The latest control methods for diseases and pests of Platycodon grandiflorus
Platycodon grandiflorus (balloon flower) is a perennial herbaceous plant. Its root system can be used as medicine, with effects of dispelling cold, resolving phlegm, soothing the throat and discharging pus. It is mainly used to treat externally contracted cough, sore and swollen throat and other symptoms, and is one of the major medicinal materials in China. At present, it is cultivated in all major regions of China, but during production, diseases and pests occur, directly affecting the yield and quality of Platycodon grandiflorus 1, and thereby affecting the income of medicinal herb growers. So how should the diseases and pests of Platycodon grandiflorus be controlled? Let's take a look together.
1. Anthracnose
Anthracnose mainly damages the base of the stems of Platycodon grandiflorus. In the early stage of the disease, small brown spots appear at the base of the stem, gradually expanding around the stem. In the later stage of the disease, the lesions begin to shrink, causing the plant to break and fall over from the diseased area. It generally occurs during periods of high temperature and high humidity.
Control methods: After the autumn harvest, thoroughly clean the field, burn the diseased and residual plants in a centralized manner and then bury them deeply, to reduce pathogenic bacteria. Strengthen field management, increase the disease resistance of the plants, and spray Bordeaux mixture and thiophanate-methyl solution for control in the early stage of the disease, with good results.
2. Septoria leaf spot
Septoria leaf spot mainly damages the leaves. When the disease occurs, round or nearly round white lesions appear on both sides of the leaves, and small black dots are also distributed on the lesions. These are the conidia of the pathogen. When the disease is severe, multiple lesions merge, causing the leaves to wither and die.
Control methods: Likewise, after the autumn harvest, thoroughly clear the field to reduce pathogens, and increase the application of phosphorus and potassium fertilizers to improve the disease resistance of the plants. In the early stage of the disease, spray thiophanate-methyl and carbendazim solution for control, once every 7-10 days. With 2-3 consecutive applications, good results can be achieved.
3. Fusarium wilt
Fusarium wilt can damage the whole plant. When the disease occurs, the base of the stem becomes dry and rotted, and turns brown. Its pathogen will continue to spread upward along the stem, eventually causing the entire plant to become diseased. Under high-humidity conditions, a pinkish-white mold layer appears at the base of the stem, ultimately causing the plant to wilt and die.
Control methods: Rotating with grass family crops can reduce the incidence of this disease. Diseased plants should be pulled out in time and taken out of the field, and the diseased holes should be properly disinfected. At the same time, pay attention to field humidity, and drain water in time after rain. When the disease occurs, thiophanate-methyl and carbendazim can be sprayed in the field for control.
4. Pests
The main pests of Platycodon grandiflorus are aphids and cutworms and the like. They suck the plant sap or bite the tender stems and tender roots, and in severe cases cause the plants to die, causing great harm.
Control methods: They can be controlled through a combination of agricultural, physical and chemical methods. In order to reduce overwintering pest sources, the soil can be plowed in winter to eliminate eggs, and electric lights and black lights can also be installed to trap and kill pests. Electric lights and black lights can also be used to trap and kill pests by making a solution for trapping and killing, and spraying insecticides can also improve control.
The above is an introduction to the control methods for diseases and pests of Platycodon grandiflorus. We hope it can help you. If you want to learn more related knowledge, please follow us.