1. Root rot: the root system is the damaged position, which looks like it has been burned. The treatment of seed ball before planting, the selection of suitable soil and the spraying of fungicide on the soil after the onset of disease can play a role in disinfection and sterilization.
2. Rust: after the leaves are infected, yellow blisters will be produced, from which yellow powder will be emitted, leading to the drying and yellowing of the sick leaves, and even the early falling of the leaves. The resistant varieties were selected before planting, and the leaves were protected by spraying powder and rust tannin.
3. Leaf spot disease: this disease mainly infects the leaves. At first, there are small brown spots, and then they are connected into one piece, leading to serious disease and even death of the whole plant. Remove and burn the diseased leaves in time and spray zinc and carbendazim regularly.
4. Grey mould: after infection, plant growth is affected, and part of the ground is covered with grey spore net, causing plant lodging. When the disease occurs, it needs to be treated with fungicide.
The borer is a common pest, which will damage the roots, leaves and flower buds, leading to root rot, damaged leaves and brown flower buds. Pick the leaves and burn them in time, spray Omethoate or kill the moth pine when the larvae are hatching.
