At present, there are many dosage forms of pesticides , some of which have different names but their uses are the same. Some dosage forms have the same use but different methods of use. Pesticide users should decide which dosage form and preparation to choose according to the crop and the control object, the application equipment and the conditions of use.

At present, the types of pesticides in China are still relatively small, and most of the production and use are suitable for spraying. Among them, emulsifiable concentrates and wettable powders, and suspending agents also have considerable yield. From the pharmacological analysis, the three dosage forms are somewhat different.

First, the efficacy of the pesticide's emulsifiable concentrate is significantly higher than that of the suspending agent and the wettable powder. The same active ingredient of the pesticide is preferably selected from the emulsifiable concentrate. The fungicide for foliar spray, generally in the form of oil as a medium, is not beneficial to the bactericidal effect, because the penetration of the bactericide into the cell wall and cell membrane of the pathogen is a fungicide molecule dissolved in the leaf water film, and does not need The assistance of oily organic solvents may even hinder the diffusion penetration and systemic action of the drug molecules. Therefore, it is preferred to choose a suspending agent or a wettable powder. Herbicide for foliar spray, because there is a wax layer on the surface of weed leaves, emulsifiable concentrate containing emulsion of machine solvent, concentrated emulsion, suspoemulsion, etc.; wettable powder and suspending agent with good wetting and osmosis The dosage forms can also be used; the herbicides applied to the paddy soil or soil in the paddy field are used more in the form of granules and other dosage forms capable of formulating toxic soil.

Second, as an alternative to the cream, the suspending agent is second to the emulsifiable concentrate, but significantly higher than the wettable powder. Since the particles of the suspending agent are much finer than the wettable powder, the various adjuvants contained in the suspending agent facilitate the adhesion of the agent particles to the surface of the living body, thereby improving the efficacy.

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