Think you  have hwa on your property?

Fill out the survey permission form.  The West Michigan Cooperative Invasive Species Management Area and GEI consultants are conducting surveys to detect infestations throughout West Michigan. If your property is identified as a high at-risk location it may qualify for a free site visit to assess HWA presence on your hemlock trees.

Attend an HWA Public Information Session

Public Information meetings are meant to introduce communities to the invasive Hemlock Woolly Adelgid while offering the most recent updates to the efforts being taken to report, survey and control infestations. Residents will have the opportunity to ask questions and provide feedback on locations of hemlock stands. Learn more about upcoming meetings here. 

You have identified HWA on your property. Now what?

  1. Report it to us. Our local task force is mapping the pest throughout Michigan. Your report will help us treat surrounding areas.
  2. Join our collective to fight this pest. Our local task force is working to secure funding to help ease the burden of treatment cost on land owners. Working together, we can decrease the cost of treatment and increase the chances of success in not only saving your trees, but the trees throughout the state and midwest. We are committed to responsible treatment.

If you would like to treat this pest on your own…

3. Contact a reputable company who has experience in HWA treatment.

Here are links to help you find an arborist near you:

Arboriculture Society of Michigan

Trees are Good

More information about HWA treatment and insecticides via MSU Extension – Written by: Deborah G. McCullough, Professor, Dept. of Entomology and Dept. of Forestry, Michigan State University

4. Even if you are treating on your own, please make a report to us. Your data will help us treat the pest throughout the state, so our forests are not devastated. We will not share your personal information.

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ADDITIONAL Actions

Prune your hemlocks above driveways and parking spaces

  • If you have hemlock branches that overhang your driveway or parking spaces, prune the branches high enough that service vehicles, cars or RV’s won’t touch or brush up against the branches.
  • If you have hemlocks in your yard, prune branches high enough that a lawn mower or other lawn equipment cannot touch or brush up against the branches.
  • If possible, burn or bury branches to ensure HWA mortality.
  • If burning not possible, drench branches with soapy water (1/4 cup per gallon) or cover the branches with a clear plastic tarp for 3 weeks (if temperature is above 50°F).