02-16-2010 Planning Commission Packet

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� • � 1 1 �� Methods for Invasive/Non-native Species Control .IAN 18 2010 1) Mowing C�NaF�RONp During the first two years of plant establishment mowing at a height of 6 to 10 inches where feasible, during the growing season, will reduce competition from annual weeds. Mowing events should occur twice a year mid-July and again in early September) prior to the seed head development of reed canary grass. Mowing allows light to reach the sma11 native seedlings and reduces cornpetition for water and soil nutrients from weeds. 2) Spot application of herbicide Individual invasive plants (including cattail) can be eradicated through wick application or spraying of herbicide. Rodeo or other Minnesota. Department of Natural Resources approved herbicides for use near /in water bodies should be applied by a licensed applicator at the appropriate times to control individual plants. 3) Eradicate large infestations with herbicide The most effective method of eradicating large colonies of plants is to wick-apply or spray them with herbicide. Use Rodeo when spray may come in contact with water and Roundup in upland situations. Repeated application will probably be necessary. Apply to green, actively growing foliage. Herbicides can effectively control herbaceous non-native vegetation when applied in spring or fa11. Take great care not to apply herbicide to surroundang native plants. A very sma11 amount of herbicide can kill a plant. 4) Cut woody stems and apply herbicide to wound All woody plants greater than 1/4-inch in diameter that cannot be hand-pulled should be cut down to expose the vascular tissue, or cambiu.m. Herbicide painted on the cambium will be transported within the plant, eventually killing it. Cut the woody plant at a height that ensures the native herbaceous plants will not have contact with the stump and herbicide. This procedure should not be conducted while woody plants are dormant.