Common pesticide formulations application method

There are many types of pesticides, and each pesticide has different types of dosage forms. Different types of pesticides require different methods of application. Appropriate application methods can not only improve control efficiency, reduce costs, but also reduce environmental pollution and improve safety. It is very important to master the correct application method of commonly used pesticide formulations. Now it is briefly described as follows: 1. Emulsifiable concentrates are prepared by dissolving each other with a certain amount of emulsifier and organic solvent. The emulsified oil has strong permeability and good dispersibility, and it becomes emulsion when diluted with water. Its application methods are: 1. Spray method. The emulsifiable concentrate is diluted with water to a desired concentration and sprayed uniformly onto the crop or other control object using a sprayer. When shaking the spray, shake the handle at a constant speed to maintain a relatively stable spray quality. Do not shake after shaking the handle several times. When spraying, the nozzle is required to be more than 0.5 meters above the crop so that the fog bead can be evenly attached to the foliage. The amount of spraying is sufficient to moisten the leaves and the liquid does not flow down from the leaves. General short crops Mushi 50-75 kg, tall crops Mushi 100-125 kg. 2. Soaking method. Dilute the emulsifiable concentrate with water to soak the seeds. The amount of liquid medicine is immersed seeds, which is generally more than 2 times of the seed weight. When soaking seeds, the seeds can be placed in a coarse cloth bag or gauze bag, first placed in clean water for pre-soaking, and then drained and immersed in a matching liquid. When soaking, pay attention to the concentration of soaking seed, soaking temperature and soaking time. 3. Seed dressing method. The pesticide and seeds are evenly mixed to kill pathogens and pests on the seeds. When spraying, mix and spray while spraying. Continue spraying till the seeds are all wet, and then cover the membrane for a few hours before proceeding. Second, the powder will be mixed with pesticides and clay or clay crush. Powders are not easily wetted by water, cannot be dispersed and suspended in water, and therefore cannot be sprayed on water. Its application methods are: 1. Powder spraying method. The powder is uniformly sprayed on the crop or control object using a duster. Powder particles can flutter in the air, so the dusting should be carried out when there is no wind and no updraft on sunny days. In the early morning and early evening, the general wind is the best time for dusting. The amount of dusting should be uniform and the leaves should be slightly powdered by hand. However, there is no powder on the leaf surface. Normally, the spray amount is 1.5-2.0 kg per mu. In the seedling stage of crop growth, dusting should not be used. 2. Seed dressing method. Put the powder together with the seed into the stirrer and stir at 30 rpm for 3-4 minutes. The ratio of powder to flour is 1:100-500. 3. Poisonous soil method. Dust and fine soils are mixed into toxic soils for furrowing (sinking), spreading (seeding) or mixing with seeds. When applied to the ground, it requires moist soil. Third, the wettable powder consists of a water-soluble original drug, a humectant, and a filler that are mixed and crushed together. Can be diluted with water to a certain concentration of emulsion, its efficacy longer than the powder, but poorer than the emulsion. Its application methods are: 1 spraying method (the same as 1); 2 soaking method (the same as 1); 3 splashing method: adding - quantitative wettable powder to a larger amount of water, the amount of water is generally 5 times the amount of water spray, Sprinkle with a scoop. Fourth, water agent, also known as water solvent, is dissolved in water by the original drug directly dissolved in water plus a small amount of surfactant preparation. The liquid agent is not easy to store, has poor wettability, and is not easily adhered to the surface of the plant, and is sprayed with water when used. Fifth, the granules are added to the granular carrier with the original drug, and a granular agent made of a water-soluble coating is added. The granules have large particle size, fast falling speed, little influence by wind, and are suitable for soil treatment and paddy field application; granules gradually release medicaments, have long drug efficacy period, and have smaller dosage, so they can also be used for the heart of various crops. Apply medicine. Sixth, the smoke agent from the pesticide raw materials, fuel, oxidants, combustion additives and other mixed. Its application method is to ignite fumigation. Because the smoke will quickly dissipate when it encounters wind, it can only be used in closed or closed windless environments such as warehouses, greenhouses and greenhouses.

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