient, as well as hydrogen sulfide, methylamine, and formaldehyde. In wood, Basamid decomposes too slowly to be efficacious against decay fungi unless amended with various...
Resource Type:: Dissertation

Cooley spruce gall adelgid control in Douglas-fir Christmas tree plantations, Oregon, 1986

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

Fungal colonization of Douglas-fir sapwood

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

The effect of artificial pruning on the susceptibiity of Douglas-fir to Fomes pini (conk rot)

Creator:: Maul, Theodore W.
Resource Type:: Undergraduate Thesis
Full Text:: Susceptibility Of Douglas-fir To Pomes Pini (Gonk Rot) P 343 Silviculture Report by Theodore W. Maul and

Artificial pruning as a measure of controlling Fomes pini in second-growth Douglas-fir

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

Guidelines for implementing direct control tactics against the Douglas-fir tussock moth

Creator:: Dewey, Jerald E. and United States. Forest Service. Northern Region
Resource Type:: Technical Report
Full Text:: the Forest Service a one-time variance to aerially spray DDT for control of a 1974 Douglas-fir tussock

Basic and applied studies on Douglas-fir beetle : spatial relationships of infestations, lipids and host habitat, and attraction distances of pheromone-baited traps

Creator:: Dodds, Kevin J.
Abstract:: Three studies on Douglas-fir beetle (DFB), Dendroctonuspseudotsuae, were conducted to investigate its basic and applied biology. Studies included investigations into the spatial relationship of DFB infestations over multiple years and multiple landscapes, relationships between DFB brood adult lipid levels and position of development along the length of tree boles, and...
Resource Type:: Dissertation

Evaluation of Douglas-fir mortality from Douglas-fir beetle from 1982 through 1984 following MCH application

Creator:: McGregor, Mark D., Oakes, Robert D., Meyer, Hubert E., and United States. Forest Service. Northern Region
Abstract:: A granular controlled release formulation of 2 percent MCH was applied at 4.48 kg/ha to 76.9 ha of uninfested, windthrown Douglas-fir by helicopter with a modified aerial spreader of 1.12 m capacity in May 1982. Douglas-fir beetle population reduction was 96.4 percent by late June. With one exception, treated plots...
Resource Type:: Technical Report
Full Text:: windthrown trees, and to protect adjacent high-value stands. INTRODUCTION The Douglas-fir beetle ' (DFB

ScholarsArchive@OSU

Differential growth of roots and shoots of Douglas-fir (Pseudotsuga menziesii) seedlings infested with Cinara pseudotsugae, and population dynamics of a parasitoid wasp (Pauesia sp.) of C. pseudotsugae

Effects of topical application of the biological control agent Biotrek on production of bareroot Douglas-fir and western white pine seedlings, USDA Forest Service Nursery, Coeur d'Alene, Idaho

Decomposition of Basamid in Douglas-fir heartwood

Cooley spruce gall adelgid control in Douglas-fir Christmas tree plantations, Oregon, 1986

Fungal colonization of Douglas-fir sapwood

The effect of artificial pruning on the susceptibiity of Douglas-fir to Fomes pini (conk rot)

Artificial pruning as a measure of controlling Fomes pini in second-growth Douglas-fir

Guidelines for implementing direct control tactics against the Douglas-fir tussock moth

Basic and applied studies on Douglas-fir beetle : spatial relationships of infestations, lipids and host habitat, and attraction distances of pheromone-baited traps

Evaluation of Douglas-fir mortality from Douglas-fir beetle from 1982 through 1984 following MCH application

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