1. White silk disease: after infection, the disease begins to have dark brown spots, and then develops into white mycelium, which will cause the whole plant to die in serious cases. Cut off and pull out the diseased plant in time after the onset of the disease, and spray carbendazim solution regularly.
2. Black spot: the damage of this disease is relatively serious. At the beginning, there will be dark brown spots on the surface of the leaves, and then the irregular lines will be expanded, and the spots will gradually connect, leading to the dry and falling of the leaves. After the onset of the disease, the diseased leaves were removed in time, concentrated and burned, and then Bordeaux solution and zineb were used.
3. Rust: small yellow brown spots appear at the beginning, and then turn to orange yellow, and yellow powder will be emitted later. It is difficult to eliminate it at one time, and it can be sprayed 3-4 times continuously with zinc diesen or carbosulfan mixture.
1. Grub: it will bite the root, causing branches and leaves to wither and turn yellow. It can be treated by spraying marathon emulsion.
2. Scale insect: it will suck juice, leading to weak growth. You can use a brush to brush down first, and then spray low toxic and insecticidal drugs in time.
3. Beetle: affected by this pest, it will cause root rot in addition to biting leaves. Cut off the diseased branches and leaves in time, then spray dichlorvos.
