1. Powdery mildew

This disease mainly damages the leaves of flowers, and sometimes the stems and petioles will also be damaged. In the early stage of disease, white spots will appear on the leaf surface, and its diffusion ability is very strong. All spots can be connected in a very short time. If not treated for a long time, the leaves will slowly turn yellow and wither. This disease is easy to occur when the air circulation is poor, the environment is too humid and the temperature is too high

Prevention and control: after the occurrence, the branches and leaves seriously affected by the disease can be trimmed first, and at the same time, drugs should be sprayed to increase the application of phosphorus and potassium fertilizer; After winter, all the diseased branches and leaves can be cut off and cleaned up. During daily maintenance, places with good air circulation must be selected for placement, and fans can be used to increase ventilation in summer

2. Botrytis cinerea

The disease mainly occurs in flowers. At the initial stage, small spots will appear in flowers, and then spread slowly, leading to the discoloration and ulceration of the whole flower; Its leaves are also affected, just like the state of flowers. The disease is also easy to occur in too humid environment, and the disease can be latent in winter and come on again the next year

Prevention and treatment: in the early stage of the disease, the flowers and leaves affected by the disease should be cut off and destroyed, and then controlled with drugs to reduce the surrounding moisture; Daily watering shall be carried out in the morning as far as possible

3. Black horn thrips

This pest mainly lives by sucking the flower juice of plants, resulting in the early withering of flowers

Prevention and treatment: spray with drugs