Soil disease means that the pathogen is latent in the soil with the plant disease or in the form of pathogen spores, mycelia, etc., and after the host encounters the host in the next cultivation season, a new infection cycle begins. It is mainly soil-borne pathogens, but seed potatoes are also the main carrier media. Potato soil-borne diseases mainly include black shank, dry rot, scab, and whitefly disease. On the one hand, the prevention and control of soil diseases should reduce the source of infection in the soil, and on the other hand, reduce the pathogens carried in the seed potatoes. Therefore, integrated prevention and control is an effective way to control soil-borne diseases. Black plague 1. Selection of resistant varieties: appropriate selection of early maturing varieties can alleviate the occurrence of the disease. 2. Biological control: Trichoderma has a good control effect against the diseases of Rhizoctonia solani. 3. Agricultural control: Rotation: Rotating with non-host crops such as oats and soybeans. If the disease occurs more seriously, it should be carried out for at least 3 to 5 years . Disease-free seed potato: Select the seed potato with no sclerotia on the surface of the tuber. Accelerate emergence: suitable for late sowing, determine soil temperature; sowing thickness does not exceed 5 cm, try to shorten the emergence time, reduce the probability of pathogens infecting young shoots. Control soil temperature: minimize irrigation before emergence and control soil temperature. Fusarium wilt and dry rot 1. Biological control: Trichoderma harzianum T-22 strain, which can inhibit the growth of some fungi such as Rhizoctonia solani, Pythium, etc., can be used to treat seeds, irrigate greenhouse soil or carry out ditch application, and can be used in crop roots. All parts of the plant are colonized and can last for a long time, with obvious control effects in the greenhouse and in the field. 2. Agricultural control: strengthen field management, remove field diseased plants and litter to reduce soil colonies. 3. Chemical control: Seed potato treatment: 1 After 2.5% seed coating agent (Fluoridonitrile), the seed coating is applied, and 100 to 200 ml of seed coating agent is needed for each 100 kg of seed potato . 2 or good rick ( 43% suspension, active ingredient: tebuconazole), the dose is the recommended concentration. Scab 1. Rotation : The occurrence of scab disease is closely related to the rotation, so it is best to rotate with non-tuber vegetables such as Cucurbitaceae, Leguminosae, Liliaceae, etc., according to foreign research, preferably for 4 years . 2. Use resistant varieties: such as Marcy, which is highly resistant to potato scab in the United States . 3. Agricultural control: The scab disease rarely occurs in the soil below pH 5.0 , and the cultivated potato should be selected from acidic soil. Under the same conditions, water is not watered multiple times. 4. Chemical control: Seed potatoes can be soaked with 0.1% hydroquinone for 30 minutes, or 0.2% formalin solution for 10 to 15 minutes. Whitefly disease 1. Reasonable rotation: It is best to carry out the treatment during the rotation process. 2. Agricultural control: control soil moisture and increase ventilation. 3. Chemical control: Soil treatment and seed potato treatment with Fu Shuai, 230 ml / . Suitable area: potato production area in the north. We, Jiangsu YanFang Medical Technology Co., Ltd, commenced our medical gloves manufacturing in 2020. Currently, we possess a total of 12 high-capacity NBR Glove Dipping Production Lines. Medical Grade Nitrile Gloves,Nitrile Grade Medical Gloves,Medical Examination Nitrile Glove,Blue Examination Nitrile Gloves Jiangsu Yanfang Medical Technology Co.,Ltd. , https://www.yanfangchina.com
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Potato soil-borne disease comprehensive control technology