In the early stage of growth, spray 2 to 3 times of 50% sulfur suspension 300 times, or sulfur powder, to prevent the occurrence of powdery mildew; choose 15% triadlanine WP 1 000 to 1 500 times, or 40% Fuxing Emulsion at the beginning of the disease. 5 000 to 6 000 times liquid, or 20% of myclobutanil 1500 to 2000 times spray, spray every 6 to 7 days, even spray 3 times. In order to avoid germ resistance, the drugs should be used interchangeably.