6 Responses to Japanese Knotweed: SW Bike Path Status Report

  1. Alan says:

    So you might be able to call Japanese knotweed a sort of northern version of kudzu, to give it a more colorful description? Were the contractor’s activities along the path last year only a one-time thing, or are they returning this year to continue their attempt at erradication?

    • Steve Glass says:

      Hi Alan, Good comparison; but I hope we still have a chance to stop knotweed. The contractor is supposed to return but I don’t know when

      Steve Glass Restoration Ecologist Blog: wingrasprings.wordpress.

  2. Pingback: City to Continue Weed Control on SW Bike Path | WingraSprings

  3. I was so excited when the city put out the RPF to control Japanese knotweed and other weeds along the SW bike corridor, but I have been so disappointed in the results so far. There ARE effective methods for controlling this species, but as you said, just cutting them down is a bit waste of taxpayer money. In fact, it could make the problem worse if some of the cut fragments got moved around and rooted elsewhere! Seems they have done some work on the knotweed this spring, but it seems like its pretty inconsistent, treating different areas differently and skipping plants just a few feet away from ones that they treated, plus they haven’t even touched some of the largest colonies.

    A foliar application of Milestone or similar herbicide during the bloom period is about 90-95% effective at killing Jap. knotweed. We have had great success with this over the past couple of years at sites in Shorewood Hills and Maple Bluff, even on large colonies. It takes a couple repeat treatments over 2-4 years to completely kill a plant, but it is possible, all is not lost!

    • Steve Glass says:

      Hi Frank,
      Thanks for your comment and suggestion. The contractor returned to the job in the past few weeks and continues to cut stems and wait to treat re-sprouts in the late summer. But as you say there are superior alternatives. I’ll pass on your recommendation for use of a foliar Milestone application.

  4. Pingback: Japanese Knotweed Along Madison’s SW Bike Path: Update on Control Efforts | WingraSprings

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