USDA Warns of New Gypsy Moth Case in Mexico’s Nuevo León

Web Editor

September 22, 2025

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Background on the Gypsy Moth Threat

The United States Department of Agriculture (USDA) has issued an urgent notification following the confirmation of a Gypsy Moth neotropical (NWS) case in Sabinas Hidalgo, Nuevo León, less than 113 kilometers from the US border.

This discovery poses a significant threat to US livestock and the poultry industry. The Gypsy Moth, native to Europe, is an invasive species that can defoliate trees and harm various crops. Its presence in Mexico so close to the US border raises concerns about potential spread and impact on American agriculture.

USDA’s Firm Stance and Binational Collaboration

The USDA has made it clear that they will protect the United States, even if Mexico does not fully cooperate. This situation emphasizes the need for close binational collaboration to contain the spread of this pest and safeguard animal health and regional economies.

The USDA urges US and Mexican livestock producers to strengthen biosecurity measures and epidemiological surveillance to prevent further dissemination of the Gypsy Moth.

Key Actions and Recommendations

  1. Immediate Response: Authorities on both sides of the border should act swiftly to contain and monitor the Gypsy Moth infestation.
  2. Enhanced Biosecurity: Producers should implement stricter measures to prevent the introduction and spread of pests, such as regular inspections of livestock facilities and equipment.
  3. Epidemiological Surveillance: Increased monitoring and reporting of pest activity are crucial to understanding the extent of the problem and planning effective control strategies.
  4. Binational Cooperation: US and Mexican agricultural agencies should collaborate closely to share information, resources, and best practices for managing the Gypsy Moth threat.

Key Questions and Answers

  • What is the Gypsy Moth? The Gypsy Moth (Lymantria dispar) is an invasive moth species native to Europe. Its caterpillars feed on the leaves of trees, causing significant defoliation and harming various crops.
  • Why is this a concern for the US? The recent discovery of Gypsy Moths in Nuevo León, Mexico, is alarming because of its proximity to the US border. If the moths establish themselves in the US, they could cause substantial damage to forests, orchards, and other agricultural resources.
  • What can be done to prevent further spread? Strengthening biosecurity measures, enhancing epidemiological surveillance, and fostering binational collaboration are essential steps to contain the Gypsy Moth threat.