How to control Lagerstroemia indica powdery mildew?

Control measures for powdery mildew of Lagerstroemia indica: (1) Horticultural management: moderate pruning in winter and early spring, cutting off diseased branches, increasing ventilation and light transmission, removing residual branches and leaves, and reducing bacterial sources.

(2) Chemical control: Lagerstroemia indica should be sprayed in time at the germination stage in early spring, and 7000 times of 40% Fuxing (flusilazole) emulsifiable solution, 400 times of 45% crystal sulfur mixture, 20% triadimefon 1500 times of solution or 12.5% diniconazole wettable powder or 30% Teflon emulsifiable solution can be used. Once every 10 ~ 15 days, with continuous control for 2 ~ 3 times.