New World Screwworms Approach Texas-Mexico Border

Livestock producers urged to take preparedness steps as threat looms

Mar. 28, 2026 at 6:51am

Got story updates? Submit your updates here. ›

Livestock producers in Texas need to start planning and preparing as the dangerous New World screwworm pest approaches the state's border with Mexico, according to experts from the Texas A&M AgriLife Extension Service.

Why it matters

The New World screwworm is a major threat to livestock health and can cause significant economic damage if it spreads into the U.S. from Mexico. Producers need to be proactive to protect their herds.

The details

AgriLife Extension livestock specialists Ron Gill and Karl Harborth say producers should focus on three key areas: planning, preparation, and closely monitoring the situation and their livestock. This includes reviewing biosecurity protocols, stocking up on necessary treatments, and staying vigilant for any signs of the screwworm infestation.

  • The New World screwworm is currently approaching the Texas-Mexico border.

The players

Ron Gill

A professor in the Department of Animal Science at Texas A&M AgriLife Extension Service.

Karl Harborth

An assistant professor in the Department of Animal Science at Texas A&M AgriLife Extension Service.

Got photos? Submit your photos here. ›

What they’re saying

“Necessary action now breaks down to three areas: plan, prepare and monitor the situation and livestock.”

— Ron Gill, Professor, Department of Animal Science

“Producers need to be proactive to protect their herds.”

— Karl Harborth, Assistant Professor, Department of Animal Science

The takeaway

With the New World screwworm approaching the Texas border, livestock producers must act quickly to review their biosecurity protocols, stock up on necessary treatments, and closely monitor their herds to prevent a potentially devastating outbreak.