US-Mexico reach agreement on screwworm The countries agree on pest control measures29 April 2025 29 April 2025 2 minute read 2 minute read By: By: Global Ag Media North AmericaThe United States and Mexico reached an agreement on the handling of a damaging pest called New World screwworm, Reuters reported, citing US Agriculture Secretary Brooke Rollins on Monday, after she threatened to limit cattle imports from south of the border. Maggots from screwworm flies burrow into the skin of living animals, causing serious and often fatal damage. Mexico has been working to respond to screwworm and is strengthening its efforts, President Claudia Sheinbaum said earlier on Monday. Washington blocked Mexican cattle from late November to February after the discovery of screwworm in Mexico. The US Department of Agriculture eradicated the pest from the United States in 1966 and wants to keep it out.