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Page 16 of 23 <br />• Perennial peperweed <br />Appendix 1 <br />Management <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 Pepperweed <br />Periodic mowing and spring burning have reduced perennial pepperweed density in Utah (FEIS 1996) <br />Herbicides: <br />Chemical Contro! of Perennial Pepperweed <br />Metsulfuron at the rate of 0.45 oz. ai/acre is the most effective herbicide treatment. Dicamba at 1 Ib. <br />ai/acre, glyphosate at 1.5 lb. si/acre or glyphosate +2,4D at 54 fl, oz. Product/acre will control perennial <br />pepperweed. Other herbicides that proved to be effective include chlorsulfuron and imazapyr. <br /> <br />