Guarding against dead seedlings in the summer

As the price of pepper last year was higher, the purchase price per kilogram was generally between 4-5 yuan. The income of farmers with higher management skills was about 10,000 yuan per acre. Therefore, there are many farmers who are currently preparing to plant and grow peppers. Hopefully, there will be a good crop for early crops; however, due to the high temperatures in summer and more rain, it is very easy to cause the death of peppers. So remind farmers to pay attention to prevention as soon as possible so as not to cause losses. First, the cause of dead seedlings 1. Bad environmental conditions 1 Climate factors continued high temperature Drought Light intensity or sudden heavy rain suddenly turned fine. 2 Soil factors Low-lying groundwater table High drainage Difficulties Poor soil permeability Poor soil layering; Soil thin soils Viscous-heavy plants Slow growth Malnutrition Poor growth Poor disease resistance. 2. Improper selection of varieties for planting large fruit, large leaf varieties or selection of non-heat resistant varieties. 3. Continuous cropping of the same field plots Peppers are grown every year or even with melons and solanaceous crops. 4. Diseases caused by the bacteria infection caused by the death of pepper is mainly caused by a combination of several diseases such as blight, epidemics, and virus diseases. Second, the prevention and control methods 1, select varieties of varieties of heat, disease resistance, long-term growth of late-maturing varieties. In general, small-fruit varieties are more resistant to heat and disease-resistant leaves than large-leaf varieties. Therefore, it is best to choose red peppers, line peppers, or small pepper varieties. 2. Seed treatment Soak the seed in warm water of 55°C for 15-20 minutes and then soak it in normal temperature water for 6-8 hours. After the seeds are full of water, drain the water and wrap it up with a damp cloth for germination. After 80% of the seeds are whitened and then sown. This can effectively kill some germs. 3, reasonable rotation to avoid melon, eggplant vegetables can be linked with rice, cruciferous, legume and other crops for 2-3 years of rotation. If the previous crop is not the best for paddy rice, it should be immersed for about one month to kill field bacteria and 25-30 kilograms of lime per acre when it is done. This has a certain effect on mitigating diseases and preventing dead seeds. 4. Strengthen the management of field implement the sorghum planting reasonable close planting Reasonable water after raining row of cultivating loose soil to prevent the humidity from being too high Increase the application of phosphorus fertilizer and potash fertilizer on the basis of applying base fertilizer to avoid partial nitrogen fertilizer so as to increase the plant disease resistance. 5. After the flowering of capsicum and capsicum on the surface evenly cover the surface of straw 2-5 cm thick, it can cool and moisten to prevent rain erosion and improve the physical and chemical properties of the soil. Improve the ventilation of the soil and promote the activity of microorganisms. Increase the effective nutrient in the soil to facilitate the root growth of the pepper plant. Plants are robust and reduce death. 6. Change irrigation methods Vigorously promote drip irrigation, sprinkling irrigation, and infiltrating irrigation to reduce soil and air humidity to make the soil dry and enhance the resistance of pepper roots. When the weather is hot, if the pepper is flooded with water, the soil moisture saturation permeability is poor and the roots of the pepper suffocate. Exacerbation of plant aging pathogens spreads through the water to spread the susceptibility of the plants. 7, chemical control in the high temperature and humidity season should be timely medication with 50% metalaxyl Mn Zn WP 700 times or 50% methemothep WP 700 times and other epidemic diseases; with 25% thiophanate-methyl Wettable powder 1000 times liquid or 25% Rhizoctonia WP wettable powder 600-800 times and so on against blight; spray 200-300 times liquid 5% bactericidal liquid or 1000 times liquid potassium permanganate antivirus disease above pesticide Spray about 3-4 times every 7 days or so and pay attention to the use of chemicals.

Our Heterocyclic Compounds has been developing from 2015 year, it is a relatively new class of compounds in our company. Our heterocyclic compounds conducted by a dedicated research and development teams. The R & D team focused on researching heterocyclic compounds, other products are performed by other technical team. Our goal is to catch up with the industry's professional heterocyclic manufacturer. At present our products are mainly composed of pyridine, pyrimidine, thiazole. In addition to our regular products, we accept any form of customized services, to undertake from grams to tons of production. After receiving inquiry, we will give a quotation within 2 working days with coa specifications,If you have special requirements, please provide details in the mail, we will combine the specific requirements and provide an accurate accounting of the costs of the offer. Under normal circumstances, we have the longest production cycle is not more than 45 days.

Heterocyclic Compounds

Heterocyclic Compounds,Cyclopropanecarboxylic Acid,Benzenedithiol Dihydrochloride

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