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Page 6 of 23 Appendix 1 <br />Ally-Escort (metsulfuron) or Telar (chlorsulfuron) also can be used. Use Telar in noncrop areas only and <br />. Ally-Escort in pastures, rangeland or noncrop areas. Research from Colorado State University and the <br />University of Nebraska shows that Telar or Ally-Escort prevents or dramatically reduces viable seed <br />formation when applied in spring, up to early flower growth stages. The latest time to apply these <br />heri~icides is when developed terminal flowers have opened up to the size of a dime. <br />Apply Telar at I ounce/A or Ally-Escort at 0.5 ouncelA. Add a good agricultural surfactant at 0.25 percent <br />v/v2 to Ally-Escort or Telar treatments or control is inadequate. <br />Plumeless thistle <br /> <br />~M;t~. <br />y' X <br />a`~1 <br />Cultural control of Plumeless Thistle <br />Maintaining pastures and rangeland in good condition is a primary factor for Plumeless thistle <br />management. To favor pasture and rangeland grass growth, do not overgraze. Fertilize only when necessary <br />and according to soil testing recommendations. To successfully manage Plumeless thistle, prevent seed <br />formation. <br />Mechanical control of Plumeless Thistle <br />Plumeless thistle will not tolerate tillage and can be removed easily by severing its root below Bound with <br />• a shovel or hoe. Mowing can effectively reduce seed output if plants are cut when the terminal head is in <br />the late-flowering stage. Gather and burn mowed debris to destroy any seed that has developed. <br />Management <br />