Southeastern Wisconsin Invasive Species Consortium, Inc.


Shop Local

2016 On-the-Ground Efforts

SEWISC Assistance Program

We strive to provide resources for control of invasive species and establishment of native communities in Southeastern Wisconsin.  This year, SEWISC had the opportunity to assist more than 20 organizations, agencies and homeowners through funding from EPA/USFS Great Lakes Restoration Initiative, We Energies Foundation and Wisconsin Department Of Natural Resources.  Invasive species controlled and managed through these efforts include: common and glossy buckthorn, invasive honeysuckles, multiflora rose, black locust, burning bush, oriental bittersweet, Japanese knotweed, Japanese barberry, garlic mustard, dame’s rocket, autumn olive, hairy willow herb, wild chervil, lesser celandine, giant hogweed and common reed grass.  Check our website for 2017 Assistance Funding application details in early January.

SH July5 17 1024x768 UCP Pull 5 15 16 1024x768



SEWISC 2016 Annual Symposium

Invading Swine, Swans and Worms - Oh My!

Our 9th Annual Education Symposium was informative and fun!  This year’s guest speakers, Dan Hirchert and Bernadette Williams, shared information regarding exotic animal species which are invading our region. Early detection, identification and prompt best management techniques will reduce the negative impacts of these unwelcomed critters.  Symposium attendees celebrated this year’s Sweat Equity Award Winner, Ken Solis who diligently protects our Milwaukee County Park Natural Areas.  Everyone enjoyed local food refreshments and twelve lucky raffle winners returned home with nearly $1,400 in prizes!  Mark your calendars for the 10th Annual Education Symposium:  November 15, 2017.

DSCN3646 756x1024 DSCN3651 1024x579


Where Ecology Meets Economy – Season 4

Sharing ideas to provide sustainable pollinator habitat

In partnership with Johnson’s Nursery, Inc. ™ we hosted another networking opportunity for land managers, nurserymen, arborists, landscape architects and many other professionals. This fourth event featured presentations, panel discussions, plus educational tours and workshops sharing ways the green industry and land managers can work together to provide sustainable pollinator habitat. Speakers for the event included: Liz Meils, Mike Murray, Tim Power and Andy Stahr.

20160921 092038 20160921 150512


National Invasive Species Awareness Week

Raising awareness across the nation

NISAW logo09National Invasive Species Awareness Week (NISAW) is scheduled for February 27 - March 3, 2017 and according to experts with the Weed Science Society of America (WSSA), it's a topic that deserves everyone’s attention. Non-native plants, animals and pathogens can harm humans and the environment and impact our nation's economy. The damage done by invasive plants alone costs the U.S. an estimated $34.7 billion a year.

Participate in events across the nation to raise awareness and identify solutions to invasive species issues at local, state, tribal, regional and national scales. Locate an invasive species event in your state or county and plan your own event using the NISAW Toolkit - where and when it works for you!

Nine ways you can help to raise awareness:

  1. Learn about invasive species, especially those found in your region. Your county extension office and the National Invasive Species Information Center are both trusted resources.
  2. Clean hiking boots, waders, boats and trailers, off-road vehicles and other gear to stop invasive species from hitching a ride to a new location. Learn more at
  3. Avoid dumping aquariums or live bait into waterways. Learn more at
  4. Don't move firewood - instead, buy it where you'll burn it, or gather on site when permitted. Learn more at
  5. Use forage, hay, mulch and soil that are certified as "weed free."
  6. Plant only non-invasive plants in your garden, and remove any known invaders.
  7. Report new or expanded invasive species outbreaks to authorities. Here is a state-by-state list of contacts
  8. Volunteer to help remove invasive species from public lands and natural areas.
  9. Ask your political representatives at the state, local and national level to support invasive species control efforts: Sample Proclamation Declaring National Invasive Species Awareness Week

play goCheck out the: Ten Great Ways to Observe NISAW!

Remember: invasive species spread on the things that people move and pack. Do your part and always make sure you're not packing a pest. Learn more at Hungry Pests

"Though the impact of invasive species is profound, there are important steps we can take to manage infestations and prevent their spread," says Lee Van Wychen, Ph.D., director of science policy for the WSSA. "It all begins with awareness."  To learn more about how you can participate, visit: NISAW.


Got Garlic Mustard?

Organize a 2017 Pull-A-Thon Team

Get an early start on your seasonal garlic mustard control and raise funds for long-term control by planning to join the Southeastern Wisconsin 2017 Garlic Mustard Pull-A-Thon, an annual event where we encourage folks throughout southeastern Wisconsin to protect the woodlands of their neighborhoods by pulling this invasive plant.

The pull-a-thon is a friendly competition, a fundraiser, and a way for people to join together and have a positive impact on their environment. Our natural areas will only avoid damage from invasives with a long-term sustained commitment to invasives control.

Visit our website for this year’s Pull-A-Thon results: 2016 SEWISC Pull-A-Thon Results.  And watch for the 2017 pre-event details in February.   If you would like to volunteer as a Team Leader in 2017 and add your worksite location to our event, please email us at: .

got garlic mustard


Vietnamese Parsley

A New Invader

vietnamese parsleyA new invader of aquatic and riparian wetland habitats has recently been discovered in southeastern Wisconsin. Vietnamese parsley (Oenanthe javanica, also known as Java water-dropwort or water celery) reproduces via seeds and runners (stolons), which may extend into waterways and break off, spreading fragments downstream that can establish new patches.

Vietnamese parsley is most easily detected and identified during its August and September flowering period, which is later than most, but not all, of its relatives in the carrot family. Identification is relatively difficult, because Vietnamese parsley is not yet included in regional floras and field guides.

Vietnamese parsley occurs in wet riparian areas, marshes, and areas of shallow, slow moving or still water in full sun to partial shade. It was first reported in Wisconsin as an escape from an artificial pond near Brodhead, where it had been planted as an ornamental. It is also widely used as a vegetable in Asian cuisine.

Invasions of Vietnamese parsley are capable of choking streams and displacing native riparian vegetation.   Wisconsin Species Assessment Groups were assembled recently to recommend a legal classification for each new species considered for NR 40 (Wisconsin’s Invasive Species Rule). They recommended that Vietnamese parsley be classified as prohibited based upon a literature review developed by the department.

vietnamese parsley 2Where substrates are loose and all fragments can be collected and disposed of, pulling or digging plants may be an effective control. However, this may not be practical for large populations. Given how new Vietnamese Parsley is as an invader in North America, there are few past control efforts from which to learn. However, good results may be achieved with aquatic formulations of translocating herbicides. Near Broadhead, a July application of 4 oz. AquatNeat® (glyphosate) concentrate and 1 oz. Habitat® (imazapyr) concentrate per gallon of water resulted in 75% efficacy after one treatment. Whether mechanical or chemical, control efforts should be followed by monitoring and spot-control.

SEWISC is currently working with the Wisconsin Department of Natural Resources (WDNR) to acquire funding for control efforts in 2017. At present, Vietnamese parsley is known to occur in a tributary to the Milwaukee River in northern Milwaukee County and several locations along the Bark River near Dousman in western Waukesha County. Help us identify any additional populations in southeastern Wisconsin and expedite early detection and rapid response efforts. Report any populations of this invading plant immediately to the WDNR. Digital photographs of leaves, stems, and flowers or fruits aid in the verification of reports of this species.