1, emulsifiable

Emulsifiable liquid is a transparent liquid prepared from water-insoluble original drug , benzene, xylene, etc. and emulsifier. It is generally not turbid, stratified and precipitated after being sealed and stored at room temperature for 2 years. It is quickly and evenly dispersed into opaque water. Emulsion. The characteristics of emulsifiable concentrate are: high efficacy, convenient application and stable nature. Common varieties are 10% triadimefon EC, 25% scorpion venom, chlorine emulsifiable concentrate, 25% hunted emulsifiable concentrate, 20% daisy emulsifiable concentrate. The organic solvent used in the preparation of the emulsifiable concentrate is a flammable product, and safety should be paid attention to during storage and transportation. Organic solvents have a stimulating effect on young fruits of apples and pears, which can increase the pores of the fruit surface and reduce the smoothness of the fruit surface. It is recommended not to apply emulsifiable concentrate before bagging, especially some sensitive tree species and varieties.

2, water agent

Any pesticide that dissolves in water and does not decompose in water can be formulated into a liquid. The aqueous solution is an aqueous solution of the original pesticide, and the agent is uniformly dispersed in water in an ion or molecular state, and the concentration of the drug depends on the original drug.

The water solubility, generally the maximum solubility, is diluted with water when used. Compared with emulsifiable concentrate, the aqueous agent does not need an organic solvent, and can be sprayed by adding an appropriate amount of a surfactant, which has less environmental pollution, a simple manufacturing process, and a good drug effect, and is a dosage form that should be developed. Common varieties are 2% avermectin water, 40% hirudin water and so on.

3, the suspension is also called suspension

A viscous flowable suspension prepared by ultrafine pulverization using a water-soluble solid pesticide raw powder plus a surfactant, using water as a medium, such as 40% carbendazim suspension. Compared with wettable powder, it has the characteristics of small particle diameter, no dust pollution, strong penetrating power and high efficacy. It has the advantages of both wettable powder and emulsifiable concentrate, and can be mixed with water at will. After storage for a long time, due to the sinking of the suspended particles, precipitation may occur, and the use of the particles must be fully shaken to resuspend the lower particles to ensure the efficacy.

4, water-dispersed granules

The water-dispersible granules are obtained by mixing and processing granules such as a solid pesticide, a wetting agent, a dispersing agent, a thickener and the like, and rapidly disintegrating and dispersing into a suspension agent in the presence of water. The water-dispersible granule has the characteristics of good fluidity, convenient use, good storage stability, high content of active ingredients, and the advantages of wettable powder and suspending agent. The active ingredient of the water-dispersible granules is generally 50% to 90%, such as 50% imidacloprid water-dispersible granules.

5, wettable powder

It is a dosage form which uses a pesticide original drug, an inert filler and a certain amount of auxiliary agent, and is mixed and pulverized in proportion to achieve a certain fineness of the powder. Formally, it is indistinguishable from the powder, but it can be wetted and dispersed by water after being added to water due to the addition of a wetting agent, a dispersing agent, etc., and can be sprayed and applied. Compared with emulsifiable concentrate, the production cost is low, and it can be packaged in paper or plastic bags. It is convenient and safe to store and transport. The packaging materials are easier to handle. More importantly, the wettable powder does not use solvents and emulsifiers, and is safer for plants. It can be used before bagging to avoid the stimulation of fruit surface by organic solvents. Commonly used varieties are 10% imidacloprid powder, 70% methyl thiophanate powder, 80% Dasheng.

6, thick emulsion is also called water emulsion

It is made of water-insoluble pesticide, emulsifier, dispersant, stabilizer, thickener, cosolvent and water. It is an oil-in-water emulsion with opaque appearance and oil bead diameter of 0.2~2 m. . Compared with emulsifiable concentrate, it has the advantages of saving solvent, less pollution to the environment, and the efficacy is similar to that of emulsifiable concentrate. It is a new formulation with promising prospects. The preparation is diluted with water and used.

7, microemulsion microemulsion

Made of auxiliaries, emulsifiers, antifreeze and water, it is a transparent or translucent liquid, which overcomes the shortcomings of using a large amount of organic solvents in emulsifiable concentrates. Compared with emulsifiable concentrates, it is safe to store and transport, and has low environmental pollution. The liquid is less irritating and can be used before the fruit is bagged to avoid damage to the young fruit by the emulsifiable concentrate. Since the formed emulsion particles have a very small diameter, when the water is used, the white emulsion formed when the emulsifiable oil is used for water is not seen, so it is also called water-based emulsifiable concentrate and solubilized emulsifiable concentrate, and the dispersed particles of the medicament have a diameter of 0.01 to 0.1 m. Common varieties are 16% high-efficiency pyrethroid microemulsion, 4.5% high-chlorine microemulsion.

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