How to control various diseases and insect pests of Lagerstroemia indica?

1, soot disease often occurs on leaves and branches of plants, and the pathogen is mainly spread by aphids and scale insects. Therefore, pest control should be given priority to, and 40% omethoate EC 1500 times or 80% dichlorvos 1500 times can be sprayed.

2. Powdery mildew harms shoots and leaves. In severe cases, the shoots die and the plants can't bloom normally. 70% thiophanate-methyl wettable powder can be sprayed with 800 times solution for 3 ~ 5 times.

From March to September, moth larvae damage branches and leaves, and 90% trichlorfon 1000 times of liquid can be sprayed.