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Filtering by: Subject Thistles -- Oregon Creator Oregon State University. Extension Service

Problem thistles of Oregon

Creator:

French, Ken, Burrill, L. C., Butler, Tim, 1958-, and Oregon State University. Extension Service

Abstract:

These thistles are native to Europe and the Middle East. Some are not true thistles; for example, purple/Iberian and yellow starthistle actually are knapweeds. All of these plants, however, share a spiny, thorny, invasive nature and long-lasting, hard seed. These traits make people who use or manage land for recreation,...

Resource Type:

Technical Report

Full Text:

habitat in Oregon is open to invasion and needs to be protected. Thistle identification is key to plan
Canada thistle, Cirsium arvense [2014]

Creator:

Oregon State University. Extension Service

Abstract:

Published September 2008. Reviewed August 2014. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

Resource Type:

Technical Report

Full Text:

).—Canada thistle rosette. Photos: Berry, R.E. and L.B. Coop, IPPC, Oregon State University. Archival
Problem thistles of Oregon

Creator:

Oregon State University. Extension Service, Burrill, L. C., French, Ken, and Oregon. State Department of Agriculture

Abstract:

Published March 1989. A more recent revision exists. 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:

thistles are native to Europe. Bull and Canada thistle have been established in Oregon for many years