There are three ways to report tree of heaven to the MDA:
1. Use or online reporting service Report a Pest
2. Email reportapest@state.mn.us
3. Call 1-888-545-6684
Please take detailed photos of the plant, and take note of the specific location. Take precautions when handling plants by wearing gloves.
After your report submission you can expect the following:
1. MDA staff may contact you for more information to make an accurate identification of the plant.
2. If the report is positive, the tree or infestation will be mapped.
3. The MDA will work with private landowners and local governments on controlling infestations if feasible.
Management recommendations will be site specific, but these are standard considerations:
- Do not purchase and/or plant tree of heaven.
- Cutting or mowing are ineffective because these actions stimulate tree of heaven to produce large amounts of stump sprouts and root suckers.
- Cut stump herbicide applications are ineffective.
- A foliar herbicide treatment in mid- to -late summer can be effective.
- Basal bark herbicide applications can be effective.
- Hand pulling seedlings may be effective when soil is moist, and the entire root system is removed. Small root fragments can generate new shoots.
- Repeated treatments and monitoring will be necessary to successfully eradicate tree of heaven.
