Integrated control of musk thistle using an introduced weevil
Abstract
"Musk thistle, Carduus thoermeri* Weinmann, is a European weed introduced accidentally into the Eastern seaboard of the United States in the mid-to late-1800s. It has since spread throughout most of North America, where it has become a weed of considerable economic importance. The first report of an infestation of musk thistle in Missouri came from Palmyra (Marion County) in 1941. Its status as a weed pest in Missouri was recognized in the early 1960s, when it became abundant in pastures, primarily in northwest and south central Missouri. By 1979, musk thistle was declared a "noxious" weed through Missouri state statute. Its proliferation (Figure 1) is caused by airborne seed dissemination and the movement of seed-contaminated hay to uninfested areas."--First page.
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