Symptoms: melasma is a common disease of peony, which will cause the leaves to dry up, thus affecting the overall growth.
Prevention and control: remove the pathogens in autumn, remove the previous leaves and branches, and spray a little 50% carbendazim 600 times solution before the germination in early spring. After the onset of the disease, it is necessary to spray 65% zineb 500-600 times, once every 7-10 days, almost 3-4 times in a row.
Symptoms: after the peony is infected, some round or irregular brown spots will appear on the leaves, leading to the chlorosis of the leaves and the appearance of yellowish brown spores on the back.
Prevention and control: the plants need to be planted in the place with good drainage, so as to play a preventive role. In case of disease, spray with 15% Triadimefon 800 times.
Symptoms: the damage area is large, and the leaves, petals, petioles, seeds, etc. will be affected.
Prevention and control: when pruning and pruning in winter, the diseased branches and leaves shall be cut off to prevent the occurrence of diseases. If the disease occurs, it is necessary to remove the diseased leaves in time, and then spray the medicine comprehensively.
Symptoms: the nematode will live in 5-10cm of soil, which will harm the root, cause root function problems and hinder its function.
Prevention and control: 15% aldicarb and 3% carbofuran can be sprayed after problems are found, and the effect is relatively good.
