1、 Disease aspect

1. Rust: in the early stage of infection, small yellowish brown spots will appear on the leaves. If not treated in time, the spots will grow longer and larger in the later stage, which will eventually affect the growth. You can spray powder rust Ning solution or sodium dichromate solution every half a month. Generally, it can be cured by spraying several times

2. Black spot: at the beginning, small dark brown spots will appear in the middle of the leaves, and then gradually infect and affect the whole leaves. It is generally common in Meiyu season. Can spray some carbendazim, the treatment effect is also good, this condition can not be delayed

3. Powdery mildew: the symptom is that there will be white powder spots on the leaves, which will infect other leaves. The white powder shall be removed in time. If the situation is serious, the leaves can be cut off directly, and a little antimycotic solution shall be sprayed on the plant once every half a month

4. Other diseases: in addition to the above, frost coal disease and mosaic disease may also occur. The leaves need to be cut off first and then sprayed with chemicals

2、 Pest aspect

Pests are also serious. Starscreams and aphids are very common and are the main pests endangering them. They can be removed manually first, or some self-made pesticides can be prepared. If the quantity is very large, spray more Omethoate emulsion solution, which can have a good effect