Emerald Ash Borer continues to ravage the state of Minnesota. With an estimated 1 billion ash trees, Minnesota is the most densely ash tree-populated state. Now that EAB has arrived and is attacking trees in and around Stearns County, you’ll have to decide what to do if you have an Emerald Ash Borer infested tree on your own property.
Before you can decide what to do, you’ll need to observe the tree. When you first notice the infestation – whether by seeing an increased presence of woodpeckers, finding tunnels bored underneath the bark, or finding chunks of the tree not producing leaves anymore – you’ll need to evaluate how far along the EAB infestation is.
You can generally find out how far along the Emerald Ash Borer infestation is by looking at the tree canopy. If the canopy is still full, that’s great news! If the canopy has lost less than 30% of its foliage, you may still have time to treat the infestation. If the canopy has lost more than 30%, it is probably too late to treat, and you’ll need to remove the tree before it dries out and falls.
Trees infested with Emerald Ash Borer dry out faster, causing a more dangerous environment than trees that die naturally.
Treat With Insecticide
The fastest and most-effective method in Central Minnesota for treating an Emerald Ash Borer infested tree is to use a micro-infusion of insecticide.
At Valley Green Companies, we will come to your home and use a high-pressure tee needle to directly infuse an insecticide inside of a living ash tree, under the bark. This allows the tree’s natural processes to carry the insecticide with water up the trunk, into the branches and canopy.
This spreads the insecticide evenly and quickly throughout the tree and allows for control of larvae under the bark and adults who feast on the leaves within 1-2 weeks.
Micro-infusion needs to be applied every other year to protect your investment. Many other treatments must be applied annually.
Wait & Remove
When a tree has lost 30% or more of its canopy from Emerald Ash Borer activity, removal becomes the best option as treatment effectiveness is basically zero.
In this case, it’s best to hire a professional, insured, tree removal company, licensed in your jurisdiction, to safely take down the infected ash tree. Because the wood is infested with EAB, it needs to be properly disposed of. The wood can still be used for lumber or firewood on your personal property, but should not be transported except to a disposal site.
Transportation can be handled by your tree removal company, or you can move it yourself. If the wood can’t be transported immediately, it should be placed in a sealed container to prevent Emerald Ash Borer from escaping and infecting other nearby trees.