Symptoms: Manjusri has strong resistance and relatively few infected diseases. It may be infected with leaf spot, which is more likely to be infected in high temperature and humidity environment. The pathogen mainly occurs on the leaves. At first, it presents small brown spots, surrounded by halos, and then expands into round or irregular shapes. When the disease is serious, the spots will be connected together, causing the leaves to wilt and dry.
Prevention and control: first of all, we need to strengthen the maintenance management, timely remove the surrounding residual leaves, pay attention to the reasonable application of water and nutrients, enhance the robustness of the plant, and improve the resistance to disease. In the early stage of the disease, a little chlorothalonil or mancozeb can be sprayed, which can effectively remove the disease.
Symptoms: Manjusri can not infect many insects, which may infect scale insects. These insects will suck the juice in the plant, eventually affect the growth, resulting in problems in growth.
Prevention and control: if the quantity is relatively small, you can wash it with clear water first, or brush the insects down with artificial methods, which is safer and less harmful to the plants. If there is a large number of them, they need to be treated by spraying. They can spray Omethoate solution for prevention and treatment, and the effect is better.
