Symptoms: it mainly occurs on the leaves, often endangering the edge and tip of the leaves. At the beginning, there are small spots on the leaves, which are reddish brown in color. At the later stage, when it is serious, most of the leaves will be dead and withered, and the damaged leaves are very easy to fall. This disease is easy to appear in the environment of high temperature and humidity. If the environment is airtight, it will be more serious.
Prevention and control: Daily ventilation and ventilation should be strengthened, the diseased leaves should be removed in time and burned to reduce the possibility of transmission. After the onset of the disease, the fungicides such as tefulin and chlorothalonil can be used for disinfection and sterilization, which is difficult to eradicate once. It needs to be sprayed every 10 days, about 2-3 times in a row to control the disease.
Symptoms: it is easy to appear when it is hot and humid. These pests will lie on the plant and suck juice, causing water shortage and drying of leaves and stems. In serious cases, it will lead to death.
Prevention and control: usually pay attention to good maintenance methods, timely ventilation management, and try to avoid pests. If there are fewer pests, they can be removed manually first. This method is safer, but it is not easy to eradicate. If it is serious, spray it with chemicals, and kill it with Omethoate.
