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Cornell University : Cornell Cooperative Extension
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| Yates Association |
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Poison Ivy, Japanese Bamboo, and Other Noxious |
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There are many types of noxious plants in New York State. Poison ivy, multiflora rose and Japanese Knotweed are just a few. Poison ivy is the most common of the noxious plants. It has three leaflets on each leaf. Poison ivy may grow either as a bush or a vine that can climb over fences. In the summer the leaves are shiny green. In the fall they turn a beautiful shade of red. There are over-the-counter treatments for poison ivy. In several cases a physician or dermatologist should be seen. Currently Cornell recommends the use of the herbicide glyphosate, Roundup, or Kleenup to control its spread. The best time for treatments is the late summer. Remember to read the label for the proper rate and methods of application. Japanese Bamboo or knotwood is another noxious plant. It is a tall vigorously growing plant with attractive flowers. It is useful for erosion control along banks, but should not be recommended because of its aggressive habit of spreading. Japanese Bamboo is not a bamboo but a knotwood. It may be considered ornamental. The tops of the plants are easily killed by frost leaving the tall stalks most of the winter. The leaves live until the late autumn. Most attempts to restrict its spread by mowing or digging has been unsuccessful. There are two ways to kill this vigorous weed. One way is to cover or mulch the area with two layers of soft black polyethylene. Then place blocks, boards or stones on top. Leave the covering on for a few years. The bamboo will use up its food supply and die. Another way to get rid of this pesky plant is to apply Roundup or Kleenup to the plant leaves. Thoroughly wet the leaves at the time of application. The best time for this is late summer to early fall. That is September to early October before the leaves turn color or before frost. A second treatment is recommended the following year. Read the label directions for the proper rate and method of application. Multiflora rose is another noxious plant in New York State. Its only redeeming quality is its benefit for wildlife but it spreads rampantly. The use of Roundup or Kleenup should be used to control it. The time of application is not as critical as with other noxious plants. Follow-up treatments should be applied for several years to prevent more plants from developing. Read the label directions for the proper rate and method of application. Remember when using any herbicide to follow label directions. Cornell
Cooperative Extension Yates Association |
