A pest thought vanquished decades ago is forcing Texas cattlemen back to the front lines. The New World screwworm, which had been eradicated from the United States, is staging a comeback that has ranchers scrambling to protect their herds with modern surveillance and vigilant monitoring.
Faced with the threat, ranchers are turning to drones and intensified herd inspections as their first line of defense. The screwworm, a parasitic fly larva that burrows into open wounds on livestock, can spread rapidly through a herd if left unchecked. The renewed danger has upended ranching practices and forced operators to adopt technologies they once thought unnecessary.
The USDA is responding by ramping up production of sterile flies, a biological control method that proved effective in the original eradication effort. By releasing sterilized male screwworms into the wild, the program disrupts breeding cycles and keeps wild populations in check.
The convergence of old ranching wisdom and new tools reflects the urgency of the situation. Drone surveillance allows cattlemen to spot infestations quickly across sprawling properties, while increased ground inspections catch problems before they spiral. What was once a solved problem is now forcing the industry to invest in prevention and detection systems that were unthinkable just months ago.
The resurgence underscores how quickly a controlled threat can become urgent again when vigilance lapses. For ranchers betting their operations on keeping screwworms at bay, the return to active management is both costly and necessary.
Author James Rodriguez: "The fact that ranchers are dusting off drone technology to fight a fly we thought we'd buried decades ago shows how unpredictable nature can be when we let our guard down."
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