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-am) A
FS 29
Reprinted January 1977
Bull Thistle
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Scientific name: Cirsium vulgare
Biennial
Flowers
pink to purple
Lower leaf surface
with hairs
Stalk prickly
TH
Seeds plumed
Bull thistle is a coarse, prickly biennial or a
short-lived perennial. It may be distinguished from
Canada thistle by the taproot. The leaves appear
in a rosette during the first year. A flowering stem
develops the second year. Bull thistle is found in
overgrazed pastures, particularly in heavy, moist
soils.
Control: Use 1 to 1 1/2 pounds 2,4-D ester per
acre in the rosette to early-bud stage of growth.
Add a spreader-sticker.
By Martin Zimmerman, Sherman County
Extension Agent, Oregon State University
OREGON STATE UNIVERSITY
EXTENSION
PI SERVICE
Extension Service, Oregon State University, Corvallis, Henry A. Wadsworth, director. This publication was produced and distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Extension work is a
cooperative program of Oregon State University, the U. S. Department of Agriculture, and Oregon counties.
Extension invites participation in its programs and offers them equally to all people, without discrimination.