Abstract:Based on the historical data of meteorology and disease during the wheat growing season, the zonation of wheat powdery mildew in China is conducted through the hierarchical clustering analysis. The results provide a scientific foundation for the regional prediction of wheat powdery mildew in practice and the synthetic prevention and treatment at different climatic conditions. Using the long term (1971~1998) meteorological data of 120 weather stations during the growing season when the powdery mildew occur...