Control of Coffee Rust and Coffee anthracnose by Coffee Diseases

1. Coffee rust is the main disease of coffee, the most harmful, the damaged plants, light reduced yield, serious death. Coffee rust is mainly harmful to leaves and sometimes to young fruits and twigs. After the leaves were susceptible, many light yellow spots appeared at first, and expanded in the shape of water stains, and then there was a pile of orange-yellow powdery spores on the back of the leaves, and there was a light green halo around the disease spots. In the later stage, the disease spots gradually expanded or linked together, becoming irregular disease spots, and the disease spots finally withered, showing dark brown, and the whole susceptible leaves fell off.

① was planted with rust-resistant varieties. Quarantine work should be done strictly during introduction to prevent the spread of germs. ② strengthens tending management and improves plant disease resistance. The pathogen was cleared by ③. The seedlings in the nursery should be inspected frequently to remove the diseased leaves; the plants in the coffee garden should be pruned to remove the weak branches and diseased leaves, especially before the end of the dry season, and all the diseased leaves should be removed immediately as soon as they are found. and combined with chemical control. Chemical control of ④. Using 1% to 5% Bordeaux liquid spray, the first time should be before the rainy season, according to the specific situation and the severity and severity of the disease, generally every 2 to 3 weeks spray, rust Ning has a preventive effect on coffee disease, there is a therapeutic effect in the early stage of the disease. Use 25% wettable powder 35g / mu or 5% WP 150g / mu, spray 30kg of water.

two。 Coffee anthracnose occurs in almost all coffee-growing areas. It is mainly harmful to coffee leaves. After the initial infection of the leaves, there are light brown spots on the upper and lower surfaces, with a diameter of about 3 cm. The centers of these lesions are grayish white and turn completely gray in the later stage, with black dots arranged in concentric circles. Infection often begins at the edge of the leaf. The disease can spread to branches and fruits, causing branches to dry up; after the fruit is infected, there are sunken disease spots that turn black, and the flesh hardens and clings to the beans.