Gypsy Moth Suppression Program

Alicia Wallace - Program Coordinator
Jeremy Lowell - Assistant Program Coordinator

Bay County Building
515 Center Avenue, Suite 503
Bay City, Michigan 48708-5941
Voice: (989) 895-4195

2020 Bay County Emerald Ash Borer (EAB) Treatment Injections 

Treatments to protect publicly owned Ash trees from EAB will be done by direct injection of an insecticide between June 15, 2020 and June 30, 2020.  EAB treatment timing is dependent on the leaf development of the ash trees that will be treated. The ash trees need to be actively transpiring or moving water through the tree to take up the insecticide. Treatment of each tree is estimated to take from 15 minutes up to two hours. The 2020 EAB Treatment Project will treat approximately 985 ash trees and will take up to three weeks to complete. These treatments will protect the trees from EAB for three (3) years.

Treatment Information 

  • Injectable Insecticide Common Name: Tree-age Active 
  • Ingredient: Emamectin Benzoate 
  • Method of Application: Direct tree injection through one way ports that do not allow the insecticide to leak out of the tree. 
  • Application Firm: Injection treatments will be done by Kinnucan Tree Experts & Landscape Company. 
  • Affected Trees: Specific areas included in the 2020 treatment project are located along streets and in parks in the cities of Auburn, Bay City, and Essexville and in parks in Hampton, Merritt, Portsmouth, and Williams Townships. 
  • Marking Trees for EAB Treatment:  Ash trees that are going to be treated in 2020 EAB Ash Tree Treatment Program have been marked with a green spray paint dot.
Maps for the 2020 EAB Treatment 
The green dots on the maps represents the Ash Trees that are scheduled for treatment in 2020.

2020 EAB Tree-age Information 

For further information or questions about the upcoming 2020 EAB Treatment, please contact Alicia Wallace, Bay County Gypsy Moth Suppression Program, 515 Center Ave. Suite 503, Bay City, Michigan 48708 at 989-895-4195 or via email at

Emerald Ash Borer

The Emerald Ash Borer (EAB) is an Asian beetle that moved into the south-east corner of Michigan some time in the early 1990's. It's larvae feed on the cambium or conductive tissue just under the bark of ash trees. They only feed on ash trees and will usually kill the infested tree within 1 to 5 years. Though the infestation was first discovered in 2002 in the Detroit area, this aggressive beetle is now found throughout the lower peninsula of Michigan and in 13 additional States and in two Canadian provinces. (To see the EAB locations map please click HERE.)

In 2004, voters in Bay County approved the renewal of the Gypsy Moth Millage with the inclusive language of "other invasive, non-native pests, such as the Emerald Ash Borer (EAB)". This will allow the Gypsy Moth Suppression program to address the problem of the EAB when it is found in Bay County. The EAB Plan of Action outlines the actions which will be undertaken by the Bay County Gypsy Moth Suppression Program with regard to the EAB.

In 2005, the Emerald Ash Borer was found in southern Bay County.

Emerald Ash Borer (EAB) Lifecycle

To find our more about the Lifecycle of the EAB and how if effects your trees, please watch the LIfecycle of the Emerald Ash Borer Video.

Emerald Ash Borer (EAB) Multi-State Location and Quarantine Map

The Federal Quarantine no longer prohibits the movement of ash wood products from Michigan to parts of Ohio, Indian, Illinois, and other areas in the "generally infested" areas of the country as long as the products do not leave the generally infested area.  To see where the Emerald Ash Borer (EAB) is, check out the EAB Multi-State Location Map and Michigan Department of Agriculture EAB Quarantine Map

Treatment of Emerald Ash Borer (EAB)

Present treatment technology is available to treat individual trees and homeowners are encouraged to use these treatments to protect their ash trees. However, the high cost of treating individual trees limits the actions of the Bay County Gypsy Moth Suppression Program. The EAB Plan of Action outlines the actions which will be undertaken by the Bay County Gypsy Moth Suppression Program with regard to the EAB.

How can I tell if I should treat my Ash Trees?

For more information to determine if your Ash Tree should be treated for Emerald Ash Borer, check out the Identification of Stages of EAB Decline & Whether Treatment is Warranted MSU website.

Emerald Ash Borer in Bay County

Emerald ash borer (EAB) have been found in ash trees throughout Bay County. If you have an ash tree that you would like to save, begin treatment as soon as possible. To find out what you can do, check out the Emerald Ash Borer: Homeowners Guide to Insecticide Selection and Use.

Local Landscape Companies and EAB Treatment

For a list of local landscape companies and their Emerald Ash Borer (EAB) treatments provided, please click HERE.

Ash Tree Identification

Not sure if your tree is an Ash? Check out the MSUE Ash Tree Identification Guide or check out MSUE/USDA Bulletin E-2942 on Ash Tree Identification for descriptions and details.

For more information about the EAB go to the following links:

Other Emerald Ash Borer (EAB) Links

Emerald Ash Borer Program Guidelines (36.2 kb)