DALLAS — In the serene community of Lake Highlands, the sight of grand oak trees has long been a source of pride and joy for residents like Sherry Koeninger.
The stately trees, which have flourished for decades, play a central role in the area's charm — a fact that initially drew Koeninger and her husband to their current home.
"When we turned onto the street, we were like ‘oh, my gosh. This is beautiful!’," Koeninger recounts.
However, lurking beneath the canopy of these magnificent trees: a silent and deadly threat poses a significant risk to their survival.
Oak wilt, a destructive fungal disease, has already claimed over a million oak trees across Texas, and the danger it poses to the Lake Highlands neighborhood cannot be overstated.
Master arborist Amy Langbein-Heath of Texas Tree Surgeons provides insight into the severity of the situation.
"It is a big deal in Texas, yes. Because oak trees are native to Texas, and we have such a monoculture here in DFW, it would be devastating if it started spreading more aggressively," Langbein-Heath told WFAA.
Oak wilt's impact on the ecosystem and the area's landscape would be profound, making prevention and early detection crucial.
Oak wilt operates by invading the vascular system of oak trees, interfering with their ability to transport water and nutrients. It spreads in two primary ways: above ground, where sap beetles transfer the fungus from infected to healthy trees via fresh pruning wounds; and below ground, as the fungus moves through interconnected root systems at a rate of 75 to 100 feet per year.
To combat this disease, experts recommend the use of propiconazole, a fungicide proven to prevent oak wilt. However, this treatment is costly, and it’s essential to consult with a reputable arborist like Amy, who can determine if it’s necessary. Laboratory confirmation is required for an accurate oak wilt diagnosis, but homeowners can watch for early signs, such as a thinning canopy or a distinctive pattern on the leaves.
Unfortunately, by the time these symptoms are evident, it may be too late to save the tree.
Koeninger, having witnessed the toll oak wilt took on her neighbors' trees, decided to be proactive in protecting her own.
"Who would not want to save this beautiful thing?" Koeninger said, emphasizing the value she places on her live oak.
As a precaution, arborists advise against pruning trees between Valentine’s Day and Independence Day — the period when sap beetles are most active and likely to spread oak wilt into open wounds.
The fight against oak wilt is not just about saving individual trees, but about preserving the character and natural beauty of communities like Lake Highlands. By staying vigilant and taking preventive measures, residents can help protect these leafy giants for future generations to enjoy.
If you suspect your tree might be affected by oak wilt or wish to learn more about prevention, contact your local arborist or visit the Texas Tree Surgeons website for further information.
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