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Musk thistle <br />page 2 <br />CONTROL <br />BIOLOGICAL ! Rhinocyllus conicus, a seed -head weevil that has naturalized and now also infests native thistles. <br />Redistribution not recommended <br />CHEMICAL <br />' Rosette <br />2,4-D (many) <br />xrwtr�r; <br />Spring <br />Aminopyralid (Milestone) <br />Fall <br />Chlorsulfuron (Telar) <br />Clopyralid (Curtail, Transline) <br />Dicamba (Banvel) <br />Metsulfuron (Escort XP) <br />Picloram (Tordon Restricted use) <br />2,4-D (many) <br />Bolt to early flower <br />Spring to early Summer <br />Aminopyralid (Milestone) <br />ChlorsuKiron (Telar) <br />Clopyralid (Curtail, Transline) <br />Dicamba (Banvel) <br />Metsulfuron (Escort XP) <br />Pieloram (Tordon Restricted use) <br />CULTURAL Prevention <br />Removal prior to seed set - Remove at least the top 2 inches of the root <br />Flowers need to be bagged and disposed of <br />MECHANICAL I I~ <br />Burning I Not recommended <br />Grazing I Not recommended <br />Mowing Early bud <br />Not effective in controlling musk thistle but may <br />improve grass growth, which may act as <br />competition <br />Grazing as a control method is ineffective <br />because livestock only eat a few flowers. Heavy <br />grazing and disturbances near water, salt, and <br />loafing areas will increase seedlings <br />Between the first appearance of pink on the Spring <br />earliest buds and brown on the pappus. <br />Plants may resprout <br />Use all chemicals according to the manufacturers label. No specific recommendation or endorsement is made or implied by listing the above <br />methods or products. <br />912017 <br />700 ?efferson County Parkway, Ste 100, Golden, CO 80401 <br />303-271-5989 <br />jeffca.us/weed-and-pest <br />