(1) Symptoms The seedlings that have just been excavated have no obvious symptoms on the ground. The seedlings suddenly fell to the ground and died. When the diseased seedlings were dug up, the stems near the epidermis were seen to be yellow and soft, and the external epidermis was contracted. Only the middle part of the tissue was linear. When the humidity was high, white cotton wool-like hyphae grew around the diseased part. . When the disease is serious, the seeds have not yet been unearthed and rot.
(2) Onset conditions The pathogen is a fungal disease. The pathogens in the form of oospores in the 12-18 cm topsoil overwintering, and long-term survival in the soil. In the spring of the following year, the spore sacs were germinated under suitable conditions and the buds were directly grown in zoospores to infect the host.
Field infections are mainly caused by the production of conidia and zoospores on diseased seedlings, which are transmitted by irrigation water or rainwater. The optimum temperature for the growth of pathogens is 15 to 16°C, and the temperature is suppressed at 30°C. The ground temperature suitable for this disease is 10°C. The low temperature is not conducive to the development of broad bean, but it is beneficial to the growth of pathogenic bacteria. In case of rain, snow, and cold currents, the incidence of seedlings is heavy.
(3) Control methods 1 Agricultural control Cultivation of sorghum, fitness cultivation; Reasonable irrigation, alternating wet and dry management; Selection of disease-resistant varieties, application of phosphorus and potassium fertilizers, treatment of soil with green grazing No. 4 biological pesticides; deep cultivation of frozen winter, spring field , summer and autumn high temperature baking fields.
2 The incidence of biological pesticides used Jinggangmycin 1000 times liquid, green enjoy 1 3000 times, or Shennongsu, Green enjoy 7, and so on.
3 Chemical agents can be controlled by low-toxic or moderately moderately toxic pesticides, 75% chlorothalonil 1000 times or carbendazim 500-1000 times. A pesticide can only be sprayed on the same crop once.
(2) Onset conditions The pathogen is a fungal disease. The pathogens in the form of oospores in the 12-18 cm topsoil overwintering, and long-term survival in the soil. In the spring of the following year, the spore sacs were germinated under suitable conditions and the buds were directly grown in zoospores to infect the host.
Field infections are mainly caused by the production of conidia and zoospores on diseased seedlings, which are transmitted by irrigation water or rainwater. The optimum temperature for the growth of pathogens is 15 to 16°C, and the temperature is suppressed at 30°C. The ground temperature suitable for this disease is 10°C. The low temperature is not conducive to the development of broad bean, but it is beneficial to the growth of pathogenic bacteria. In case of rain, snow, and cold currents, the incidence of seedlings is heavy.
(3) Control methods 1 Agricultural control Cultivation of sorghum, fitness cultivation; Reasonable irrigation, alternating wet and dry management; Selection of disease-resistant varieties, application of phosphorus and potassium fertilizers, treatment of soil with green grazing No. 4 biological pesticides; deep cultivation of frozen winter, spring field , summer and autumn high temperature baking fields.
2 The incidence of biological pesticides used Jinggangmycin 1000 times liquid, green enjoy 1 3000 times, or Shennongsu, Green enjoy 7, and so on.
3 Chemical agents can be controlled by low-toxic or moderately moderately toxic pesticides, 75% chlorothalonil 1000 times or carbendazim 500-1000 times. A pesticide can only be sprayed on the same crop once.
Dingmin Pharmaceutical supply Brexpiprazole API and Brexpiprazole Intermediates with high purity and best price. The main products CAS No are as follows: 5118-13-8, 66490-33-3, 913614-18-3, 70500-72-0, 913613-82-8. Sample can be sent if you request.
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Cas 5118-13-8,Brexpiprazole Intermediates,4-Chloro- Benzo
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