Mexico: Extreme Heat and Pests Severely Impact National Potato Production

The Mexican potato sector is facing a highly challenging agricultural cycle. A combination of historic heatwaves, severe water scarcity, and rampant pest infestations has heavily impacted key potato-producing regions in the north of the country. According to agricultural authorities and local producers, these compounding environmental pressures have led to lower yields, smaller tuber sizes, and significant commercial difficulties.

Below is an in-depth breakdown of the current crisis, the affected regions, and the economic outlook for the sector.

Severe Climate Pressures in Northern Hubs

The northern states of Sinaloa and Sonora—which serve as critical engines for Mexico’s potato market—faced particularly hostile weather conditions during the recent growing cycle.

• The Impact of Extreme Heat: Unprecedented high temperatures disrupted the natural growth cycle of the potato crops. Instead of developing healthy, large tubers, plants suffered from thermal and water stress.
• Low Yields: According to Jorge Benjamín López Rosas, president of the Association of Potato Producers of Los Mochis, the average regional yield fell to just $23$ tons per hectare. This final output is significantly below the initial expectations and historical averages for the region.
• Commercial Size Deficit: The thermal stress stunted the physical development of the potatoes. This resulted in a critical shortage of “large potatoes” (papas grandes), which hold the highest commercial value in retail and fresh markets, drastically lowering the profit margins for local growers.

The Surge of Phytosanitary Threats

The high temperatures did not just stress the plants; they also created a breeding ground for destructive agricultural pests and fungal diseases. Farmers reported major infestations during the crucial final stages of crop development, right before harvest.

Among the primary threats identified were:

• Fungal Invasions: Extensive damage caused by Fusarium and other soil-borne fungi, which rot the root systems and ruin the aesthetic and structural quality of the tubers.
• Destructive Insects: Massive outbreaks of the potato tuber moth (palomillas) and other destructive insects that feed on the foliage and bore into the potatoes, rendering them unmarketable.

Market Disruptions and Rising Imports

The Confederación Nacional de Productores de Papa (CONPAPA) has raised alarms regarding the broader economic consequences of this harvest deficit. While a total national potato shortage is not anticipated, the market is feeling the squeeze in several ways:

1. Price Trajectory: The lower volume of domestic, high-quality potatoes is likely to cause price fluctuations. Fast-food chains, snack manufacturers, and processed food industries (such as potato chip makers) are expected to face higher procurement costs throughout $2026$.
2. Surge in US Imports: To meet the domestic supply gap, Mexico has seen a substantial increase in potato imports from the United States. However, Mexican producers have expressed concern over this trend, noting that imported potatoes can sometimes carry foreign pathogens or pests that could further threaten local soils.
3. Future Reductions in Acreage: Having suffered heavy financial losses this season, many farmers in Sinaloa—who sowed around $16,000$ hectares this cycle—are planning to reduce their cultivated areas for the upcoming season to minimize further financial risk.

Information Sources

This article was compiled using specialized agricultural news from the portal Argenpapa (argenpapa.com.ar, news items # $17333$ and # $17334$), featuring field reports and official statements from the Confederación Nacional de Productores de Papa (CONPAPA) and the Association of Potato Producers of Los Mochis (Sinaloa, Mexico).