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' Nelson Mining Resource Integrated Noxious Weed Management Plan August 2019 Page 8 3.2 LIST B WEED SPECIES — CONTROL METHODS REQUIRED ' 3.2.1 Saltcedar/Tamarisk t Cultural—After managing saltcedar infestations, other vegetation must be established to prevent re-invasion. Competitive grasses and planted cottonwood cuttings have proven to be effective at reducing the chances of re-invasion. ' Mechanical—A bulldozer or prescribed fire can be used to open large stands of saltcedar. These methods must be followed up with an herbicide treatment of the subsequent sprouts when they are ' 1 to 2 meters tall. Chemical/Herbicides —For large stands of saltcedar that would essentially be monotypic, foliar ' applications of the herbicide Arsenal, Habitat or Arsenal plus Roundup are effective. Late summer/early fall are optimum treatment times. This is recommended for areas that have little to no desirable shrubs and trees. Biolo ical—There i;� s no recommended Biological control currently. 3.2.2 Russian Olive Cultural — After managing Russian olive infestations other vegetation must be established g g g estab shed to prevent re-invasion. Competitive grasses and planted cottonwood cuttings have proven to be effective at reducing the chances of re-invasion. Mechanical — In areas where woody native plants are present and their continued existence is desired, or for large stands of Russian olive it may be necessary to cut and treat the stumps with an herbicide. This is referred to as the cut-stump treatment. Cuts should be made within 2 inches of the grounds surface, immediately followed by an herbicide application to the cut stems. The girdling method involves making shallow, overlapping cuts into the bark around the trunk base. Use a hatchet or chainsaw to make these cuts. Then lightly spray the entire cut surface with herbicide. Chemical/Herbicides — For large stands of Russian olive that would essentially be monotypic, ' foliar applications of herbicides are effective. Late summer/early fall are optimum treatment times using this method. This is recommended for areas that have little to no desirable shrubs and trees. Biological—There is no recommended Biological control currently. 3.2.3 Canada Thistle Cultural — Establishment of selected, aggressive grasses can be an effective cultural control of Canada thistle. Good grazing management will stimulate grass growth and keep pastures healthy. ' Healthy pastures may be more resistant to Canada thistle invasion. Bare spots caused by overgrazing are prime habitat for weed infestations.