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Several methods are available for controlling musk thistle including chemical, biological, mechanical, and cultural. These are outlined in more detail in the fact sheet linked below. Ultimately, the goal of any control practice should be to prevent seed production. The first line of defense against musk thistle invasion on range and pasture is good grazing management. Use stocking rates designed to avoid overgrazing that maintain a competitive cover and prevent bare ground. Prescribed burning in the late spring just as the grasses are starting growth will not directly kill musk thistle, but does stimulate the warm-season grasses that help prevent musk thistle from becoming established. Cool-season pastures should also be managed to maintain vigorous competitive stands. Proper stocking rates, proper season of use for grazing or haying, and maintenance of soil fertility will generally reduce the likelihood of musk thistle invasion in cool-season grass stands.
For more information, refer to Musk Thistle Control.
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