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

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 and current Executive Director of Heritage Preservation of the Ho-Chunk Nation.  Jon is a proud member of the Ho-Chunk Nation, a student of the Ho-Chunk […] Read More

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Fantastic Frogs & Friends Frog Walk

April 27 @ 6:00 pm - 8:00 pm

Bring the whole family to Fantastic Frogs & Friends, a frog walk beginning on the east side of the Meeker Street footbridge along the Galena River Trail in downtown Galena, IL. Learn all about frogs and toads, join us in a toast to spring, and then take part in a guided hike down the trail […] Read More

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Bluebird & Red-headed Woodpecker Workshop

April 28 @ 9:00 am - 12:00 pm

Details to come.

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JDCF’s Portage Site: A Center of Native American History

May 12 @ 9:00 am - 12:00 pm

Join archaeologist Phil Millhouse and Chloris Lowe, former President of the Ho-Chunk Nation, for a guided tour of JDCF’s Portage Preserve including the Hopewell burial mounds.  Portage is not open to the public and so this is a rare opportunity to learn about the site from our expert tour leaders.  RSVP’s to info@nulljdcf.org are required […] Read More

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