EAB in Minnesota's ash forests presents several unique management challenges. Black ash is our most abundant ash species and is well-adapted to growing in wet areas. Research is underway to find suitable tree species that might replace black ash, but the conversion to non-ash forests remains a major concern due to limited site accessibility and the expense of planting and growing non-ash trees on wet sites. Here are some general guidelines for landowners managing ash stands or mixed stands with a high percentage of ash:
- Avoid planting ash for ornamental, shade, or reforestation purposes
- If there is a market demand for ash, harvest it and encourage other tree species by planting or natural regeneration
- Call before you cut » Free assistance to help woodland landowners make informed decisions about timber harvest.
- Reduce the percentage of ash trees before EAB infestation through carefully-planned harvesting or tree planting
- Check out the DNR Forest Stewardship Program to receive technical advice and long-range management planning to keep your woodlands productive and in healthy condition.
In addition to the guidelines above, private forest managers are encouraged to consult Ash Management Guidelines for advice on how to manage ash in their forests and woodlands.
Homeowners with ash trees in or near EAB-infested areas should consider removing and replacing trees, or try to save ash using preventative insecticide treatments.
Insecticides are either injected directly into the trunk, sprayed onto the trunk, or poured into the soil around the base of the tree. All of these treatments must be repeated, according to instructions on the product label to be effective against EAB. When considering insecticide treatments, visit the Homeowner Guide to Insecticide Selection, Use, and Environmental Protection for more information, or consider contacting a ISA-certified arborist.
When considering ash tree removal and tree replacement options, hiring an ISA-certified arborist may be the best option. When you plant, be sure to choose the right tree for your area, and carefully follow sound planting practices.
What can I do to help?
The rapid spread of EAB is mostly due to human transport of infested ash firewood. EAB is a serious invasive tree pest, and consequently a quarantine has been placed in several counties to help prevent the spread of EAB to other areas in Minnesota. Firewood and other ash products are regulated by the Minnesota Department of Agriculture. It is unlawful to move:
- Ash logs and lumber
- Ash tree waste such as chips and mulch
- All hardwood (broadleaf deciduous trees) firewood
Detailed information about what is regulated is available at the EAB Quarantine and Regulatory Information website.