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Japanese Knotweed Management Summit – August 5th, 2013

Attendees visit a site near the Tannery Pond Community Center in North Creek to observe a mock-demonstration of herbicide stem-injection and foliar spray treatments for managing Japanese knotweed.

On August 5th, 2013, APIPP organized a management summit focused on a priority, terrestrial invasive plant that has been spreading rapidly throughout the Adirondacks: Japanese knotweed. The Japanese Knotweed Management Summit took place at the Tannery Pond Community Center in North Creek. 74 individuals participated in the event, including representatives from town offices, town highway departments, the Department of Transportation, the Department of Environmental Conservation, the Adirondack Park Agency, the Regional Inlet Invasive Plant Program (RIIPP), and many interested local citizens.

Japanese knotweed (Fallopia japonica) is an invasive plant that spreads rapidly along river corridors and roadways, crowding out native vegetation and disrupting natural ecosystems. The plant was originally introduced to the Northeastern U.S. sometime during the late 1800’s as an ornamental plant that provided exceptional landscape screening.

Unfortunately, Japanese knotweed spreads predominantly by fragmentation and through vegetative growth of its robust rhizomes. This often leads property owners, landscapers, and highway crews to cut and trim the plant, which often, inadvertently, enables current infestations to spread and creates new infestations elsewhere through the transport of plant fragments and the movement of contaminated fill.

The Japanese Knotweed Management Summit was geared toward collaboration and the sharing of ideas to better understand the characteristics and spread mechanisms for this plant, and also, to share and encourage the most effective ways to treat and manage infestations throughout the Adirondacks.

Brendan Quirion, APIPP’s Terrestrial Invasive Species Project Coordinator, addressing the audience at the Tannery Pond Community Center in North Creek on the Japanese Knotweed problem in the Adirondacks, its pathways of spread, and APIPP progress in managing infestations.
George Spak, a Certified Pesticide Applicator for RIIPP, addressing the Japanese Knotweed Management Summit crowd regarding proper safety and use of herbicides and equipment.
George Spak and Paul Rischmiller (Invasive Plant Control, Inc) giving some final tips on how to effectively treat Japanese knotweed with the use of herbicides

Thank you to all those who attended this event, the Tannery Pond Community Center in North Creek for hosting, and Paul Smith’s College for providing lunch and refreshments.

Please visit our website,, for more information and/or to view slide shows of the presentations given during the Japanese Knotweed Management Summit.

There is no “silver bullet” in the fight against invasives in the Adirondacks, but through the collaboration of ideas, partnerships, and innovative initiatives, we are well poised for success!

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