1、 Disease

1. Botrytis cinerea: this disease mainly damages the leaves of the plant, and disease spots will appear after the disease. If the humidity is relatively high, molds will grow. It is necessary to avoid rain at ordinary times. In addition, Bordeaux liquid can be sprayed for prevention and control

2. Brown spot disease: it will also harm the leaves of peony. There will be dots on the back of the diseased leaves, which will turn yellowish brown later. Generally, zinc or manganese zinc should be used for prevention and control

3. Erythema: purplish brown spots will appear on the leaves at the initial stage of the disease, and then it will expand slowly, eventually leading to the scorched leaves. Carbendazim or tolbuzine methyl can be used for control

4. This disease often occurs on the ground from June to April, which often leads to leaf blight. Diseased plants need to be removed in time to avoid mutual infection

2、 Pest

1. Beetles: there are many kinds of beetles that harm peony. Adults mainly eat leaves and flowers, while larvae feed on its roots and cause root rot. they need to be caught and eliminated in time

2. Scale insects: scale insects are also very common pests, and there are many kinds. Because it has a waxy shell on its surface, it is difficult to spray them with drugs. You need to brush them off with a brush

3. Aphids: aphids are usually harmful in spring. They will suck the juice of leaves, so as to curl the diseased leaves and affect the photosynthesis of plants. Usually with dimethoate emulsifiable concentrate, dichlorvos and other drugs to eliminate