U.S.-Mexico avocado pact trims fertilizer runoff, offering a model for future trade

In 2016 the United States opened its avocado market to Mexican growers who could satisfy demanding USDA production criteria, including certification, multiple inspections and pest-free guarantees. Facing the risk of lost export revenue, farmers adopted precise pest-tracking methods rather than blanket chemical sprays, which in turn made excess fertilizer use unnecessary. A study contrasting water quality in avocado-producing regions with similar non-avocado areas documented a ten-percent reduction in nitrogen concentrations downstream within a few years.

This decline translates into a modest but meaningful cut in fertilizer consumption, easing pressure on local waterways. While the avocado trade is unique—dominated by a single buyer and supported by a robust certification system—the episode illustrates how trade rules can be leveraged to improve environmental outcomes. The research also notes lingering challenges such as deforestation, water demand and links to criminal groups, underscoring that trade-driven gains are not universal.