06/01/2025
Did you know that improperly trimming oak trees after storm damage could lead to the spread of a deadly tree disease?
Over the last week or so I see homeowners and even tree care companies removing damaged limbs after the recent storms without taking proper precautions. Oak wilt is a serious fungal infection that can devastate oak trees.
Trimming during warm weather exposes fresh wounds that attract beetles carrying the oak wilt fungus. These tiny insects (picnic beetles) are drawn to sap from the wounds and can spread the disease quickly between trees. They can be on a fresh wound within minutes! They may or may not have the fungus on their dirty little feet and if they do, it will kill that tree and then all other oak trees within a 100 ft radius or more through root grafts. Oaks use their interconnected roots to “talk” to each other and to share nutrients. The Oak Wilt fungus takes advantage of these grafts and grows into other trees and then continues to spread underground like spokes of a wheel. An entire forest can die.
- **Seal pruning cuts immediately**: Use tree wound paint or latex paint to cover any fresh cuts and protect the tree from infection. “Saw in one hand; paint in the other!”
- **Hire a certified arborist**: Professional tree care ensures proper techniques are used to safeguard your trees. And a note to anyone who trims oaks for hire without proper prevention techniques – you are liable for that tree and the neighboring trees that die.
Symptoms will show up in July and August. Leaves on the tree, or portions of it, will wilt. If that happens, get confirmation of the disease through a lab and get the advice of an Oak Wilt Qualified Arborist for the next steps.