How to choose pesticide formulations? When choosing, first consider the crop's control object, the application equipment, and the conditions of use. At present, most formulations of pesticides in China are suitable formulations for spraying, of which mainly emulsifiable concentrates and wettable powders, and one is a suspension agent. The main differences between these three dosage forms are as follows:
First, the efficacy of EC for pesticides is significantly higher than that of suspensions and wettable powders. The active ingredient of the same pesticide is preferably EC. Fungicides for foliar sprays, which are generally oil-based formulations, are not good for bactericidal action, so suspension or wettable powders should be chosen. For herbicides for foliar spraying, weeds, emulsions, suspensions, and other formulations containing organic solvents can be used due to the presence of a waxy layer on the surface of weeds. Herbicides, granules, and other formulations that can be formulated into toxic soils are used more often in paddy fields or in soil.
Secondly, as an alternative formulation of emulsifiable concentrates, the efficacy of the suspension concentrates is second to that of the emulsifiable concentrates, but it is significantly higher than that of the wettable powders. The various additives contained in the concentrates facilitate the adhesion of the drug particles to the surface of the organism, thereby improving the efficacy of the drug. . Compared with emulsifiable concentrates, concentrated emulsions and microemulsions use less or less organic solvents, and are safer to use and have better efficacy. However, the manufacturing cost is slightly higher and the price is slightly higher.
Third, from the safety considerations of the pesticide application personnel, the spraying of oil under hot weather, the oil as the medium of the EC is prone to cause poisoning, and it is best to use the same kind of water-based formulations, such as wettable powder, suspoemulsion, soluble powder. Water dispersible granules.
Fourth, there is currently the same dosage form of the same active ingredient pesticide, but there are many cases of different dosage formulations. When selecting a high-level preparation, the amount of the drug per unit area can be used to calculate the relative cost of the product.
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