Emerald Ash Borer
Emerald Ash Borer (EAB) is a nonnative invasive insect that infests ash trees. Many states in teh nation have been negatively impacted by the infestation of EAB. Currently, EAB Quarantine has been placed on 11 counties in Minnesota including Dakota, Scott, Ramsey, Hennepin, Houston, Winona, Anoka, Chisago, Filmore, and Olmsed Counties. The City of Owatonna has been working to prepare and manage for the arrival of EAB. All ash logs, lumber, waste, chips, mulch, and hardwood firewood within the quarantined area is considered regulated articles by the Minnesota Department of Agriculture (MDA) and are subject to regulatory conditions.
Minnesota is highly susceptible to the destruction cuased by EAB. The state has approximately one billion ash trees, the most any state in the nation. According to the most recent survey (1997) conducted by the Public Works Department, the City contains appoximately 4,553 boulevard trees. According to a DNR Community Tree Survey conducted in 2010, Ash trees represent 21.1% of trees, within one chain of the boulevard. The estimated number of Ash trees is between 900 and 1,000. Steele County has not yet been placed under quarantine.
The biggest risk of spreading EAB comes from people unknowlingly moving firewood or other ash products harboring larvae. Follow these easy steps to keep EAB from spreading:
- Don't transport firewood. Buy firewood locally from approved vendors, and burn it where you buy it.
- Be aware of the quarantine restrictions. If you live in a quarantined county, be aware of the restrictions on movement of products such as trees, woodchops, and firewood.
- Watch your ash trees for infestation. If you think your ash tree is infested go to www.mda.state.mn.us/eab and use resources available to identify and report.
To report a possible EAB infestation, contact the Arrest the Pest Hotline at firstname.lastname@example.org or (888) 545 - 6684
The implementation of an Emerald Ash Borer Management Plan will assist the City in taking a proactive approach to controlling the spread of EAB Infestation. This plan helps to spread the costs associated with the outbreak of EAB over a number of years. The widespread loss of every Ash tree in Owatonna will have a devestating effect on home values, quality of life, and the environment. The City's goal is to buffer that impact in advance by implementing the most current EAB preparedness activities.
EAB Management Program
- Internal and External Communication
- Public Education and Outreach
- Treatment and Control
- Wood Utilization and Disposal
- Private Removal and Replacement
- Public Removal and Replacement
Where is EAB currently?
The Department of Agriculture has created an up to date mapping tool to view quarantine and EAB report information. Minnesota Infestation Map
Ash Tree and EAB Identification
Identifying Ash Trees - University of Minnesota Extension
Do I Have Emerald Ash Borer? - University of Minnesota Extension
EAB Activity Periods
The identification of the high and low activity periods helps to reduce the spread of EAB. If a tree is left alone during the High Activity Period, then EAB has a place to lay eggs and reside. Because the adults will not emerge for one year, if the tree is cut down during the Low Activity Period, the eggs and adults will not have oppurtunity to survive and spread.
High Activity: May 1st - September 30th
- Avoid removal of ash branches, stumpes or trees. This is due to flight patterns of the insects, high risk of spreading.
- If removal is required:
- Prune and remove ash trees if absolutely necessary
- Chip at minimum the outer 1" of bark and wood on-site and transport to nearest ash tree waste disposal site where they will quickly process the material
- Or, transport at least outer 1" of bark and wood in an enclosed vehicle to the nearest ash tree wste disposal site that can quickly process the material
Low Activity: October 1st - April 30th
- Prune and remove ash trees as needed
- Transport at minimum 1" of bark and wood in and enclosed vehicle to the nearest ash tree disposal site where it will be taken care of before May 1st