Symptoms: the disease first grows black spots on the leaves. At the beginning, it appears light black. At the later stage, it will gradually expand to form irregular shape. If the climate is relatively wet, it will cause rapid spread of the disease. Generally, the whole leaves will be affected in a few days.
Prevention and control: when it is found that the leaves are rotten, it is necessary to remove the diseased leaves in time, and then spray the medicine, which can be used.
Symptoms: not only leaves, but also stems, fruits and other places can be affected by rust. It is caused by fungal infection, which will affect local areas, causing damage such as leaves falling and poor growth.
Prevention and control: spray 2000 times of 50% weixiangling wettable powder solution. It should be noted that if the disease is found, it needs to be dealt with in time. If the disease is serious, it may cause the plant to die of water shortage.
Symptoms: it is mainly harmful to the root position, causing damage to the absorption function, resulting in difficulty in normal absorption.
Prevention and control: spray 80% Dibromopropane emulsion 50 times to eliminate the effect of insect pest.
