Sophora japonica disease prevention and control methods

Sophora japonica leaf scorch

Symptom Analysis

Scorch leaf disease first affects leaves, causing the edges of the leaves to turn yellow. If the disease is severe, it may also cause the flowers to fall off. There are two main causes of Sophora japonica leaf scorch. One is caused by bacteria, which will cause brown spots on the edges of the leaves, the leaf color will fade, and finally all will wither. Under the influence of the bacteria, the leaves gradually infect the trunk, and the gradual spread will affect the growth of the entire plant.

Another reason is that the plant lacks calcium. Calcium is one of the elements that cannot be reused in the plant body. When it forms calcium salts and precipitates, the plant's calcium deficiency will become obvious and local necrosis will occur.

Prevention and treatment methods

Ensure that the maintenance temperature is appropriate and avoid excessive temperature. Control the humidity and avoid excessive humidity.

Protect the growth of the root system and avoid damaging the root system during repotting and soil turning.

Take precautions and spray disinfectants once a month, especially when the indoor temperature is hot in summer. When the disease occurs, spray pesticides to prevent and treat bacterial diseases in time and supplement calcium in time.

Sophora japonica bark rot

Symptom Analysis

This is a rare disease in home flower cultivation, but it is common in Sophora japonica. It appears at all stages of the growth of Sophora japonica. The main manifestation is the appearance of necrotic spots on the branches, which gradually expand or spread around the branches and become slightly sunken. As the bacteria spreads, many small black spots will appear on the trunk, and the branches will slowly wither, possibly accompanied by rotting of the underground parts.

Prevention and treatment methods

During the pruning process, avoid pruning too hard, water the plants in time, and appropriately supplement phosphorus and potassium fertilizers to enhance the plant's disease resistance. During construction in spring and autumn, the cut ends should be treated and coated with wood ash or lime sulfur to prevent bacterial infection.

Prune diseased branches promptly and deal with them centrally. Spray carbendazim suspension in time when the disease occurs.