The main diseases of legume green are ring spot, stem rot and so on.
Infected with ring spot disease, bean green will appear ring-shaped necrotic spots on the leaves, leaving the leaves twisted, and the plants grow slowly or do not decay for long and do not like to blossom. Bordeaux can be sprayed regularly for control.
Bean green infected with root rot disease, root part will not appear black spots, and gradually rot. In addition, the symptoms of scab caused by Douban green infection were basically the same as that of canker's disease. Spray with 50% carbendazim WP 1000 times.
The common pests are scale insects and slugs.
I'll start with slugs, which look like snails without shells. This disease rarely occurs in family breeding. Once it appears, it will drill and eat the leaves of plants, causing the plants to wither. It's said that it can be killed by spraying salt on them. It can be tried.
Scale insects are common pests in the cultivation of watercress in the family, which are more likely to occur in the high temperature and humidity environment. When the disease occurs, the insects will attach to the leaves and absorb the juice, causing the plants to wilt. It can spray Omethoate solution or disinfectant in advance to prevent the disease.
