Disease control methods for Cattleya

Disease control methods for Cattleya

Leaf spot

One of the most common diseases. In the early stage of infection, small round black spots appear at the tip of the leaves, surrounded by water-like yellow circles, which then grow larger to form oval spots. Excessive humidity can cause leaf rot.

Prevention and control methods: increase ventilation, lower temperature, cut off diseased leaves, and spray pesticides.

Soft Rot

Bacterial diseases are easily contagious and spread. The new shoots turn from brown to black and rot rapidly. The leaves have dark green spots and then rot. This is a devastating disease and is difficult to treat.

Prevention and control methods: Cut off the diseased buds and spray 500 times diluted 50 % carbendazim powder.

Leaf blight

It occurs at the top of the leaves, and the leaves turn from brown to black as the spots expand.

Prevention and control methods: Remove diseased leaves in time, ventilate, reduce humidity, and spray with 1500 times diluted 50 % carbendazim powder.

Blossom rot

The temperature changes greatly during flowering, and the incidence rate is high when the temperature is low and the humidity is high. The gray-brown spots gradually expand, and this disease only grows on flowers.

Prevention and control methods: When the temperature drops suddenly, the indoor humidity should be reduced as soon as possible to prevent the spread of blossom rot.

Rust

Common diseases. Occurs under low temperature and high humidity conditions. Affect the normal growth of orchid plants.

Prevention and control methods: Increase ventilation, reduce humidity, and avoid watering.

Gangrene

Also called necrosis. When the disease occurs, ring-shaped lesions appear. It is difficult to cure and can only be removed and burned in time.

Prevention and control methods: Regularly spray 1000 times diluted 80% DDT emulsion to eliminate aphids.