Oak Wilt Confirmed in West Arlington: What Homeowners Should Do Next

The City of Arlington reported on July 22, 2026, that a post oak at a west Arlington property tested positive for oak wilt at the Texas A&M Plant Disease Diagnostic Laboratory.

The finding is important for nearby homeowners, but it does not establish that oak wilt is widespread across Arlington or all of Tarrant County. Local reporting placed the surrounding neighborhood in ZIP code 76016, but that does not mean every property in the ZIP code is affected.

What is confirmed

At this point, the publicly confirmed finding is one post oak at the reported property. Other declining or suspected trees should not be treated as positive unless they are professionally evaluated and, when appropriate, tested.

Oak wilt is a fungal disease that can kill susceptible oak trees. Texas A&M Forest Service guidance says all oak species are susceptible, while red oaks are especially vulnerable and can help spread the fungus through connected root systems. Live oaks may also be connected underground, allowing the disease to move from one tree to another through shared roots.

How oak wilt spreads

The disease can move above ground when sap-feeding beetles visit fresh wounds on oak trees and carry fungal spores from an infected tree to another. That makes unnecessary cutting or pruning a concern during the higher-risk period from February through June.

Oak wilt can also spread below ground through connected roots, particularly among live oaks. Infected firewood is another concern because the fungus can survive in wood from diseased trees. Homeowners should avoid moving questionable oak firewood to another property.

Symptoms are not enough for a diagnosis

Leaf discoloration, sudden leaf loss, branch decline and other forms of canopy stress can have several causes. Drought, insects, construction damage and other tree diseases may produce similar signs.

For that reason, homeowners should not diagnose oak wilt from photographs or symptoms alone. Texas A&M guidance recommends accurate diagnosis and professional evaluation before a declining oak is removed, treated or transported as firewood.

What Arlington homeowners should do now

Avoid unnecessary pruning or wounding of oak trees, especially during the February-through-June period.
Paint fresh oak wounds immediately with tree-wound paint or an appropriate latex paint.
Do not transport potentially infected oak firewood.
Document symptoms and seek advice from a qualified arborist or other knowledgeable professional before removing or treating a tree.

These steps are prevention guidance, not a citywide pruning order or quarantine. Routine tree maintenance does not automatically spread oak wilt, but fresh wounds can create opportunities for transmission under the right conditions.

What to watch next

Additional testing, professional assessments or updated guidance from Arlington and Texas A&M Forest Service could clarify whether the confirmed property is isolated or part of a broader local pattern. Until then, the practical response is caution: protect fresh wounds, avoid moving questionable firewood and get a reliable diagnosis before making costly decisions about an oak tree.

Sources

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