In 2013, the U.S. Fish and Wildlife Service (USFWS) Conservation
Objectives Team (COT) identified wildfire and the associated
conversion of low- to mid-elevation sagebrush (Artemisia tridentata)
habitats to invasive annual grass-dominated vegetation communities
as the two primary threats to the sustainability of Greater sage-grouse
(Centrocercus urophasianus, hereafter GRSG) in the...
OSU has engaged in surveying entering first year students during the summer START sessions for seven years using the CIRP Freshman Survey. Understanding the experiences, expectations, and goals of first year students aids in planning and developing services that will better meet the needs of this ever-changing population of students....
Liriomyza huidobrensis (Blanchard) is a highly destructive invasive leafminer pest
currently causing extensive damage to vegetable and horticultural crops around the world. Liriomyza
langei Frick is a leafminer pest native to California that cannot currently be morphologically distinguished
from L. huidobrensis. We used a DNA-barcoding approach, a published PCR-RFLP method,...
The Tertiary geologic evolution of the Oregon and Washington continental margin was molded by episodic periods of convergence between the Pacific oceanic plates and the North American plate. This margin is the site of a deep basin that is floored by Paleocene to lower Eocene oceanic crust and contains more...
Hazelnuts are produced in many countries, including the United States. Hazelnuts are grown on approximately 30,000 acres in the Willamette Valley, accounting for about 99 percent of U.S. production and 5 percent of world production. Turkey produces more than 70 percent of total world hazelnut production. Hazelnut species that occur...
Published May 1930. 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
An Invasive Plant Management Plan developed for Big Sur Land Trust, a non-profit conservation organization located on California's Central Coast, to guide its vegetation management activities and serve as a decision-support tool. The effort included the creation of a digital field data collection tool through Survey123 Connect, survey and data...
The spread of invasive species into the Pacific Northwest (PNW) of the United States poses a serious threat to the valuable forest resources of the region. Many insects and diseases that are a threat to these forest resources can be transported inside firewood. When campers transport their firewood across borders...
To date, no investigation of the Emerging Church Movement has made an effort to examine the environmental and political views of its members. Despite the vast research on the politics and environmental opinions of American evangelicals, little is known about where the majority of members of the Emerging Church Movement...
Zebra Chip (ZC) was confirmed in the Columbia Basin potato production area of Oregon and Washington in 2011. This is a serious disease first documented in Saltillo, Mexico in 1994. In 2000 the disease was identified in South Texas and since then, ZC has been reported in Arizona, California, Colorado,...
Proceedings of the 54th Annual Western Orchard Pest and Disease Management Conference, held January 16-18, 1980 at the Imperial Hotel in Portland, Oregon.
Drosophila suzukii (Spotted Wing Drosophila) has recently become a serious invasive pest of fruit crops in the USA, Canada, and Europe, leading to substantial economic losses. D. suzukii is a direct pest, ovipositing directly into ripe or ripening fruits; in contrast, other Drosophilids utilize decaying or blemished fruits and are...
This report documents and summarizes several decades of work on sage-grouse populations, sagebrush as habitat, and sagebrush community and ecosystem functions based on the recent assessment and findings of the USFWS under consideration of the Endangered Species Act. As reflected here, some of these topics receive a greater depth of...
Proceedings of the 77th Annual Western Orchard Pest and Disease Management Conference, held January 15-17, 2003 at the Hilton Portland in Portland, Oregon.
Proceedings of the 72nd Annual Western Orchard Pest and Disease Management Conference, held January 7-9, 1998 at the Imperial Hotel in Portland, Oregon.
Spotted lanternfly (Lycorma delicatula) is an invasive insect that was first discovered in Pennsylvania in 2014, and has since spread across the Northeastern United States. States in the Northeast have created quarantine zones, regulations, outreach, reporting systems, and management efforts for the control of spotted lanternfly. Despite states’ efforts, spotted...
Proceedings of the 73rd Annual Western Orchard Pest and Disease Management Conference, held January 6-8, 1999 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 74th Annual Western Orchard Pest and Disease Management Conference, held January 5-7, 2000 at the Imperial Portland in Portland, Oregon.
Proceedings of the 64th Annual Western Orchard Pest and Disease Management Conference, held January 10-12, 1991 at the Imperial Hotel in Portland, Oregon.
