July and August are the seasons of precipitation in our city, and they are also summer and summer. In the case of high temperatures and heavy rainfall, the exposed vegetable crops are prone to disease hazards and difficult to control. There have been many cases of detrimental production due to unfavorable disease prevention and control over the years. The difficulty in prevention and control is that in addition to the conditions of disease proneness, the volatiles of the medicaments are increased when the temperature is high, and they are prone to rain erosion and affect the control effect. Therefore, pesticides in the rainy season should grasp the following four aspects: 1. Avoid strong winds and hot sun when applying pesticides In the high temperature environment of the hot sun, the plant metabolism is vigorous, the stomata of the leaves are open, and the phytotoxicity is prone to occur. At the same time, the drugs are easily volatilized and the control effect is reduced. It is safer to apply the drug at temperatures below 28 degrees. The best application time is from 8 to 11 am and 4 to 6 pm. 2, pay attention to the weather forecast, try to avoid spraying on rainy days Because the pharmacy can be easily washed by rain and reduce the efficacy, it should count the time for spraying. If emulsion pesticides are used, it will not rain for at least 24 hours after application. For some types of pesticides that are weakly adherent and easily leached, it takes at least 48 hours for rain to work well. 3, preference should be given to the strong absorption of pesticides Systemic pesticides can enter the plant body through the roots, stems, leaves and other parts of the crop, and are transported to other parts, which can play a preventive role in a certain period of time. For bactericides such as carbendazim, thiophanate, treprodew, and chlorophyll, 40% to 5 hours after the application of these pesticides, more than 80% of the active ingredients have been absorbed and transferred by the crop, reducing the risk of being washed away by rain. Effect of danger. 4, appropriate to add adhesive Aqueous agents and wettable powders have poor adhesion, and it is effective to add an adhesive or a film former in an appropriate proportion. Neutral laundry detergent may be added as an adhesive when formulating liquids. In addition, sugar, honey, mineral oil, and vegetable oils are also good adhesives (but be careful not to mistakenly add alkaline adhesives). Appropriate addition of one of the above-mentioned adhesive agents can enhance the adhesion of the pesticide on the body surface of the plant and reduce the erosion of the rainwater on the medicament, thereby improving the use effect of the pesticide.
The so-called pharmaceutical intermediates are actually some chemical raw materials or chemical products used in the pharmaceutical synthesis process. This chemical product does not require a production license for medicines, and can be produced in ordinary chemical plants. As long as it reaches a certain level, it can be used for the synthesis of medicines.
Explanation: Some chemicals used in drug synthesis Anti-Influenza Drugs,Api Oseltamivir Phosphate,Intermediate For Oseltamivir Phosphate,Vortioxetine Hydrobromide Intermediate Jinan Prosperity International Trade Co. Ltd , https://www.cnsrtrade.com
Purpose: Synthesis of medicines
Features: low profitability of production intermediates
Representative: fluorine-containing pyridines, etc.
Field: Medicine
Explosive vegetable rainy season spraying four attention