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Relationship between plant and butterfly community composition on upland prairies of the Willamette Valley, Oregon

Creator:: York, Melissa M.
Abstract:: Small remnants of 'natural' habitats exist today throughout much of the world. Upland prairies in the Willamette Valley, Oregon have been nearly eliminated by conversion to agriculture and other uses. As a result, very few prairies remain and at least four butterfly species that require this habitat appear to be...
Resource Type:: Masters Thesis
Full Text:: collected at 17 sites in the Willamette Valley, Oregon, 2000 107 Relationship Between Plant and Butterfly

Epichloë typhina (fungus) - Botanophila lobata (fly) interaction : an invasive "pollinator" system in its introduced range in western Oregon

Creator:: Kaser, Joseph M.
Abstract:: Epichloë typhina (Ascomycetes: Clavicipitaceae) is an endophytic fungus that infects perennial Pooid grasses and is the causal agent of choke disease. It is endemic to Europe and was inadvertently introduced into orchardgrass seed production fields in western Oregon. Choke disease, which was first recorded in Oregon in 1996, currently infects...
Resource Type:: Masters Thesis
Full Text:: EPICHLOË IN OREGON There are two recorded species of Epichloë in the Willamette Valley: E. festucae

Specificity of quantitatively expressed host resistance to Mycosphaerella graminicola

Creator:: Krenz, Jennifer E.
Abstract:: The specificity of quantitative host resistance to plant disease has long been a controversial issue. We examined interactions between wheat (Triticum aestivum) and Mycosphaerella graminicola, causal agent of Septoria tritici blotch, to determine whether specific interactions occur between host and pathogen genotypes that could be involved in eroding quantitatively expressed...
Resource Type:: Masters Thesis
Full Text:: Willamette Valley of Oregon in 1999 and 2000………………………………………………………...25 3. Percent disease severity

Effect of temperature and photoperiod on growth and development of the filbert leafroller, archips rosanus L. (lepidoptera: Tortricidae) in the Willamette Valley of Oregon

Creator:: Al-Zabidi, Ahmed Hizam, 1953-
Abstract:: Role of temperature and photoperiod on development of the filbert leafroller, Archips rosanus L., (Lepidoptera: Tortricidae) from the Willamette Valley, Oregon was studied in the laboratory and in the field. Both temperature and photoperiod had a significant influence on the developmental rate of this species from neonate larva to adult...
Resource Type:: Dissertation
Full Text:: the Willamette Valley of Oregon. Abstract approved: Professor. M. T. AliNiazee Role of

Butterfly and flower community composition among prairie-oak ecosystem habitats in the Willamette Valley, Oregon

Creator:: Powers, Breanna F.
Abstract:: Prairie-oak ecosystems in the Willamette Valley, Oregon have experienced habitat loss and degradation; most of these ecosystems are fragmented into smaller patches. Prairie-oak butterfly species, in the Willamette Valley, have decreased dramatically due to loss or degradation of habitat. More research is needed on sustaining the populations of butterflies in...
Resource Type:: Masters Thesis
Full Text:: Edge Prairie-oak ecosystems in the Willamette Valley, Oregon have experienced habitat loss

Developmental biology and phenology of the walnut husk fly, Rhagoletis completa Cresson (Diptera: Tephritidae) in the Willamette Valley of Oregon

Creator:: Kasana, Abdulmajid
Resource Type:: Dissertation
Full Text:: , Rhagoletis completa Cresson (Diptera: Tephritidae) in the Willamette Valley of Oregon AN ABSTRACT OF THE

Germination and establishment in Willamette Valley native prairie plants

Creator:: Russell, Michael C.
Abstract:: Native plants provide many ecosystem services while also having great beauty and are a valuable component of the landscape. As use of these plants in habitat restoration, agricultural insectary plantings, and home landscapes increases so does demand for information on the basic biology of a group of species that have...
Resource Type:: Masters Thesis
Full Text:: rest of western Oregon the 6 Willamette valley has extensive grasslands with remnant patches

Population characteristics of exotic plants in a Willamette Valley native prairie

Creator:: Lantz, Lisa E.
Resource Type:: Masters Thesis
Full Text:: Conservancy (1983) to list Willamette Valley prairies as one of the most endangered habitats in Oregon. My

Ion exchange membranes and agronomic responses as tools for assessing nutrient availability

Creator:: Salisbury, Steven Earl
Abstract:: Winter wheat is commonly grown in rotation with leguminous and non-leguminous crops in the Willamette Valley. For agronomic, economic, and environmental reasons it is important to understand the influence of previous crops on availability of N and other nutrients. Objectives of this study were: (1) to evaluate the effects of...
Resource Type:: Masters Thesis
Full Text:: production in the Willamette Valley of western Oregon. Growers are challenged by agronomic, economic, and

Meadowfoam (Limnanthes alba) : its research and development as a potential new oilseed crop for the Willamette Valley of Oregon

Creator:: Oregon State University. Agricultural Experiment Station, Jolliff, Gary D., Calhoun, Wheeler, 1916-, and Crane, Jimmie M.
Abstract:: Published November 1981. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: Willamette Valley of Oregon OREGON . l6198' 'TATt1i Station Bulletin 648 November 1981 Agricultural

ScholarsArchive@OSU

Relationship between plant and butterfly community composition on upland prairies of the Willamette Valley, Oregon

Epichloë typhina (fungus) - Botanophila lobata (fly) interaction : an invasive "pollinator" system in its introduced range in western Oregon

Specificity of quantitatively expressed host resistance to Mycosphaerella graminicola

Effect of temperature and photoperiod on growth and development of the filbert leafroller, archips rosanus L. (lepidoptera: Tortricidae) in the Willamette Valley of Oregon

Butterfly and flower community composition among prairie-oak ecosystem habitats in the Willamette Valley, Oregon

Developmental biology and phenology of the walnut husk fly, Rhagoletis completa Cresson (Diptera: Tephritidae) in the Willamette Valley of Oregon

Germination and establishment in Willamette Valley native prairie plants

Population characteristics of exotic plants in a Willamette Valley native prairie

Ion exchange membranes and agronomic responses as tools for assessing nutrient availability

Meadowfoam (Limnanthes alba) : its research and development as a potential new oilseed crop for the Willamette Valley of Oregon

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