Oak Wilt

Susceptible Oaks
Oak Wilt is a very serious tree disease that is killing oak trees in Central Texas at epidemic proportions. It is an infectious disease caused by a fungus which invades and disables the water-conducting system in susceptible trees. 

The oaks that are particularly susceptible to Oak Wilt include:
  • Red Oaks
  • Spanish Oaks
  • Shumard Oaks
  • Blackjack Oaks

Live Oaks are also susceptible and happen to be the most numerous trees in our area. The Live Oaks tendency to grow from root sprouts and to have interconnecting root systems allows for quick spread of the disease amongst Live Oaks.
Oak Tree.jpg

Non-Susceptible Oaks

When planting trees consider planting Oaks that are not susceptible to Oak Wilt, including White Oaks such as:

  • Post Oaks
  • Bur Oaks
  • Chinkapin Oaks

These are resistant to the fungus and seldom die from the disease. Also, consider planting other Texas Hill Country Native trees from a list compiled by the Native Plant Society of Texas Boerne Chapter.


Managing Oak Wilt

The City of Fair Oaks Ranch is working diligently to educate the residents of the City to help prevent the spread of this disease. Oak Wilt can be managed in three basic ways: 

  • Prevention – Early detection and proper disposal of infected trees. Painting of all wounds on oaks trees as soon as they occur. Avoiding pruning trees between February and June. Proper storage of firewood to prevent fungal mat spread. Planting trees that are not susceptible.
  • Containment - Trenching 100 feet from infection area and severing of all interconnecting roots.
  • Fungicide Treatment - Fungicides used as a preventative treatment may show some success in the early stages of the disease.


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