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Browsing by Subject "Noxious weeds -- Control -- Oregon"
Now showing items 1-13 of 13
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Scotch, French, Spanish, and Portuguese brooms were introduced into the western United States from Europe and the Mediterranean region in the mid- 1800s to stabilize mine tailings and other erosion and for landscapin ...
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Butterfly bush is difficult to control. If the infestation is only a few small plants, pulling and digging are effective. For larger plants, chemical control may be needed. If butterfly bushes are in riparian areas or ...
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Despite its common name, Canada thistle is not native to Canada; rather, it is from the temperate regions of Eurasia. It is an aggressive, creeping perennial that reproduces from seed and from vegetative buds in its ...
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The effects of defoliation on yellow starthistle (Centaurea solstitialis L.) reproductive capacity (2001-06-12)Yellow starthistle (Centaurea solstitialis L.) is an introduced Asteraceae that has become established on 10 million acres in the Pacific Northwest and California. This weed functions as an annual or short-lived perenn ...
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)English ivy is a trailing or climbing vine in the ginseng family, native to Europe and brought to America by early colonists. It is commonly cultivated as a groundcover and is widespread in the Pacific Northwest, wher ...
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Gorse is a spiny, evergreen shrub native to the Mediterranean region. It was introduced on the West Coast of the United States as an ornamental in the late 1800s. Gorse was first found in Oregon in Benton County in 19 ...
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Himalayan blackberry, also known as Armenian blackberry, is a widespread invasive species in western Oregon and also grows in some eastern Oregon riparian zones. Commonly found in riparian areas, it also grows along roa ...
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Knapweeds are a serious problem in Oregon because they vigorously invade disturbed or degraded sites and form dense populations that exclude native and desirable plant communities, causing economic and ecological losse ...
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Japanese and giant knotweeds were introduced to North America in the late 1800s as ornamentals but soon escaped into the wild. They are particularly invasive along streams, roadsides, and waste areas. Large, spreading ...
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(Corvallis, Or. : Extension Service, Oregon State University, 2006-09)Himalayan blackberry (Rubus armeniacus, formerly Rubus discolor and Rubus procerus) is a European shrub that was introduced in the United States as a crop in the late 19th century. It escaped cultivation and has since i ...
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Slender false-brome is a perennial grass species native to Europe, Asia, and North Africa. The species has exceptionally wide distribution, occupying forested and open areas at a variety of aspects and elevations. Pop ...
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Tansy ragwort is a member of the sunflower family and is native to much of Europe, Asia, and Siberia. In the United States, it was recorded first in California in 1912, then in Oregon in 1922.
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([Corvallis, Or.] : Oregon State University, Extension Service, 2008-09)Yellow starthistle, a native of the Mediterranean region, arrived in this country in 1869 as a contaminant in alfalfa seed. It is a strong invader of disturbed areas, rangelands, and roadsides and thrives in areas of ...
Now showing items 1-13 of 13
