U.S. Suspends Mexican Cattle, Horse and Bison Imports Over Screwworm Pest

Due to the northward spread of New World Screwworm, a month-by-month suspension is effective immediately and will continue until a significant window of containment is achieved.

Jeronimo–Santa Teresa crossing handles cattle en route to U.S.
Cattle held in a corral before being exported to the U.S. through the Jeronimo-Santa Teresa border crossing.
(Jose Luis Gonzalez/Reuters)

U.S. Agriculture Secretary Brooke Rollins on Sunday said she is suspending imports of live cattle, horses and bison through the southern U.S. border over the damaging pest New World screwworm, a measure that immediately drew opposition from Mexico.

“I am announcing the suspension of live cattle, horse and bison imports through U.S. southern border ports of entry effective immediately,” Rollins said. “The last time this devastating pest invaded America, it took 30 years for our cattle industry to recover. This cannot happen again.”

Her Mexican counterpart, Julio Berdegue, swiftly rebuked the action, but said he hoped the two countries could soon come to an agreement over the pest, known as NWS.

“We don’t agree with this measure,” he said in a post on social media, adding that it would be in place for 15 days.

The U.S. agriculture agency in a statement on Sunday said the suspension would be in effect on a “month-by-month basis.”

The U.S. and Mexico last month reached an agreement on the handling of the damaging pest, which can infest livestock and wildlife and carry maggots that burrow into the skin of living animals, causing serious and often fatal damage.

The U.S. agriculture agency in a statement said the efforts so far were not sufficient, and acknowledged “an economic impact” on both countries due to the suspension.

“There has been unacceptable northward advancement of NWS and additional action must be taken to slow the northern progression of this deadly parasitic fly,” USDA said.

It said the pest had been detected in Oaxaca and Veracruz, about 700 miles (1,127 km) from the U.S. border.

Reporting by Joey Roulette in Washington and Lizbeth Diaz in Mexico City; Editing by Bill Berkrot

Read more: Mexico Takes Additional Measures to Help Fight New World Screwworm

USDA Threatens To Halt Imports If Mexico Doesn’t Step Up New World Screwworm Control

AgWeb-Logo crop
Related Stories
Tapped by Secretary Rollins, Kip Tom is building a faster, satellite-driven replacement for NASS’s aging survey system, one he says could turn monthly reports into biweekly ones by year’s end for multiple crops.
A New York farmer’s viral videos exposing pressure tactics by solar developers caught the attention of USDA’s new Special Envoy for American Landowners, John Rich, turning a local fight into a national one.
Brady Huck with Empower Ag Trading says the grain complex removed war and weather premium, while cattle ended sharply lower in reaction to the resumption of partial cattle trade with Mexico.
Read Next
Your front-row seat to the 2026 Crop Tour! Watch live and on-demand only on Farm Journal TV.
Get News Daily
Get Market Alerts
Get News & Markets App