Symptoms: this disease often occurs in outdoor maintenance, the branches and leaves of Campanula are gray, seriously affecting the value of viewing, if not dealt with in time, it may cause problems in the growth.
Prevention and control: take prevention and control measures in advance, and pay attention not to rain, so as to reduce the possibility of disease. If you are not careful, you need to cut off the diseased branches and leaves in time, and then concentrate to destroy them. Also need to cooperate with dispensing, can spray fungicide, the effect is better
Symptoms: it mainly damages the tender branches, buds and leaves, stabs into these parts, sucks the juice inside, causes atrophy and deformation of the damaged parts, and the secretion will induce some diseases.
Prevention and control: before ventilation treatment, it can prevent the occurrence of insect pests, but also pay attention to spraying chemicals, can spray some Wanling, quick killing and other chemicals, once a week, 2-3 times in a row.
Symptoms: both adults and nymphs will parasitize on the plants, sucking on the buds, flowers, young fruits and young leaves of the plants. The growth of the damaged plants is very slow, which will cause withering and withering in serious cases.
Prevention and treatment: at the beginning of the disease, you can use 25% rotein emulsion or 40% dimethoate 800-1000 times solution, once a week, 3-4 times in a row can have effect
