The main diseases that harm Ligustrum lucidum are rust and brown spot.

Rust mainly harms leaves. Orange spots appeared on the leaves in the early stage, and brown spores appeared on the back of the leaves in the later stage.

Prevention and control methods: the cultivation medium should be disinfected in advance, environmental management should be strengthened, ventilation and light transmission should be maintained, and diseased leaves should be removed if necessary; At the initial stage of flower and tree diseases, spray 0.2 ~ 0.3 degree lime-sulfur mixture, or 500 times solution of 70% mancozeb wettable powder, or 70% thiophanate methyl 1.000 times solution, or 25% triadimefon 1.500 times solution.

Brown spot pathogen is a kind of fungus, which mainly attacks leaves, usually the lower leaves begin to get sick, and then gradually spread to the upper parts. At the beginning of the disease, the lesions were round or nearly round, with different sizes and a few irregularities; The focus is purple-black to black with light edge color. Then the color of the lesion deepened, showing black or dark black, which was obviously separated from the healthy part. In the later stage, the color of the lesion center becomes pale and small gray-black mildew spots appear. When the condition is serious, the diseased spots become one piece, the whole leaves turn yellow quickly and fall off early. Brown spot disease generally begins in early summer and is seriously harmful in autumn. It is easy to break out in hot and rainy seasons, especially in years or seasons with frequent rainstorms; Usually the lower leaves are more susceptible to infection than the upper leaves.

Prevention and control methods: early detection, timely removal of diseased branches and leaves, centralized incineration, and reduction of pathogen sources; Strengthening cultivation management, shaping and pruning to make plants ventilated and transparent; At the initial stage of the disease, 500 times of 50% carbendazim wettable powder, 65% zineb wettable powder 1000 times of 65% carbendazim wettable powder or 800 times of 75% chlorothalonil wettable powder can be sprayed.