1. Black spot: when the light is insufficient and the humidity is high, black spots will appear on the plant, and then gradually expand and increase, and finally form a large area together, which will cause the whole plant to lose the ornamental value, and the whole plant to rot, leading to fundamental damage. Strengthen the management of plants. Do not drench water from the top when watering. Remove the diseased plants with black spots immediately, spray with fungicide, and then expose them to the sun to completely eliminate the mold on them.
2. red rot : this disease is caused by bacteria. At the beginning of the disease, there are only small spots of red brown, then the number increases, the area expands, and finally leads to all rot. Culture soil should be disinfected in time, not using immature liquid fertilizer. Pay attention to ventilation at ordinary times, and spray bactericide regularly to control the condition in time, and play a certain effect.
1. Scale insect: this kind of pest is relatively common and has a wide range of hazards. It will live on the plant, causing weak growth and breeding of other diseases. Once it is found that it needs to be scraped off in time, then spray it with dimethoate mixed with dichlorvos.
2. Red spider: they will lie on the top of the plant and suck the juice inside, resulting in rust color and weak growth in the affected area. To do a good job in prevention, can not be in the sultry environment, if the onset of a timely spray.
