What are the 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, eliminating phlegm, and soothing the throat and discharging pus. It is mainly used to treat externally contracted cough, sore and swollen throat, and other conditions, and is one of the major medicinal materials in China. At present, it is cultivated in all major regions of China, but diseases and pests occur during production, directly affecting the yield and quality of Platycodon grandiflorus 1, thereby affecting the income of medicinal farmers. So how should the diseases and pests of Platycodon grandiflorus be controlled? Let's take a look together.
1. Anthracnose
Anthracnose mainly harms the base of the stem of Platycodon grandiflorus. In the early stage of the disease, small brown spots appear at the stem base and gradually expand around the stem. In the later stage of the disease, the lesions begin to shrink, causing the plant to break and lodge from the affected 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, then bury them deeply to reduce pathogenic bacteria. Strengthen field management to increase plant disease resistance. In the early stage of the disease, spray Bordeaux mixture and thiophanate-methyl solution for control, with good results.
2. Leaf spot
Leaf spot mainly harms the leaves. When the disease occurs, circular or nearly circular white lesions appear on both sides of the leaves, and black small spots 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: Similarly, after the autumn harvest, thoroughly clean the field to reduce pathogens, and increase the application of phosphorus and potassium fertilizers to improve plant disease resistance. In the early stage of the disease, spray thiophanate-methyl and carbendazim solutions for control, once every 7-10 days. For 2-3 consecutive times, a good effect can be achieved.
3. Fusarium wilt
Fusarium wilt can harm the whole plant. When the disease occurs, the stem base is in a state of dry rot and is brown. Its pathogen will continuously spread upward along the stem, eventually causing the entire plant to become infected. Under high-humidity conditions, a powdery white mold layer appears at the stem base, ultimately causing the plant to wither and die.
Control methods: Rotation with grass-family crops can reduce the incidence of this disease. Diseased plants should be promptly pulled out and taken out of the field, and the diseased holes should be disinfected. At the same time, pay attention to field humidity, and drain promptly after rain. When the disease occurs, spray thiophanate-methyl and carbendazim in the field for control.
4. Pests
The main pests of Platycodon grandiflorus include aphids and cutworms and the like. They suck plant sap or bite tender stems and tender roots, and in severe cases can cause plant death, with 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 turned over 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, and spraying insecticides can also improve control.
The above is an introduction to the control methods for diseases and pests of Platycodon grandiflorus. I hope it can help you. To learn more related knowledge, please stay tuned to us.