Symptom: grey mould is the main disease of the big rock tung tree. The symptom of the disease is the brown soft rot on the pedicel. Starting from the edge of the leaf, brown spots will grow first, and then spread to the whole leaf. When the weather is wet, grey mould spots will grow on the leaf. When it is serious, the whole leaf and flower will turn brown, eventually leading to dry and dead.
Prevention and treatment: at the beginning of the disease, 80% zineb 500 times solution can be used, which is difficult to eradicate at one time. It needs to be sprayed 2-3 times, with an interval of about 10 days.
Symptoms: after the disease, it mainly damages the leaves and stems. Dark brown spots appear on the leaves. In the later stage, the stems of the upper part will be bent seriously.
Prevention and control: before cultivation, it is necessary to reduce the soil to avoid diseases. When there is a disease, the sick plants need to be pulled out and destroyed in time.
Symptoms: This is one of the most common diseases, mainly caused by nematode infection, which damages the young stem and branches and leaves of the plant, and finally causes the leaves to wrinkle, dry and die.
Prevention and control: before cultivation, the pot soil should be steam sterilized. If the disease is found, it should be pulled out in time and burned intensively.
Symptoms: they suck sap from leaves, causing them to fall off.
Prevention and control: after red spider appears, it needs to spray medicine as early as possible, such as dimethoate, huachongjing, kemaite, etc.
