How to prevent and cure the leaf spot of Cymbidium

The symptoms of the disease mainly infected the leaves, and at the initial stage of the disease, the leaves had small brown spots, which gradually expanded into large disease spots with irregular shape from yellowish brown to grayish brown. The part of the disease is slightly sunken and the edge is slightly raised. In the later stage, the disease spot is dry and there are small black spots on it.

The pathogen and the regularity of the disease is a kind of true bacteria. When too much nitrogen fertilizer and relatively less phosphorus and potassium fertilizer are applied in cultivation, the disease is easy to occur. Leaf spot disease is easy to occur under the condition of high temperature and drying, or when the insect is seriously damaged.

Prevention and cure method

1. Remove diseased leaves and disabled bodies. Reduce the source of infection.

2. Control shell insects, avoid insect pests and reduce infection.

3. In the early stage of the disease, 50% carbendazim 1000-fold solution, 70% topiramine wettable powder 1000-fold solution and 50% Dysenamine 1000-fold solution were sprayed for prevention and treatment.