Emerald Ash Borer Treatment
ArborThrive specializes in emerald ash borer treatment near Brainerd and Saint Cloud, MN. Our trunk injection treatments with the insecticide emamectin benzoate are highly effective and must be repeated every other year to maintain protection. Contact our ISA Certified Arborist to discuss an emerald ash borer treatment plan for your ash trees.
When To Treat For Emerald Ash Borer
Treat healthy ash trees if emerald ash borer has been reported within 30 miles of your property. Treatments performed before an emerald ash borer infestation are far more effective than treatments on infested trees. Treatments can be applied throughout the growing season (May-September) to protect trees.
What To Expect After Emerald Ash Borer Treatment
Ash tree treatments with the chemical emamectin benzoate kill emerald ash borer larvae under the bark and adult beetles that feed on the leaves. Treatments must be repeated every other year to maintain protection.
Keep Your Trees Alive With ArborThrive!
Brainerd: 218-820-0705
St. Cloud: 320-200-1099
What is Emerald Ash Borer?
Emerald ash borer (EAB), Agrilus planipennis, is an invasive wood-boring beetle from Asia that has killed millions of ash trees since first being discovered in the United States in 2002. It was discovered in Minnesota in 2009 and has continued to spread across the state and over 30 other states in the U.S. as well as Canada.
Where is EAB in MN?
EAB continues to spread in MN each year. For up to date locations of confirmed EAB infestations near Brainerd and Saint Cloud, MN, please refer to the MN Department of Agriculture’s map. You can view that interactive map here.
How Does Emerald Ash Borer Kill Ash Trees?
The larvae (immature stage of EAB) feed underneath the bark of trees creating winding tunnels called galleries, which cuts off the tree’s transport of water and nutrients. This leads to initial thinning and dieback in the upper crown of the tree and within 3-4 years the tree dies.
How To Recognize Ash Borer Damage
Thinning Foliage And Dieback
Early ash borer infestations are quite difficult to notice, but after multiple years of infestation, you may see dieback and thinning foliage in the upper part of the tree.
Woodpecker Damage
Woodpecker damage may also be noticed, as woodpeckers feed on the EAB larvae beneath the bark. Rough holes or strips of bark missing from excavating woodpeckers are one of the first visible symptoms.
D-shaped Exit Holes
As the adult beetles emerge from the tree in spring, they create 1/8 inch, D-shaped exit holes.
Resources
National Industry Guidelines For EAB Treatments – This publication was created by the leading experts and researchers in the country on emerald ash borer. All other documents and experts refer to this when looking for industry approved scientific information related to emerald ash borer.
EAB Map of Minnesota – This is an interactive map that shows where emerald ash borer has been confirmed by the MN Department of Agriculture in Minnesota.
EAB Info – The MN Department of Agriculture’s information page regarding ash borer in Minnesota.