JUST IN: Screwworm Battle at the Border Threatens Livestock

WEST TEXAS (TXAN 24) — Texas is stepping up efforts to stop the spread of the New World screwworm—a dangerous parasite that lays flesh-eating larvae in warm-blooded animals, including livestock and wildlife. These pests haven’t been a major issue in Texas for years, but recent discoveries in Mexico raised red flags.

Officials are deploying Swormlure‑5, a synthetic bait that mimics natural scents to attract screwworm flies. It’s placed in traps that help monitor and reduce the population. This is part of a broader plan that includes:

• Sterile insect technique: Millions of sterile male flies are released to reduce breeding.

• Insecticide-treated cattle: To kill larvae early.

• $8.5M federal boost: The USDA is funding new facilities to support the sterile fly program.

The screwworm’s return could devastate ranching communities, particularly in South Texas. While the bait won’t harm pollinators like bees or butterflies, it’s considered a crucial step in keeping Texas livestock safe