At the present stage in our country, pesticide preparations are rapidly developing. Along with the overall development of the society, various preparations are constantly being reformed and improved, and they are developing toward high efficiency, safety, and convenience. Turning over the history of the development of pesticides, we can see that with the improvement of environmental awareness and the need for sustainable development, the demand for pesticide formulations in China is getting higher and higher.
In the 21st century today, with the advancement of science and technology in China and the increase in the level of production technology, insecticides have also achieved greater leaps than before. In the market, there are a wide range of pesticide products, a wide variety of pesticide formulations, how different pesticide formulations affect the product effect, and what types of formulations are more promising. As an agricultural resource person, we have greater responsibility than ordinary farmers. Obligation to understand the related principles, characteristics and advantages and disadvantages of pesticides! Let us explore the future development trends of different formulations…

 
01

Extensive EC and WP for use in the market

Emulsifiable concentrates and wettable powders are two types of pesticide formulations that are more basic in the agricultural field in China today.
Under normal circumstances, the quality of the cream is clear and transparent solution state. Compared with other pesticide formulations, EC is based on its own characteristics of stability, easy storage, good emulsifying properties, strong adhesiveness, and good results. It also has a relatively simple process, relatively low cost, low price, and has long been popular among dealers and farmers. Their favor. However, the use of a large amount of organic solvents in the manufacture of emulsifiable concentrates has the disadvantages of wasting resources and polluting the environment. Therefore, in terms of long-term development, EC will tend to develop “environmentally friendly”. The WP is composed of kaolin, original medicine, wetting agent, dispersant, and other additives. It is passed through equipment such as jet mill and agitation mixer. After initial mixing, the jet is crushed, mixed and stirred, and then finally tested.

According to related data, compared with EC, WP has a low production cost and can be packaged in paper bags or plastic bags. The biggest feature is convenient and safe storage and transportation, and packaging materials are easier to handle; more importantly, WP does not use solvents and Emulsifiers are safe to plants and are not prone to phytotoxicity. They are also safe for the environment. They can be used before fruits are bagged to prevent organic solvents from stimulating fruit surfaces. Therefore, WP is also the choice of most farmers. The disadvantage is that if the process is not reached, the solubility and dispersion are not good, which will have a certain effect on the effect.

 
02

Safe and effective micro-emulsions, water emulsions and common suspensions

Microemulsions consist of water, a small amount of organic solvents, original drugs, emulsifiers, and synergists.
It is prepared by high shearing machines and reactors, etc. The oil phase and the water phase are separately prepared and then sheared by a high shear machine and finally tested. The microemulsion is actually a water-in-oil state, which requires high emulsifiers and a large amount of use resulting in high costs. Compared with similar products, higher costs have become an important reason for limiting their own development. However, the microemulsion uses water as the main solvent, which saves a large amount of organic solvents and reduces the pressure on the environment. It is of great significance for maintaining the agricultural ecological environment and is conducive to the green development of the environment. Therefore, with the continuous improvement of the level of science and technology, if the cost can be reduced, it will be possible to gradually replace the traditional EC, the development of space is still great.
An aqueous emulsion is a liquid pesticide produced by dissolving an original drug and a solvent, and a pesticide formulation in which fine droplets are dispersed in water. Its tiny particles, up to the nanometer level, the particle size is generally 0.5 microns, through the increase of additives, improve the effect. The biggest advantage of water emulsions is that the dosage form is very environmentally friendly and has high production efficiency. It is consistent with the concept of sustainable development, but not all pesticide ingredients can be processed into water emulsions.
At present, suspension concentrates in China can be roughly divided into three types: water suspension, oil suspension, and dry suspension. The ordinary suspending agent to be referred to here refers to an aqueous suspending agent and an oil suspending agent.
(1) Aqueous Suspension: Also known as a rubber suspension, water is used as a dispersion medium. It does not cause problems such as flammability and phytotoxicity caused by organic solvents. (2) Oil suspension: One or more active ingredients of a pesticide form a highly dispersed and stable suspension system in a non-aqueous dispersion medium. The dosage form selected oil as dispersion medium, which is more safe and environment-friendly.
The dispersing agent has good dispersibility and spreading ability, high suspension rate, strong ability to adhere to the surface of the plant, and is resistant to rain erosion, so the efficacy is more significant and more durable than the wettable powder; Small, large active surface, strong penetrating power, no dust when dispensing, low cost, high efficacy, etc., and both the advantages of wettable powder and emulsifiable concentrate, can be wetted by water, and diluted with water to have good suspension. Is a widely used dosage form.

03

Promising dry suspension agent

Suspending agent particles are fine, reaching the nanometer level, and the particle size is generally 2-5 microns.
Suspension concentrates increase effectiveness by increasing auxiliaries; in addition, it broadens the processing channels for dosage forms; but its process is complicated, production costs are high, and production efficiency is low, which poses no small challenge to manufacturers.
Dry suspension agent: It is a granular preparation that is dispersed in water and used as a suspension.
As a solid, the dry suspension agent is usually composed of a carrier such as kaolin and white carbon, a raw drug, a wetting agent, a dispersant, a penetrant, and other additives. The data show that: at the 6th International Conference on Pesticide Chemistry in 1986, dry suspension agent was considered as an ideal pesticide formulation that not only had all the advantages of granules, but also had high dispersing performance of the suspension agent. It would be important for pesticide formulation processing. One of the development trends. In addition, the dry suspension agent does not use solvents, the processed particles are easy to flow freely, have a certain strength and easy to disintegrate, have a high suspension rate after dispersion and no dust generation, use safety, is becoming a hot spot for the development of new formulations. Therefore, in the future, agribusiness friends can focus on dry suspension agents.