1、 Botrytis cinerea

Symptoms: this disease often occurs during outdoor maintenance. The branches and leaves of Campanula become gray white, which seriously affects the ornamental value. If it is not handled in time, it may also cause growth problems

Prevention and treatment: take prevention and treatment measures in advance and pay attention not to be exposed to rain, which can reduce the possibility of disease. If you accidentally get sick, you need to cut off the diseased branches and leaves in time, and then concentrate on destroying them. It also needs to cooperate with dispensing. Bactericide can be sprayed, and the effect is good

2、 Aphid

Symptoms: it mainly causes damage to tender branches, buds and leaves, stabs into these parts and sucks the juice inside, resulting in shrinkage and deformation of the injured parts, and secretions will also induce some diseases

Prevention and control: ventilation treatment shall be done before, which can prevent the occurrence of pests. Attention shall also be paid to spraying chemicals, such as Wanling, quick killing and so on. It shall be sprayed once a week for 2-3 times continuously

3、 Thrips

Symptoms: both adults and nymphs will parasitize on plants and suck on plant buds, flowers, young fruits and young leaves. The injured plants grow very slowly and wither in serious cases

Prevention and treatment: at the beginning of the disease, you can use 25% yutengjing EC or 40% dimethoate 800 ~ 1000 times solution once a week for 3-4 consecutive times