Emerald Ash Borer (EAB)
Emerald Ash Borer found on Bloomington’s doorstep
On November 7, 2014, EAB was confirmed in Bloomington infesting a tree along Columbus Avenue. A follow-up visual survey of the surrounding neighborhood was conducted with assistance from the Minnesota Department of Agriculture where branch samples from a tree in Columbus Playlot were found to be positive for EAB larva also.
The visual inspection of ash trees for signs of EAB will continue during the winter months and staff will work with the owners of suspected trees to have them taken down. Plans are being made to remove public ash trees within one mile of Columbus Playlot this winter.
Replacement tree planting in effected parks will take place during the spring and fall of 2015.
MN Department of Agriculture informational handouts
Don't let its size fool you... the Emerald Ash Borer represents an enormous threat.
About the Emerald Ash Borer
The Emerald Ash Borer (EAB) has been found in St. Paul and at Fort Snelling Golf Course. What does this mean for Bloomington? The City is working on putting in place a program to deal with this tree disease.
Quarantine in effect
The Minnesota Department of Agriculture (MDA) has implemented a quarantine in Hennepin and Ramsey counties that prohibits the movement of the following items out of Ramsey and Hennepin counties:
Information regarding disposal of quarantined ash tree waste can be found at the city's Garbage and yard waste disposal and recycling page.
The Minnesota Department of Agriculture indicates that the active period for the Emerald Ash Borer is May 1st through August 31st. Any pruning or removal of ash trees, branches or stumps should be avoided during this period as doing this may contribute to the spread of the Emerald Ash Borer disease. If ash tree work must be done for safety and hazardous condition reasons the material removed to include the outer 1 inch of the bark/ wood should be chipped on site or it should be transported in an enclosed vehicle to the nearest facility that can process the material. (only the outer 1 inch of bark/ wood harbors the EAB) A list of those approved disposal sites within the quarantine area are listed on the Minnesota Department of Agriculture web page. Pruning and removal of ash trees/ wood may be conducted from September 1st through April 30th.
Insecticide treatment information
Once EAB arrives in an area, it will remain a constant threat to ash trees for many years to come. If you choose to use an insecticide, it is likely that protective treatments will be needed for the rest of the tree's life. Optimal timing for most treatment methods is mid-April until the end of June.
City and State response
Photo credit: Howard Russell, Michigan State University, Bugwood.org.
Dave Hanson, Assistant Maintenance Superintendent/City Forester