The twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is a
worldwide pest of numerous agronomic and horticultural plants. Conservation
biological control of this pest can be unreliable due to asynchrony of natural enemies
and certain horticultural practices that have a direct or indirect affect on natural
enemies and the...
The primary problem of this study was to evaluate the post-high
school plans component of a high school counseling program. The
intent was to determine the effectiveness of the program component in
relation to the purpose it was designed to serve: providing information
and guidance for high school students who...
Biology of Scaptomyza apicalis Hardy (Diptera: Drosophilidae) was studied in
relation to its host, meadowfoam, Limnanthes alba, a recent oil seed crop grown in the
Willamette Valley, Oregon. Populations of flies and larvae were monitored weekly over
three consecutive crop-years beginning in 1996. Yellow sticky traps gave relative
population estimates...
The seasonal life history of the cereal stem moth (CSM), Ochsenheimeria
vacculella Fischer von Roslerstamm, (Lepidoptera : Ochsenheimeriidae) was investigated
in a commercial field of annual ryegrass in the Willamette Valley, OR from January
1993 to August 1994. Phenology of life stages, effect of temperature on eclosion, and
development of...
Research was conducted in the field and greenhouse to determine if a
kaolinite-based particle film, Surround®, would reduce colonization and early season
feeding damage in cucurbits by the Western Striped Cucumber Beetle, Acalymma
trivitattum (Mannerheim). Greenhouse studies were designed to determine effect of
particle film on cucumber dry weight production...
Forests face health threats from pests and diseases (e.g., mountain pine beetle, emerald ash borer, chestnut blight [CB], Swiss needle cast), and other issues such as climate change. Interventions such as genetic engineering (GE) have shown promise for mitigating some of these threats. CB, for example, has impacted most American...
The effects of a sublethal concentration of dieldrin (0. 2 ppb)
in the water on the growth and body composition of underyearling rainbow
and cutthroat trout held in aquaria and fed different rations of tubificid
worms or Oregon moist pellets were studied at Oak Creek Fisheries
Research Laboratory, Oregon State...
The interactions of a model synthetic liquid fuel reactant (furan) with a model
hydrodeoxygenation catalyst (clean and sulfided single crystal molybdenum)
were investigated using the following UHV tools: Auger electron spectroscopy
(AES), low energy electron diffraction (LEED), and temperature programed
reaction spectroscopy (TPRS). In addition to furan, the reactions of...