Our oceans surround us, and we depend upon them for food, transportation, and recreation. They affect us daily as they shape our climate and rattle our world with unexpected events. Current headlines indicate that they are in flux and perhaps in trouble. Coral reefs are dying due to rising ocean...
An Invasive Plant Management Plan developed for Big Sur Land Trust, a non-profit conservation organization located on California's Central Coast, to guide its vegetation management activities and serve as a decision-support tool. The effort included the creation of a digital field data collection tool through Survey123 Connect, survey and data...
Crown jellyfish (Periphylla periphylla) has become an increasing biological and economic problem for the fishermen in many Norwegian fjords. It is known to prey on a variety of planktonic species including small crustaceans like krill and calanus as well as fish eggs and larvae. Thus, this jellyfish is both a...
Understanding the impact of humans on the environment has long been a topic of scholarly interest and debate. As environmental problems mount, accounts of historic ecological conditions and the factors of change become increasingly useful. This study considers competing schools of interpretation about human impacts on ecological landscapes and develops...
Invasive nonnative plants are a serious subject for gardeners, farmers, the general public, and land managers. Understanding invasive species and how to control them is becoming increasingly important for gardeners.
Published August 1930. 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
Many non-native weed pests of food, fiber, and nursery crops pose threats to U.S. environment and agriculture. Noxious weed regulations play an important role in preventing the introduction and spread of non-native plants, thereby protecting the local biodiversity, environment and economic activities. However, these regulations could also hamper agricultural trade....
Policy makers in the United States (US), following recommendations made by the international scientific community, have drafted national emissions reduction legislation in hopes of minimizing the harmful effects of global climate change. Included in this legislation is a national cap-and-trade system with provisions for carbon offsets. Specific provisions for forest...
Rapid rates of biodiversity loss have supported the notion that Earth is experiencing a sixth major extinction event. The causes of worldwide biodiversity loss are multifaceted and context dependent. One of the most prominent groups experiencing population declines and extinctions are amphibians. Several pathogens and their associated diseases are especially...
This study explores the role of classroom use of live organisms as a pathway for the spread of invasive species. The overall guiding research question is “Are behavioral changes necessary to reduce the spread from the classroom pathway?” Using focus groups comprised of key educators, this study seeks to identify...
EXECUTIVE SUMMARY
Invasive species are one of the most significant threats to native ecosystems in the nation (Mooney, 2001). As defined by Federal Executive Order 13112, a species is considered invasive if it is not native to the ecosystem under consideration, and its establishment causes or is likely to cause...
Species declines and extinctions have been recorded across taxa as evidence of an ongoing global biodiversity crisis. Amphibians are at the forefront of these declines with nearly one third of amphibian species estimated to be at risk of extinction. While many factors contribute to population declines and extinctions, the role...
A study consisting of three parts was undertaken to investigate how variation in species interactions, population genetic structure, epidemiological parameters, and plant breeding system may influence the ecology and biological control of an apomictic invasive plant, Chondrilla juncea (Asteraceae). Interactions between natural enemy species may modify their net effect on...
Dalmatian toadflax (Linaria dalmatica) has become a prolific invasive plant of rangelands in Oregon since its arrival in the early 20th century. In 2001, the Oregon Department of Agriculture initiated a release program promoting the distribution of the stem-boring weevil, Mecinus janthinus as classical biological control agent to reduce densities...
Understanding the interplay between environmental conditions and phenotypes is a fundamental goal of biology. Unfortunately, data that include observations on phenotype and environment are highly heterogeneous and thus difficult to find and integrate. One approach that is likely to improve the status quo involves the use of ontologies to standardize...
Proceedings of the 55th Annual Western Orchard Pest and Disease Management Conference, held January 20-22, 1981 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 53rd Annual Western Orchard Pest and Disease Management Conference, held January 10-12, 1979 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 57th Annual Western Orchard Pest and Disease Management Conference, held January 13-15, 1983 at the Imperial Hotel in Portland, Oregon.
A broad definition of forestry would be the study of trees, forests, and their use by people. Modern science-based forestry is thought to have begun in the nineteenth century when Europeans looked to specialists to address questions of wood supply and extraction both in their forests at home and in...
