Emerald Ash Borer / Insects

Emerald Ash Borer

To date, EAB has not been confirmed in Chanhassen or Carver County.

Spring Forestry Library Talk - The Bees and The Trees

Homeowner Options for Emerald Ash Borer

Emerald Ash Borer (EAB) is a small, introduced insect that kills all types of ash trees. It has devastated communities in the eastern United States and has been found in MN as close as Prior Lake and Plymouth. Without treatment, all ash will die once infested with EAB, but not all ash merit treatment. How do you know what to do as a homeowner? You can start by learning how to identify ash trees in your yard, what your options are to protect your trees from EAB or how to make the decision to remove them. The link above accesses a power point presentation from April 2016 given by the City of Chanhassen, Univ. of MN and Carver Scott Master Gardeners. You can also learn about the latest non-biased EAB information, provided by University researchers as well as state and national forestry staff, at the website.

There’s an opportunity to help the U of MN by volunteering to be a Wasp Watcher during the summer. Wasp Watchers is a citizen science project that engages volunteers in the biosurveillance of Emerald Ash Borer (EAB). Cerceris fumipennis is a ground-dwelling wasp that serves as a survey tool for early detection of EAB. This native, harmless wasp hunts wood-boring beetles like EAB and volunteers can monitor wasp colonies for the presence of EAB.

EAB History in the metro area
In January 2013, Emerald Ash Borer (EAB) was confirmed in Lakewood Cemetery near Lake Harriet, approximately 13 miles from Chanhassen city limits as the crow flies. In 2015, EAB was confirmed in Plymouth and Prior Lake. Treatment is recommended by the Minnesota Department of Agriculture (MDA) within a 15-mile radius of a known infestation. Treatment of valuable ash can be started this spring. Click on the Quick Links for Emerald Ash Borer Information to see treatment options for homeowners.

At this time, EAB has been confirmed in the following Minnesota counties: Hennepin, Ramsey, Dakota, Anoka, Olmstead, Houston, Filmore and Winona. These counties are under quarantine and have restrictions and regulations pertaining to the transportation of ash wood or trees over county lines. No ash, such as live trees, logs, firewood, brush or chips, may be moved outside of the quarantine counties without a Minnesota Dept. of Agriculture inspection certificate. Within these counties, chemical treatments to protect valuable ash trees have been recommended.

What can homeowners do?

  • Don't move ash wood in Minnesota, including firewood and cut trees. Firewood certified by the MDA is ok to use anywhere.
  • Become familiar with the symptoms of EAB. Use the Quick Links on the right to find more information.
  • If you suspect your trees may have Emerald Ash Borer, contact Environmental Resource Specialist Jill Sinclair.
  • Decide on treatment options for the ash trees in your yard. Options include preventative chemical treatment or removal.

Japanese Beetles

By now you’ve seen your fair share of these voracious bugs on your trees, shrubs, flowers and vegetable plants. The adult beetles doing the feeding are out only for a couple of months, anytime between June and mid-August. The insect spends 10 months of the year underground in turf and for most of that time they’re inactive.
Japanese Beetle_thumb.jpg
The grubs feed on grass roots in early spring and late fall. You may see lawn damage if populations become high. Unfortunately, there are no quick fixes to get rid of them. Monitoring your plants and manually removing the beetles and dropping them in soapy water is effective. Chemicals can also be effective if used at the right time and according to directions. The University of MN Extension Service has compiled a thorough bulletin on the topic. You can access it HERE.

Plants that attract beetles
Plants seldom damaged
American chestnut
American elm
American linden
American mountain ash
black cherry
flowering crabapple
horse chestnut
Norway Maple
American elder
black oak
box elder
common lilac
green ash
red maple
red oak
scarlet oak
silver maple
white ash
white oak
white poplar