With recent weather patterns creating an ideal nursery for pathogens, both the agricultural sector and local authorities are intensifying their field surveillance. They are guiding farmers through a synchronized suite of technical measures to proactively combat rice leaf blast and other emerging pests.

For the 2025-2026 Winter-Spring season, Điện Biên province has successfully sown nearly 9,390 hectares of rice, reaching 96.66% of the targeted plan. While the planting schedule largely adhered to the seasonal framework, adverse weather since the start of the season has weighed heavily on crop growth, significantly increasing the risk of leaf blast. Currently, the total area infected by various pests across the province stands at 977.2 hectares, with leaf blast being the primary culprit. While the damage is mostly categorized as light to moderate, the disease has been detected in almost every commune and ward.

The leaf blast outbreak is particularly visible in areas planted with popular varieties such as Séng Cù, Đài Thơm 8, and Bắc Thơm No.7. While the average infection rate lingers between 1% and 10%, certain localized pockets have seen infection rates soar above 50%. These high-risk areas are typically low-lying fields or plots where farmers have applied excessive nitrogen fertilizer or planted too densely, creating a perfect microclimate for the fungus to thrive. The pathogen, fueled by low temperatures, high humidity, and persistent fog, can cause “leaf burn” in patches if not treated immediately. This directly impairs the plant’s ability to photosynthesize, reduces the number of effective tillers, and can even lead to empty or discolored grains during the heading stage.

In the Mường Thanh ward, farmers like Lường Văn Sinh are already on high alert. Managing 2,000 square meters of Séng Cù rice, Sinh noted that although his crop is in the tillering stage, leaf blast has already begun appearing sporadically. He attributed the rapid onset to recent erratic weather and heavy fog. Upon discovering the lesions, he immediately increased the frequency of his field visits, applied recommended fungicides, and, crucially, reduced his nitrogen applications to starve the disease of the nutrients it needs to spread.

A similar story is unfolding in Thanh Nưa commune, which boasts the largest Winter-Spring rice area in the basin at over 1,114 hectares. Here, the primary varieties like J02 and Bắc Thơm No.7 are also at their most sensitive stage. Chu Văn Bách, Chairman of the Thanh Nưa People’s Committee, shared that the local government has directed all villages and extension officers to conduct rigorous field checks. By identifying and isolating infected patches early, they have been able to guide farmers in applying the right pesticides at the right time, effectively preventing a large-scale outbreak.

The provincial agricultural sector is doubling down on its “Four rights” principle for pesticide use: Right drug, right dose, right time, and right method. According to the Department of Agriculture and Environment, the current tillering stage is a decisive factor for the final yield. If rice blast is allowed to run rampant now, the number of effective panicles will drop significantly. Therefore, the top priority remains early detection and localized treatment.

Beyond rice leaf blast, authorities are also coordinating the management of other threats such as golden apple snails, rodents, brown spot disease, and bacterial leaf blight. Since the start of the season, a synchronized effort involving field sanitation, snail collection, and rodent trapping has resulted in the successful treatment of over 1,100 hectares of rice.

In the face of increasingly clear climate change and extreme weather events, plant protection must always stay one step ahead. Proactive disease management is not just a temporary fix for one season; it is a necessary stride toward sustainable agriculture.