From high blood pressure and Type II diabetes to emphysema and elevated cholesterol, humans have to deal with many diseases that doctors call “silent killers.” You might be surprised to learn that common tree species face similar threats. While your white or red oaks won’t come down with diabetes anytime soon, they may face a “silent killer” of their own: Texas oak wilt. Learn more about how to prevent the spread of this tree-killing disease.
What Is Texas Oak Wilt?
Texas oak wilt is a fungal infection that resides in the vascular systems of healthy trees. Over time, it kills most if not all of the trees that it infects. However, its precise progression depends on the species of the infected tree and certain environmental conditions.
Recognizing the Signs
The fungus that causes Texas oak wilt can spend months in a dormant or semi-dormant state within the vascular systems of affected oaks. In red oaks, the first outward sign of infection is typically a “bronzing” of the leaves on one limb. In white oaks and live oaks, gradual browning is more common. In either case, leaves eventually drop in clusters. Red oaks are most susceptible to Texas oak wilt and may die within a few weeks of the disease’s onset. White oaks tend to be “carriers” of the disease and may last through an entire season. Unfortunately, this means that they’re potent vectors for its spread.
Preventing Its Spread
Texas oak wilt is spread by fungal spores that originate in “mats” that rest on the trunks of dead or dying trees. Insects help spread the spores by feeding on the sap that leaks out of these trees and mixes with the mats. When insects reach a new tree, they can introduce spores into its tissues by coming into contact with open wounds or weak spots in its bark.
To prevent the spread of Texas oak wilt, infected trees must be destroyed as quickly as possible. Debris from destroyed trees, including stumps, must be removed from the site or burned. Soil-borne spread can be prevented by surrounding the affected areas with deep ditches that reach at least three feet across. For serious infestations, fungicide may be required.
Don’t Deal with Texas Oak Wilt on Your Own
While Texas oak wilt isn’t the end of the world, it’s a serious problem that requires a firm response. If you wish to prevent the disease’s spread to unaffected trees on your property, you’ll need to follow the advice that we’ve outlined in this piece. If you feel overwhelmed and would like some help with this undertaking, contact our San Antonio landscaping and tree service professionals or schedule a free estimate through our website.