How to prevent and control burdock pests and diseases? A detailed explanation of the latest control methods
Burdock is a biennial or triennial herbaceous plant of the Asteraceae family. It is both a vegetable and a medicinal herb, with extremely high edible and medicinal value. At present, many regions in China have begun to cultivate it. After years of development, its planting area is quite considerable, but during cultivation it suffers from pests and diseases, which affect the yield and quality of burdock. So how should burdock pests and diseases be prevented and controlled? Let's take a look.
1. Black spot disease
Black spot disease mainly damages the leaves and stems of burdock. When it occurs, multiple small spots appear on the leaves, and the multiple spots merge together, causing the leaves to wither. When humidity is high, the spots are rust-brown, and a black mold layer grows on the spots. When the stems are infected, oval spots appear. As the disease develops, the spots become sunken, turn black and moldy, and finally cause the entire plant to lodge.
Control methods: For diseased plants, remove the diseased leaves in time, and after harvest remove the diseased residues, burn them in a centralized manner or bury them deeply. When the disease occurs, spray chlorothalonil, captan and other chemicals for control.
⟦NL>2. Powdery mildew
It mainly damages the leaves of burdock. Affected leaves show unevenly distributed white powdery spots, and later the powdery spots merge together, covering the leaf surface with a large amount of powder until the leaves wither and turn yellow. In warm and relatively humid environments, this disease occurs more severely. In addition, insufficient soil fertility or excessive application of nitrogen fertilizer can also induce this disease.
Control methods: Strengthen field management, increase base fertilizer application, pay attention to a reasonable combination of nitrogen, phosphorus and potassium, avoid excessive application of nitrogen fertilizer, and increase the disease resistance of the plants. After the rainy season, drain water in time to reduce humidity. Triadimefon or wuyimycin can also be sprayed for control.
3. Angular leaf spot
It mainly damages plant leaves. When the disease occurs, water-soaked spots appear on the leaves. In the early stage they are light brown and polygonal, and ultimately cause the leaves to perforate and die. Stems can also be infected. In the early stage of stem infection, they are also water-soaked, extending longitudinally along the stem, and in severe cases cause cankers or cracks, turning brown and drying up.
Control methods: In the early stage of the disease, spray copper succinate-glutarate, copper oxychloride, succinate·fosetyl-aluminum and other chemicals for control, with good results.
4. Insect pests
The insect pests of burdock mainly include wireworms, aphids and white grubs. They all cause damage as larvae or adults, sucking plant sap or gnawing on stems, leaves and tubers, affecting the quality and yield of burdock.
Control methods: Phoxim emulsifiable concentrate or dimethoate emulsifiable concentrate can be mixed with bran and scattered in the field in the evening for trapping and killing. Phoxim emulsifiable concentrate, dimethoate emulsifiable concentrate, trichlorfon and other chemicals can also be sprayed directly, but attention should be paid to alternating the chemicals to avoid developing resistance.
The above are the control methods for burdock pests and diseases. We hope they can help you. If you want to learn more related knowledge, please follow us.