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typically begins around the end of September. Additional treatment (spot applications) <br />of weeds can around mid -summer. <br />Tamarisk and Russian Olive <br />Mechanized Control: Mechanical removal is the use of heavy equipment to physically <br />remove tamarisk. This is accomplished in one of two ways — root crown removal or <br />mulching. Brush hogging, root crown removal, and burning lead to less successful <br />control due to the vigorous regrowth that occurs. However, cutting combined with <br />herbicide treatment can be very effective at controlling tamarisk. <br />Cutting down the shrub or tree and painting the stump surface immediately afterward <br />with an herbicide (cut stump treatment such as Garton 4, or equal) is the most effective <br />control method. This herbicide must be applied per manufacturer's recommendations, <br />but most require application within 10-15 minutes of cutting to prevent excessive <br />resprouting from the stump. All branches and trunk pieces must be removed from the <br />site to prevent sprouting. Mulching of the branches and trunks is an acceptable <br />alternate to removal. The cut stump method is best done in the fall or winter after the <br />tamarisk leaves have fallen. Rough barked plants should receive the cut stump <br />treatment. Follow up treatment of sprouts will be necessary for 2-4 years to be <br />successful. <br />Biological Control: Biological control is the use of specific organisms to control an <br />undesirable organism. For tamarisk, two bio -control agents have been identified — goats <br />and a Chinese leaf beetle. Goats will feed on tamarisk shrubs if fencing is provided to <br />limit other food sources. The Chinese leaf beetle will be released by the USDA in the <br />future, but is not available to the general public at this time. <br />Chemical control: The basal 12-18 inches of the trunks of small plants (usually around <br />1" in diameter) with smooth bark can be sprayed with herbicide (basal bark treatment). <br />For best results, apply the basal treatment when plants are dormant. Foliar sprays <br />(herbicide treatment) during the growing season must cover the entire leaf surface to be <br />effective. Tamarisk infestations in close proximity to water or wildlife habitat should be <br />sprayed with an aquatic friendly herbicide that is identified by the manufacturer as being <br />non-toxic to aquatic and wildlife. This method is most effective on small diameter trees. <br />Sprayed trees must be left standing 3-4 years to allow the herbicide to completely kill <br />the tree. Follow up spraying may be necessary 1-2 years after treatment. <br />CONTINUING WEED MANAGEMENT <br />Elam Construction shall have the Breeze Basin Gravel Pit inspected by an individual <br />knowledgeable in identifying noxious weeds. Along with the internal inspections, Elam <br />will maintain a schedule for implementing visual surveys that will be performed, twice <br />per calendar year by a professional applicator. The results of these surveys will aid in <br />determining the proper controlling measures. <br />Noxious Weed Management Plan 3 <br />