Japanese Knotweed: An Emerging Invasive Weed in Jo Daviess County

The stalk of Japanese Knotweed resembles bamboo. (c) www.eattheweeds.com.

JDCF staff has observed a new invasive weed, Japanese Knotweed (Fallopia japonica/Polygonum cuspidatum), around streams and drainage ditches in in the Galena area. Invasive species, often plants or animals arriving from other continents, have created huge challenges for land managers of conservation lands in NW Illinois. If left untreated, Japanese Knotweed could spread further around the county causing ecological and economic harm. JDCF staff would like to halt the spread of Japanese Knotweed by treating populations throughout the county with no cost to the landowner!  JDCF secured a grant from the National Fish and Wildlife Foundation to assist in this effort.

Japanese Knotweed was originally introduced to North America from Asia as an ornamental plant. Once established it spreads rapidly creating a density that out-competes native species reducing the health and wildlife habitat in forests, stream corridors, and wet prairies. Japanese Knotweed grows well in moist areas such as stream banks, roadsides, and floodplains. It can reach 3-10ft tall with large triangular to heart shaped leaves and multiple spikes of white flowers. The most identifiable characteristic is the thick jointed stem that is often a reddish purple color.  If you believe you have Japanese Knotweed on your property please contact JDCF at striketeam@nulljdcf.org or (815) 858-9100.

Upcoming Events

Fall Forest Walk

September 30 @ 1:00 pm - 3:30 pm

With fall on the way, the appearance of trees changes significantly and identifying them can be tricky – unless you know your bark, berries, and  nuts. Join us to celebrate the change of season with a Fall Forest Walk at Schurmeier Teaching Forest. This free event will be led by expert staff and volunteers from […] Read More

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Creatures of the Night: Owls & Bats

October 21 @ 10:00 am - 12:00 pm

Learn about some of our nocturnal friends, owls and bats. This program, geared towards a middle school grade level, introduces the life cycle of the owl and its food and habitat. It also identifies the characteristics that make the owl a perfect predator and member of the raptor family. Participants will get to dissect an […] Read More

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The Return of Large Predators to the Midwest

November 11 @ 12:30 pm - 4:30 pm

Our keynote speaker will be Adrian Wydeven, nationally-renowned timber wolf expert, based at the Sigurd Olson Environmental Institute at Northland College, in Ashland, WI. For more than 50 years, there were NO sightings of wolves in Illinois, but with declining habitat north of us, wolves have again been sighted since 2002, more in Jo Daviess […] Read More

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Owl Prowl

December 2 @ 5:00 pm - 8:00 pm

Join us for an evening owl-prowl hike at Casper Bluff.  This year, we will be joined by the Northern Illinois Raptor Rehab and Education Center who will bring along a few of their feathered friends for an educational program and meet and greet with live owls before we head out on the trails. There will be […] Read More

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