Confirmed Case of Oak Wilt Found in Arlington

Published on July 22, 2026

By Arlington Parks, Recreation & Culture

One post oak tree, among other suspected trees, at a property in west Arlington (76017) has tested positive for oak wilt in the Texas A&M Plant Disease Diagnostic Lab. Oak wilt is a serious disease caused by a fungus that blocks the movement of water in oak trees.

The oak wilt disease can spread from tree to tree by moving firewood, through underground roots, and by sap-feeding beetles on open tree wounds. The trees most commonly affected by oak wilt include the red oak tree group, which is the most severely affected, as well as live oak. The white oak tree group, including burr, chinkapin, and post oaks, is less commonly affected but still susceptible to infection.

Several signs can indicate oak wilt, including the sudden decline of a tree, yellowing of leaf veins, increased defoliation, sporadic canopy limb death, and premature fall color in red oaks. Trees decline for many different reasons, and oak wilt is rare in the Arlington area. A lab test is needed to accurately diagnose oak wilt.

You can help reduce the spread of oak wilt by observing your own trees and acting early if you notice any of the signs and symptoms. Avoid moving firewood, as this can introduce the disease and insects carrying oak wilt to new trees. Prune oaks during fall and winter and immediately seal open pruning cuts and wounds with paint. If you suspect oak wilt, contact an ISA-certified arborist for evaluation.

You can locate a certified arborist through the Trees Are Good arborist directory.