First, pay attention to the choice of pesticide dosage form The pesticide used for soaking seeds should be selected from water-soluble dosage forms. The pesticides of this type include wettable powders, water-based agents and emulsions. Can not be soaked with non-wettable powder, because this powder is insoluble in water, it floats on the water surface or sinks to the bottom of the water after it is added to the water, which will cause uneven seed contamination and will not achieve the effect of soaking and sterilizing. Second, the concentration of the drug solution should be accurate The concentration of the agent used for soaking seeds is generally calculated based on the active ingredient content of the agent. The concentration of the soaking agent is related to the soaking time. The concentration of the soaking time is slightly longer, and the soaking time is higher. If you do not know the exact concentration, it is easy to cause phytotoxicity or reduce the soaking effect. Third, master the soaking time There is a certain time requirement for soaking seeds. If the soaking time is too long, it will cause phytotoxicity. If it is too short, it will not achieve the purpose of disinfection. The specific soaking time should be strictly in accordance with the instructions for use of the medicine, and it should not be operated by your own convenience. 4. Seeds after soaking should be washed and dried with water. Seeds with poor tolerance to the drug should be rinsed with water as required after immersion to avoid phytotoxicity. Of course, if the instructions in the pharmacy do not say that they are washed after soaking, they do not need to be washed. Whether it needs or does not need to be washed, it should be spread out after soaking and then planted. Fifth, the liquid level is higher than the seed surface When soaking seeds, the liquid level should be at least 16 cm higher than the surface of the seeds, so as to prevent the seeds from swelling and exposing the liquid surface to affect the soaking effect. Six, to fully stir After the seeds are placed in the liquid medicine, they should be thoroughly stirred to eliminate the air bubbles in the liquid medicine, so that the seeds and the liquid medicine can be fully and uniformly contacted, thereby improving the seed soaking effect. Venous cannula is also a deep venous puncture catheter. The method is to select the appropriate puncture site and insert the needle under the skin, and insert the needle with negative pressure until the dark red blood is absorbed, indicating that the needle has entered the vein, and the guide wire is inserted. Withdraw the puncture needle to leave the guide wire in the blood vessel, and then insert the venous catheter that needs to be indwelled along the guide wire, then exit the guide wire, inject diluted heparin saline and fix the catheter, the deep venous catheterization is completed. The veins for puncture and catheterization are usually selected clinically, including the subclavian vein, internal jugular vein, and femoral vein. After the puncture catheter is indwelled, attention must be paid to the care of the puncture site to avoid infection with thrombus or catheter falling off. venous cannulation,best veins for cannulation,venous cannulation set,venous cannulation technique Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yypcr.com