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United Companies <br />Weed Control Program <br />Revised May 2008 <br />Weed control is an important part of United Companies overall program to maintain <br />company operating sites whether they be plantsites or gravel pits. This program mainly <br />targets plants that have been classified as noxious weeds by the State of Colorado and <br />the counties where United Companies has facilities. This program includes a section for <br />control of Tamarisk and Russian Olive. <br />According to State law (CRS 35-5.5, the Colorado weed Management Act), noxious <br />weeds must be managed. Integrated Weed Management is a strategy that has been <br />suggested as the structure for control programs. Elements of this approach include:. <br />Preventing the encroachment of noxious weed species into un-infested areas. <br />Detecting and eradicating new weed species <br />Containing large-scale infestations <br />Controlling large-scale infestations using an integrated approach <br />Revegetation <br />United sites have active control measures for noxious weed species. The program <br />consists of a competent qualified weed control specialist treating each location a <br />minimum of twice a year. Several locations receive three treatments a year. <br />The following is a description and explanation of targeted weed species.. <br />Hoary Cress - Hoary Cress is a creeping perennial which needs to be managed early in <br />the season. This plant should be treated with Escort XP @ 1oz./acre when it is in the <br />bolt to early bloom (cauliflower) stage. Retreatment of this plant may be required in the <br />fall regrowth phase. <br />Russian Knapweed - Russian Knapweed is a creeping perennial and should be <br />controlled twice during the season. The first treatment should occur in the bud stage <br />with Milestone @ 6 oz./acre. The fall regrowth treatment will use Redeem R&P @ 24 <br />oz./acre when the water table is at its lowest. <br />Perennial Pepperweed - this plant is also a creeping perennial and will be controlled by <br />using Telar DF or Escort XP @ 10z./acre in the bolt to early bloom stage. A fall <br />retreatment may be necessary using either of these herbicides.