Emerald Ash Borer / Insects

Emerald Ash Borer


To date, EAB has not been confirmed in Chanhassen or Carver County.  However, in May 2017 EAB was found near Bryant Lake in Eden Prairie.

Spring Forestry Library Talk - The Bees and The Trees

Homeowner Options for Emerald Ash Borer

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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 Eden Prairie, 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 emeraldashborer.info.

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. In May 2017, The MN Dept. of Agriculture confirmed EAB infested trees in Eden Prairie near Bryant 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. The city has contracted with Rainbow Tree Care to provide treatment of public ash trees.  As a part of the contract, Rainbow is offering wholesale discounts on treatments of private ash trees for Chanhassen residents.  Click on the Quick Links for Emerald Ash Borer Information to see treatment options for homeowners as well as a link to Rainbow Tree Care.

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.
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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
apple
birch
black cherry
cherry
flowering crabapple
grapes
hollyhock
horse chestnut
Norway Maple
plum
roses
walnut
American elder
arborvitae
black oak
box elder
common lilac
euonymus
fir
green ash
hemlock
holly
juniper
pine
red maple
red oak
rhododendron
scarlet oak
silver maple
spruce
white ash
white oak
white poplar
yew