On 13 August 2026, the Consejería de Desarrollo Rural in Cantabria reported that increased numbers of adult moths of the Spodoptera exigua, commonly known as “rosquilla verde”, had been recorded in the regional trap network in recent weeks. The authority sent an information sheet on identification, monitoring and approved control measures to district offices, agricultural cooperatives and plant protection product retailers. Farmers are being urged to maize crops monitor their crops closely. The administration does not currently expect significant damage in the region.
Documented facts and background: According to the authority, many maize fields in Cantabria are at advanced stages of development, when plants are less susceptible to feeding damage. Typical signs include irregular feeding holes in leaves, dark faecal traces, and egg masses or young larvae on the underside of leaves. According to the Sección de Producción y Sanidad Vegetal the larvae cause the economically significant damage. In Galicia significant local losses have already been reported in early-stage maize in 2026. Warmer weather can accelerate the pests’ development cycles and thereby favour population peaks.
Measures and recommendations: Priority is given to Integrated pest management. This includes regular field inspections, the use of pheromone traps to assess infestations and—only if damage thresholds are exceeded—targeted treatments with plant protection products registered by the Ministry of Agriculture while observing dosage, application conditions and safety intervals. In more advanced crops, the authority recommends early, localised applications to affected areas.
Assessment and implications: The notice is precautionary in nature in Cantabria. The aim is to identify local outbreaks early and respond precisely, avoiding widespread applications. Economic risks are currently considered limited. However, they could increase if trap numbers continue to rise or infestations occur during sensitive growth stages of maize. For affected farms, the Sección de Producción y Sanidad Vegetal remains the main point of contact for guidance on monitoring, damage thresholds and approved products.
Assessment of the statements: The increase in numbers caught in the trap network has been recorded. The view that no major damage is currently expected in Cantabria is an assessment by the Consejería de Desarrollo Rural as of 13 August 2026. Possible future damage is a forecast whose outcome depends on weather and population development.
Editor: Celestina Fuentes (Article created with AI assistance).