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Filtering by: Subject Hypericum perforatum -- Control

St. Johnswort : scientific name, Hypericum perforatum : common names, Klamathweed, goatweed

Creator:

Zimmerman, Martin (Martin Joseph) and Oregon State University. Extension Service

Abstract:

Published April 1963. 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
St. Johnswort, Hypericum perforatum L.

Creator:

Fitzsimmons, Jim P., Burrill, L. C., Oregon State University. Extension Service, Washington State University. Cooperative Extension, University of Idaho. Cooperative Extension System, and United States. Department of Agriculture

Abstract:

St. Johnswort (Hypericum perforatum), also called Klamath weed and goatweed, was introduced from Europe and was found in California about 1900. It was a major pasture weed west of the Cascade mountains from Tacoma south to central California until the successful introduction of the chrysolina beetle, a leaf-eating insect.

Resource Type:

Technical Report