Cultivation techniques of small-grain Coffee

Disease control:

1. Coffee rust is the main disease of coffee, which is the most harmful. The injured plants, light ones reduce production and heavy ones die. 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:

(2) 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, the first time should be before the rainy season, according to the specific situation and the severity and degree of the disease, generally every 2~3 weeks, triadimefon has a preventive effect on coffee induced disease, and has a therapeutic effect in the early stage of the disease. 35~ 65g of 25% wettable powder or 150~ 300g of 5% wettable powder are sprayed with 30kg of water per mu.

Coffee anthrax 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.