In many areas, potato cultivation has developed into a local economic industry. Years of planting have resulted in the survival, reproduction, infestation and harm of soil-borne bacteria, while potato scab is one of the most serious diseases in soil-borne diseases. The post-commodity rate is greatly reduced, which seriously affects the economic benefits of the growers and jeopardizes the healthy development of the potato industry. So what is the cause of potato sore disease? What are the symptoms? How should the growers control it? Analysis of the causes of potato scab: 1. The existence of pathogens: The soil itself carries the bacteria and the potato seed bacteria into the soil and then multiplies. In the case of proper control, there will be no hazard in the current season; in the case of improper control, the hazard will occur in the current season. The pathogen survives through the diseased body and the soil and continues to multiply and even live for up to ten years. 2. Soil pH: Bacteria have the best survival and reproduction environment at pH 6-7, while the suitable high yield of potatoes is 5.5-7.0. Because the use of chemical fertilizers to pursue high yields, the increase in soil alkalinity under continuous planting conditions is conducive to bacterial reproduction, and at the same time, it reduces the number of beneficial bacteria that are antagonistic. 3. After the variety is improved, the cortex is thinner and grows early and is easy to infect. 4. The imbalance between medium and trace elements is mainly due to insufficient use of calcium fertilizer and boron fertilizer. Lead to poor growth of potatoes and low immunity. Artificial watering or concentrated rainfall can cause bacterial pathogens to rapidly multiply or metastasize because of sufficient water sources. Therefore, the accumulation of water in low-lying plots is often more serious. The head of the water is often easy to become the focus of the spread. Bacterial bacterial sources have aerobic characteristics and breed rapidly in sandy loam soil and sandy soil with good ventilation. Therefore, sandy loam and sandy soil are often harmful. Symptoms of potato scab: The symptoms and control measures of potato scabs occur on the outside of the potato tubers. The small brown leaves grow slightly and form a large round or irregular large plaque with a diameter of about 0.5 cm. Due to the occurrence of a large number of cork cells, the outer surface of the lesion is slightly convex or prominent in the middle of the lesion. The important pathogen causing potato scab is Streptomyces scab, Streptomyces genus Streptococcus faecalis, and the branched cells are filamentous, and the hyphae and the cytoplasm are often spiral. Segmentation produces a large number of smooth outer mesenchymes. The pathogen is saprophytic in the soil or overwinter on the diseased potato. The contaminated fertilizer and diseased potato are important and original sources of infection. The important infective tuber of the pathogen invades from the lenticels and wounds, that is, the disease. Potato scab disease prevention and treatment method 1. Choose anti-sick disease type or disease-free seed potato, and do not switch from ward. Huangmazi, Yushu No.1, Yushu No.1 and Luyin No.1 are highly resistant to scab. 2. Apply organic fertilizer or green manure and apply acid fertilizer to improve soil acidity. Sticking to soil pH between 5 and 5.2 can inhibit the disease. 3. Stop the continuous cropping with Cucurbitaceae, Leguminosae, and Liliaceae for more than 5 years. No potatoes are planted on root crops such as red beet leaves, beets, radishes, kale, carrots, and European radishes that are susceptible to scab. 4. Choose land with good water retention, adhere to soil moisture during tuber growth, and water in real time during the potato season. After the performance, the field sickness was eliminated in real time and burned together. 5. The control of scab disease can be soaked in 0.2% formalin solution for 2 hours before the performance, or 100 grams of hydroquinone, 100 liters of water is added into a 0.1% solution, soaked for 30 minutes before the performance and then ejected Dry the work. In the early stage of the disease, apply 65% ​​mancozeb WP 1000 times solution, or 72% agricultural streptomycin 2000 times solution, or neomycin (1 million units) 5000 times solution, or DT wettable powder 500. Double liquid, or DTM wettable powder 1000 times liquid, or 50% ruinong wettable powder 600 times liquid, 77% can kill wettable powder 600 times liquid, etc., every 8-11 days, continuous spraying 3- 4 times. 6. After the autumn harvest, spread the tuber to remove the diseased potato, spray 72% agricultural streptomycin 2000 times liquid 50% carbendazim WP 800 times liquid, dry into the cockroach can prevent rotten cockroaches; spring is coming to germination Rotten potatoes can be used to reduce the incidence of diseases. In the case of low yield after land continuous cropping of potatoes, growers can consider planting other food or cash crops instead! Fruit juice drinks is a beverage made of fruit juice products obtained by physical methods such as pressing, centrifugation and extraction. Fruit juice retains most of the nutrients in the fruit, such as vitamins, minerals, sugar and pectin in dietary fiber. Often drinking fruit juice can help digestion, moisten the intestines and supplement the lack of nutrients in the diet. Juice Drinks,Honey Tea,Honey Citron Tea,Goji Berry Juice Xi'an Gawen Biotechnology Co., Ltd , https://www.agolyn-bio.com
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