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Bull thistle (Cirsium vulgare) and Scotch thistle (Onopordum acanthium) are biennials, <br />and can be treated the same as musk thistle. These weeds are also best controlled with <br />Milestone at 5-7oz/acre, applied in late summer -early fall on first year rosettes or early in <br />the season of the second year before rosettes bolt. <br />Cheatgrass (Bromus tectorum) is a highly invasive annual or winter annual grass, and is <br />the subject of considerable research on effective controls due to its impact on Great Basin <br />rangelands. Aminocychlopyraclor as Matrix has been found to be effective when <br />applied according to specific label directions. Roundup glyphosate), Journey. Plateau, <br />and Landmarke may also be effective when used according to label directions. <br />Tarweed (Madia glomerate) is a broadleaf annual. They can be controlled by either <br />using Round -up, where grass loss can be tolerated, or disked before flowering. Because <br />tarweed is an annual and prevention of seed production is the primary goal, an <br />application of 2 qts/acre of 2,4-D 4 lb amine can effectively dessicate the weed and <br />prevent seed maturity. Tarweed can be controlled with Escort at 3/4 oz per acre with a <br />good surfactant. This weed will typically disappear once good grass cover is established. <br />Other Noxious Weeds not listed here: Glyphosate (Roundup) is often, but not always <br />effective when treating individual plants or when loss of grass is not a problem. The <br />Routt County Weed Supervisor will work with the permit holder to develop specific <br />control measures needed to control any noxious weeds found in the future on this <br />property but not described here. <br />6 <br />