The main symptoms are: the leaves on the diseased branches wilted, the cortex of the branches withered and rotted, and the branches gradually lost water and dried up.
The causes of this disease are as follows:
1, long-term light is too weak, ventilation is not good, and trees grow weakly.
2. In winter, the temperature is too low, the water is too much or the temperature is too low and the humidity is too high.
3. The root system is severely damaged and grows poorly.
4. The air humidity is high, and the branches are badly bruised.
5. Cold air blows directly.
Preventive and control measures
1. In the process of turning pots, changing pots, filling pots, transplanting and transporting, the roots and branches should be damaged as little as possible, and the original soil balls should be kept intact as much as possible. 2. Indoor curing temperature should be kept above l0℃ in winter. Don't put African jasmine in a place where cold air can blow directly, and reduce watering. Don't water it if it is too dry, and keep the soil with 20% ~% water capacity. Don't put African jasmine in the place where the air conditioner blows directly in summer.
3. Don't put African jasmine near the wall, let alone in the corner, to prevent local poor lighting and ventilation from rotting. 4. Once the branches are found to be diseased, the diseased parts should be cut off immediately, and ventilation should be strengthened to reduce humidity, increase illumination, enhance disease resistance and prevent the spread of diseases.
Anyway. Appropriate temperature, bright light, good ventilation and reasonable fertilizer and water management are effective ways to prevent African jasmine from being infected with rot.