Prevention and control of coffee rust is the main disease of coffee.

1. Coffee rust is the main disease of coffee, the most harmful, damaged plants, light yield, serious death. Coffee rust mainly affects leaves, but sometimes young fruits and shoots. After leaf infection, many small pale yellow spots appeared at first, and expanded like water stains, orange powdery spores were immediately found on the back of leaves, and light green halo circles were around the spots. Later, the spots gradually expanded or connected together to become irregular spots. The spots finally dried up and became dark brown, and the whole infected leaves fell off.

Control methods ① Choose rust resistant varieties for planting. In the introduction of strict quarantine work to prevent the spread of germs. (2) Strengthen tending management to improve plant disease resistance. 3. Remove pathogens. Nursery seedlings should be regularly inspected to remove sick leaves; coffee plants should be pruned to remove weak branches and sick leaves, especially before the end of the dry season, and once sick leaves are found, they should be immediately removed by human organization and combined with chemical control.④ Chemical control. 1%~5% Bordeaux mixture is sprayed for the first time before rainy season, depending on the specific situation and severity of the disease, generally every 2~3 weeks. Triadimefon has preventive effect on coffee induced disease and therapeutic effect in the early stage of disease. 35~ 65g of 25% wettable powder or 150~ 300g of 5% wettable powder are sprayed with 30kg of water per mu.

2. Coffee anthracnose occurs in almost all coffee growing areas. It mainly injures coffee leaves. After the initial infection, the upper and lower surfaces have pale brown spots with a diameter of about 3 cm. These spots are grayish white in the center and completely gray in the later stage, with concentric circles of black dots. Infections also often begin at the leaf margin. The disease can spread to branches and fruits, causing branches to dry; fruits infected with the disease have black sunken spots, hard flesh and close to the beans.