In recent years, dead trees have become more and more serious in the production of protected areas and peppers in the early spring, which has resulted in reduced production, reduced farmers' income, and has affected the enthusiasm of farmers in planting peppers. Dead trees are caused by blight, diseases, sclerotia, and bacterial wilt. According to the author's many years of investigation and research, the occurrence of dead trees is related to the causes of stress, climate, etc., and has a lot to do with seedlings before the planting of seedlings in Datian. If the seedlings are infected with bacteria, the incidence is heavier, if they do not carry the bacteria, even if Also less severe. Therefore, the cultivation of disease-free strong seedlings is an important measure to reduce disease. Should do the following aspects of work. 1, bed soil disinfection: nursery bed soil to choose disease-free garden field soil, otherwise bed soil disinfection, method is: 15 to 20 days before sowing, the bed soil loose, bed soil per square meter with formalin 30ml , Add 2~4kg of water, spray on the bed, and then use the film cover 4 to 5 days to remove the film, then loosen the surface, after half a month, until the drug gas completely evaporated, before sowing. 2. Seed disinfection: To prevent seed tape, apply liquid soaking or chemical seed dressing before sowing for disinfection. (1) Liquid soaking: Pre-soaked with cold water for 4 to 5 minutes, and then put in 1% copper sulfate solution for 5 minutes to kill germs on the seed surface; soaking seeds with 10% sodium phosphate solution for 20 minutes can remove the seed surface Virus. After soaking, remove and wash with water and sow. (2) Chemical seed dressing: seed dressing with 0.2%~0.3% of 40% EB aluminum wettable powder can also be used for seed surface disinfection. 3. Temperature and water management during nursery period: In the spring and early spring, the protection of greenhouses and peppers in the open season is due to winter and spring. The seedlings must be nursed in the protection facilities. Attention should be paid to seedling temperature and water management, especially water management. Nursery seedbed temperature should be kept above 12 °C, pay attention to cold insulation, ventilation and hardening seedlings to improve seedling disease resistance. Sub-seedlings generally do not water, such as the seedbed is too dry, watering can be used properly sprinkler, but the amount of water should not be too large, spray after the selection of sunny afternoon leaves when the bead is no time when the soil. At this time can not be poured with water, so as not to bed soil moisture is too large, damping-off disease, blight and other seedling disease. If the seedbed is divided into seedlings, when the seedbed is too dry and watered, care must be taken not to pour it. Use a watering can or sprinkler on the tube to spray water properly. There is no need to flood the seedlings to minimize the humidity in the seedbeds and facilities as an important measure to prevent disease. 4. Disease prevention and treatment: If diseased seedlings are found, they should be promptly removed to prevent spread. Before and after the onset of the disease, and before the seedlings were planted in the field, they were sprayed once. The commonly used agents included chlorothalonil, anti-virus quinones, cupric ammonium mixture, Bordeaux mixture, and some compounded agricultural bactericides.
Antineoplastic,Antineoplastic Agents,Natural Antineoplastic,Methotrexate Antineoplastic
NOUVASANT PHARMhealth LTD. , http://www.nouvasant.com