Wettable powder and soluble powder

Wettable powders (WP)

It is the original drugs and fillers, wetting agents and dispersing agents after mechanical mixing of the powder formulations. The fine powder to be smaller ratio, wetting time is less than 2 minutes, suspension rate of greater than 60%. Wettable powder is mainly used for water spraying, dusting can not be used directly in the water back pack sprayers spraying, the active ingredient is not dissolved in water, but suspended in the water, and this is a key distinction between the soluble powder. Many on tobacco use fungicides and some insecticides are processed into a wettable powder is used, it has the advantage of relatively fine spray droplets, on the plant surface, strong adhesion, when spraying affected by wind little control effect is better than the same pesticide powder, Vinca longer. The kinds of formulations in fungicides accounted for a higher proportion of its efficacy generally do not have good EC, the current tobacco use on the most wettable powder pesticide formulations. Removal of the rainy season, the rest time can be the use of such agents. So class pharmaceutical diluted easy precipitation, thus resulting in injury, the best choice when preparing pharmaceutical secondary dilution method.

Soluble powder (WS)

Can be directly dissolved in water using powdered pesticide formulations, generally known as water-soluble powder on pesticides. WP like the appearance of the formulation, and the active ingredient content is usually higher than wettable powders, generally up to 60% - 90%. With insecticides, both active ingredients are the same, the efficacy of soluble powder than wettable powder. Compared with the EC, efficacy is similar, but without the use of organic solvents, reduce product costs,garden hand sprayers reduce environmental pollution, while highlighting the advantages of such agents, but in China is still in the development application stage.