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WEED CONTROL - If necessary, weed control measures will be employed for the control of noxious weed <br />species. Weeds listed on Mesa County's Noxious Weed List are of primary concern. Of the 19 listed weeds, <br />Russian knapweed (Acropti/on repens L.) and whitetop (Cardaria dra6a) are present on the proposed wetland <br />site. Tamarisk (Tamarix ramossissima), also onsite, appears as a "species recommended for control" on the Mesa <br />County list. <br />The whitetop will be treated once with Escort® in a concentration of one ounce per acre in the Spring at first <br />bloom; or alternatively, in the Spring with a solution of six ounces of glyphosate (Roundup®) plus two ounces of 2- <br />4-D per gallon of water before flowering and again after flowering. <br />Russian knapweed will be treated with atwo- percent solution of Curtail® in the Spring between bud and bloom or <br />in the Fall just prior to dormancy. <br />Tamarisk will be controlled at any time of year by cutting trees with trunks greater than two inches in diameter to <br />within six inches of the ground and treating the cut stumps with a mixture of Garlon 4® and avegetable-base crop <br />oil in a 25% solution. For trees with trunk diameters of less than two inches, a basal spray technique with a 20% <br />solution is effective. Alternately, stands of tamarisk may be bulldozed or burned one year and the re-sprouts <br />treated with the basal spray technique the following year. <br />The stockpiled overburden and topsoil will be monitored for noxious weed growth and treated, if necessary, <br />according to the above schedule. <br />Revised January, 2003 <br />