Proceedings of the 75th Annual Western Orchard Pest and Disease Management Conference, held January 10-12, 2001 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 71st Annual Western Orchard Pest and Disease Management Conference, held January 8-10, 1997 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 70th Annual Western Orchard Pest and Disease Management Conference, held January 10-12, 1996 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 65th Annual Western Orchard Pest and Disease Management Conference, held January 9-11, 1991 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 63rd Annual Western Orchard Pest and Disease Management Conference, held January 11-13, 1989 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 69th Annual Western Orchard Pest and Disease Management Conference, held January 11-13, 1995 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 68th Annual Western Orchard Pest and Disease Management Conference, held January 12-14, 1994 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 67th Annual Western Orchard Pest and Disease Management Conference, held January 13-15, 1993 at the Imperial Hotel in Portland, Oregon.
STATEMENT OF THE PROBLEM
Document-based educational information systems require systematic
acquisition efforts that must be conscientiously undertaken to build an
information system and to keep it current. These acquisition efforts
can be influenced by several variables. The major thrust of this
research was to investigate one of these variables, namely...
The study collected data using ARCGIS Field Maps from a field survey of plants at six (6) sites in Fairfield County, CT. The sites included three (3) urban and three (3) suburban locations. A primary goal of this study was to determine whether there are differences in the extent of...
While historiography and interest in Tudor England at both the popular and specialist levels presents few signs of diminishing, there may nonetheless exist a sense that we have little left to learn about this period and its culture. A notable gap in our knowledge, however, remains regarding the mysterious disease...
The western United States has experienced large-scale degradation due to land use and land cover changes, invasion of annual grasses, and expansion of woody plants into grass and shrublands and the resultant altered fire regimes. These landscape-scale changes have coincided with declining mule deer (Odocoileus hemionus) populations, making habitat loss...
Each NWR within the U.S. Fish and Wildlife Service (FWS) National Wildlife Refuge System (NWRS) provides landscapes that contribute to conservation of wildlife and the habitats they depend on at local, regional, and national levels. The Integrated Pest Management Plan (IPMP) for a given refuge is a guide to how...
We present the geomorphology of the Eastern Samoa Volcanic Province, covering 28,446 km², and depths ranging from ~50-4000 m. A new compilation of available multibeam data reveals 51 previously undocumented seamounts, and delineates major submarine rift zones, eruptive centers, and volcanic plateaus. Moving from a regional to local scale, and...
The Multi-Institutional Study of Leadership Oregon State University Results contains information on the results of a leadership study conducted in the Spring of 2006. The theoretical underpinning of the study was the social change model of leadership. Results contain information on factors believed to influence the development of leadership skills...
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THEORETICAL AND CONCEPTUAL FRAME OF REFERENCE FOR THE STUDY................. 1
METHODOLOGY
Liriomyza sativae and L. trifolii are highly invasive leafminer pests of vegetable crops that have invaded southern China in
recent years. Liriomyza sativae was the first of these species to invade China, but it is now being displaced by L. trifolii. The
rate and extent of this displacement vary across...
The ongoing worldwide loss of biodiversity has been described as a "biodiversity crisis," "the Anthropocene defaunation," and alternatively "an extinction spasm." More recently, many scientists have come to the conclusion that we are witnesses to Earth's sixth major mass extinction event, which has the potential to fundamentally alter basic ecological...
The Pacific Coast Groundfish Fishery harvests a diverse and large grouping of fishes, but it did not become heavily fished until around WWII. This makes the groundfish fishery a comparatively young fishery. Despite its youth, it is one of the largest and most lucrative fisheries in Oregon—with a current harvest...
The goal of this analysis is to use the social construction framework to determine 1) whether the Oregon Drug Take Back Program stakeholder group can design a public policy that will ultimately reduce water contamination from the improper disposal of unused pharmaceuticals from the general public, and 2) use the...
Acute hepatopancreatic necrosis disease (AHPND), initially referred to as early mortality syndrome (EMS), is an emergent bacterial disease that has resulted in substantial economic losses for the global shrimp farming industry. Its occurrence was first reported in China in 2009, rapidly spreading to Vietnam, Malaysia, Thailand, and eventually Mexico in...