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08/31/2005 Env Bd Packet
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08/31/2005 Env Bd Packet
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Environmental Board
Env Bd Document Type
Env Bd Packet
Meeting Date
08/31/2005
Env Bd Meeting Type
Regular
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Norway maple - Invasive species: Minnesota DNR Page 1 of 2 <br />• Norway Maple (Ater platanoides) <br />• <br />• <br />Description: <br />Appearance: Large deciduous tree, dense canopy, 60' high when mature. Similar to native <br />sugar maple except: broken leaf emits milky sap, upright green flower clusters, widely <br />spreading winged fruit, regularly grooved bark, fall color always yellow. <br />Leaves: Opposite, five lobed, coarsely toothed, pointed. <br />Flowers: Flat- topped upright cluster, yellowish green, appearing with the leaves, blooming in <br />May. <br />Fruit: Widely spreading winged fruit, ripens in autumn. <br />Ecological Threat: <br />• It invades native woodlands by out - competing sugar maple as it is also very shade <br />tolerant. Wildflower diversity is reduced beneath because it forms a more dense canopy. <br />• Although sold primarily as a boulevard tree it spreads by seeds into disturbed forest <br />communities. <br />• It is native to Europe and Asia and widely sold in nurseries in the U.S. <br />Control Methods: <br />Mechanical <br />Pulling seedlings when soil is moist <br />Chemical <br />Cut -stump treatment with glyphosate; cut -stump or basal bark spray treatment around the stem <br />with triclopyr <br />http: / /www.dnr. state. mn .us /invasives /terrestrialplants /woody /norwaymaple.html 8/22/2005 <br />
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