Is Lagerstroemia indica easy to get diseases and insect pests?

Lagerstroemia speciosa and Lagerstroemia speciosa are characterized by high resistance to aphids. Almost no aphid disease occurs in the whole growth process, which saves labor and time, and is economical and environmentally friendly. Lagerstroemia indica and Lagerstroemia indica have fewer other pests and diseases. Other diseases mainly include powdery mildew, which produces a white powdery mildew layer on the back of leaves when it is harmful, and causes leaves to fall off when it is serious. It can be controlled by spraying 800 times triadimefon or 0.3-0.5 baumol of sulfur mixture. Related knowledge can be searched for green farmers in Jiangxi.