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Page 16 of 23 <br />Perennial peperweed <br />Management <br />Appendix 1 <br />Perennial pepperweed is most often found in open, unshaded areas on disturbed, and often saline soils. It is <br />most common in seasonally wet areas from 5,500 to 9,000 feet. Areas along the South Platte River, in the <br />San Luis Valley are, and communities of the Piceance Basin of Colorado are susceptible to Perennial <br />pepperweed. Best management is to treat as soon as found. <br />Mechanical Control of Perennial Peppenveed <br />Periodic mowing and spring burning have reduced perennial pepperweed density in Utah (FEIS 1996) <br />1lerbliides: <br />Chemical Control of Perennial Peppenveed <br />Metsulfuron at the rate of 0.4i oz. ai,acre is the most effective herbicide treatment. Dicamba at 1 lb. <br />aiiacre, glyphosate at 1.5 lb. ai'acre or glyphosate }',4D at ti4 fl. oz. Product acre will control perennial <br />pepperweed. Other herbicides that proved to he effective include chlorsulftiron and imazapyr.