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

Bonfire on the Bluff

January 27 @ 5:00 pm - 8:00 pm

JDCF and Fever River Outfitters invite you and your entire family to Casper Bluff Land & Water Reserve for Bonfire on the Bluff, a great outdoor adventure on Saturday, January 27th, 2018 from 5:00-8:00 PM.  This event offers you the opportunity to see Casper Bluff as never before. Come hike candle-lit trails, watch the beautiful […] Read More

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JDCF Annual Meeting

April 7 @ 4:30 pm - 8:30 pm

The public is invited to JDCF’s annual meeting on Saturday, April 7th, 2018 beginning with a social hour at 4:30 PM.  Our keynote speaker will be Jon Greendeer, Former President of the Ho-Chunk Nation.  The cost is $45/per person and includes a buffet dinner.  Cash bar available. Please call the JDCF office at 815.858.9100 for […] Read More

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Valley of Eden Bird Sanctuary Grand Opening

June 2 @ 9:00 am - 12:00 pm

Join us for the grand opening of our newest preserve, a 405-acre bird sanctuary donated to JDCF by former Stockton resident Nancy Hamill Winter.  To date, there have been documented sightings of over 100 different bird species at Valley of Eden. Notable Illinois species of conservation concern include the Henslow’s sparrow, bobolink, red-headed woodpecker, and northern […] Read More

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Meteors on the Mound

August 11 @ 7:30 pm - 11:00 pm

Join JDCF and the Planetary Studies Foundation to catch a glimpse of the Perseid meteor shower from atop Horseshoe Mound on Saturday, August 11th from 7-11 PM. Enjoy family-friendly activities and learn about meteors before the sunset ushers in the celestial show! The event will be cancelled if it is raining, so please check jdcf.org […] Read More

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