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Browsing by Author "Ross, Darrell W."
Now showing items 1-17 of 17
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Halaj, Juraj (1996-05-06)This work examined the importance of structural complexity of habitat, availability of prey, and competition with ants as factors influencing the abundance and community composition of arboreal spiders in western Orego ...
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Dodds, Kevin J. (2003-12-01)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 mult ...
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Prueitt, Sara C. (1997-07-18)Infestations of the western pine shoot borer (Eucosma sonomana Kearfott) in young stands of ponderosa pine (Pinusponderosa Lawson), were surveyed on the Deschutes National Forest. Elevation, slope, aspect, tree height, t ...
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Ross, Darrell W. (1985-03-06)The effects of six alternative site preparation treatments were compared at three different sites in southcentral Oregon. Treatments included a logged-only control, ripping, brushblading, disking, chemical, and chemi ...
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Rice, Ben (Benjamin Harrison) (2004-06-16)Invasive plants threaten ecosystems and economies worldwide. Classical biological control, introduction of specialist herbivores on invasive plants, is one of the tools employed to reduce the impact of invasive plants. ...
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Ross, Darrell W.; Oregon State University. Forest Research Laboratory (Corvallis, Or. : Forest Research Laboatory, College of Forestry, Oregon State University, 1986-07)
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Halofsky, Joshua S. (2007-06-20)According to general top-down trophic theory, in the presence of carnivores, herbivore behavior and/or densities could change and result in an overall decrease in herbivory on plant communities. In this dissertation, I e ...
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Lysak, Teresa (2000-07-31)The spruce weevil (Pissodes strobi) is a serious pest of Sitka spruce in Oregon. Weevils cause damage by killing the leader of a tree, resulting in defects such as crooks and forks that can render the tree unmerchantable ...
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Ross, Darrell W.; Solheim, Halvor (NRC Canada, 1997-01)Pole-size Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) were inoculated with two fungi (Ophiostoma pseudotsugae (Rumb.) von Arx and Leptographium abietinum (Peck) Wingf.) associated with the Douglas-fir beetle (Dend ...
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Neal, Tiffany A.; Ross, Darrell W. (1997-06-13)Pole-sized, live western larch Larix occidentalis Nutt.) were inoculated with Ophiostoma pseudotsugae(Rumb.) von Arx or Leptographium abietinum (Peck) Wingf., two blue stain fungi associated with the Douglas-fir beetle ( ...
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Kohler, Glenn R. (2007-04-23)The hemlock woolly adelgid, Adelges tsugae, is causing widespread mortality of eastern hemlock, Tsuga canadensis, in the eastern United States. In the West, A. tsugae causes negligible damage to western hemlock, Tsuga he ...
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Byrkit, Maggie K. (2004-06-11)Hemlock woolly adelgid, Adelges tsugae Annand, is a serious threat to eastern hemlock, Tsuga canadensis Carriere, in the eastern United States. Infestations of A. tsugae are spreading rapidly and tree mortality caused ...
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Strand, Tara M.; Ross, Darrell W.; Thistle, Harold W.; Ragenovich, Iral R.; Guerra, Ivonne Matos; Lamb, Brian K. (Entomological Society of America, 2012-04)An instantaneous puff dispersion model was used to assess concentration Þelds of the Douglas-Þr beetle, Dendroctonus pseudotsugae Hopkins, antiaggregation pheromone, 3-methylcyclohex- 2-en-1-one (MCH), within a 1-ha ci ...
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Grubin, Sarah M.; Ross, Darrell W.; Wallin, Kimberly F. (Entomological Society of America, 2011-12)Leucopis spp. (Diptera: Chamaemyiidae) from the Pacific Northwest previously were identified as potential biological control agents for the hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae), in the eas ...
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Duane, Maureen V. (2001-09-04)Prescribed burning is increasingly being used as a management tool to reduce potential fuels on the forest floor and promote stand vigor through removal of dense, crowded vegetation. Because fire affects both the stan ...
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Ross, Darrell W.; Walstad, John D. (John Daniel), 1944-; Oregon State University. Forest Research Laboratory (Corvallis, OR : Forest Research Lab, College of Forestry, Oregon State University, 1986-09)
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Neal, Tiffany A. (2004-01-15)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 ...
Now showing items 1-17 of 17
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