Changes in the Occurrence Patterns of Rice Fungal Diseases Due to Climate Change

Abstract

Climate change has significantly influenced the occurrence and severity of fungal diseases affecting rice, a staple crop vital to global food security. Rising temperatures, shifting precipitation patterns, and increased atmospheric carbon dioxide levels have altered the epidemiology of major rice fungal pathogens, including rice blast caused by Magnaporthe oryzae, sheath blight caused by Rhizoctonia solani, brown spot caused by Cochliobolus miyabeanus, bakanae disease caused by Fusarium fujikuroi, and false smut caused by Ustilaginoidea virens. These climatic changes have expanded the geographic distribution of certain diseases, increased disease severity in specific regions, and led to the emergence of previously secondary pathogens as primary threats. Long term monitoring data from South Korea highlight shifts in disease prevalence and severity over the past decade, underscoring the need for adaptive disease management strategies. Integrated approaches including the development of resistant rice varieties, climate-informed agronomic practices, and predictive modeling are essential to mitigating the risks posed by fungal diseases under evolving climate conditions. Strengthening surveillance systems and fostering international collaboration will be crucial to safeguarding rice production against the combined threats of climate change and plant disease.