1. Symptoms: caused by the infection of seminiflora. At the early stage of the disease, there are many brown spots in the leaves. If not treated in time, large black spots will appear, and the leaves will wither and die.
2, prevention and treatment: when the onset of disease should immediately use chlorothalonil 800 times liquid spray treatment on the leaf surface. Spray once every 7-8 days, 2-3 times in a row, and you will be basically cured.
1. Symptoms: the disease mainly damages the leaves, and generally occurs at the tip or edge of the leaves first. At the early stage of the disease, there were water spots on the leaves. In the later stage, the spots will gradually expand, and the diseased leaves will turn black brown and rot.
2. Control methods: remove the diseased leaves in time and burn them intensively to reduce the source of infection. To strengthen indoor ventilation, do not pour too much water on it. In the early stage, methyl tozin or carbendazim spray can be used for prevention and treatment. Spray once a week, 2-3 times continuously.
1. Symptom: the scale insect sucks the juice on the plant leaf, causing the leaf to produce the yellow spot. The environment with poor ventilation is easy to reproduce and does great harm to the scale insects.
2. Prevention and control methods: the environment for plant growth shall be ventilated and ventilated. Once the scale insects are found on the leaves, they should be treated by spraying chlorpromazine or killing emulsifiable oil in time. Spray once every 7 days, 2-3 times continuously.
