Symptoms: The entire growing period of protected areas or open fields is widespread, and the rate of serious diseased plants is as high as 80% to 100%. The seedling stage often causes a large number of deaths. The disease mainly begins in the rhizomes, and the initial disease becomes brown and contracted. The disease grows up and down along the diseased part, causing the roots or young roots to brown and rot. When the humidity is high, it is gray and white. Under dry conditions, the epidermis of the diseased part often falls off, causing the leaves to droop or dry. Adult stage disease often causes browning and rot in the roots and roots. Sometimes the petiole of the base is gray-brown or purple-brown rot and necrotic, and it expands continuously, causing wilting of the whole plant.
Transmission routes and onset conditions: The pathogens overwinter in the soil with the diseased body. The bacteria can survive in soil for 2 to 3 years. Irrigation water or rainwater, and fertilization of fertilizers, soil spread. The bacteria can grow at 6-40°C, and the optimum temperature is 20-30°C. When the soil is wet or free water, it is easy to develop. Humidity in the field is high, and there is a heavy water or fertilizer.
Non-pollution control methods: 1 application of organic fertilizer, the selection of disease-free soil seedlings, suitable for the depth of sowing, cover soil should not be too thick. 2 The old seedbed with bacteria or suspicion of colonization is diluted to 1000 times with a 30% benzothiophene (Beisheng) emulsifiable concentrate 5 ml diluted with 5 kg of water per 667 square meters. 3 In the early stage of onset, spray 30% times of emulsifiable concentrate 1000-1200 times or 80% more. Fortune Zinc (Green Hunt No. 2) Wettable powder 800 times. 4 Drain the water in time after the rain to prevent the moisture from remaining. In combination with the cultivator, remove the diseased leaves from the base.
Transmission routes and onset conditions: The pathogens overwinter in the soil with the diseased body. The bacteria can survive in soil for 2 to 3 years. Irrigation water or rainwater, and fertilization of fertilizers, soil spread. The bacteria can grow at 6-40°C, and the optimum temperature is 20-30°C. When the soil is wet or free water, it is easy to develop. Humidity in the field is high, and there is a heavy water or fertilizer.
Non-pollution control methods: 1 application of organic fertilizer, the selection of disease-free soil seedlings, suitable for the depth of sowing, cover soil should not be too thick. 2 The old seedbed with bacteria or suspicion of colonization is diluted to 1000 times with a 30% benzothiophene (Beisheng) emulsifiable concentrate 5 ml diluted with 5 kg of water per 667 square meters. 3 In the early stage of onset, spray 30% times of emulsifiable concentrate 1000-1200 times or 80% more. Fortune Zinc (Green Hunt No. 2) Wettable powder 800 times. 4 Drain the water in time after the rain to prevent the moisture from remaining. In combination with the cultivator, remove the diseased leaves from the base.
Dingmin Pharmaceutical supply Velpatasvir API and Velpatasvir Intermediates with high purity and best price. The main products CAS No are as follows: 1377049-84-7, 1378388-16-9, 1335316-40-9, 1438383-89-1. Sample can be sent if you request.
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Cas 1335316-40-9,Velpatasvir Intermediates,11-Dihydro-5H-Dibenzo
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