The invention discloses a
propamidine water dispersible granule (WDG) and a preparation method thereof. Prepared
propamidine water dispersible granules comprise the following raw materials in percentage by weight: 85-90 percent of
propamidine, 2.5-5 percent of dispersant, 2.5-5 percent of
humectant and 2.5-5 percent of disintegrating agent, and the total percentage of the raw materials is 100. The preparation method comprises the steps as follows: the raw materials in a formula, including the propamidine, the
humectant, the dispersant and the disintegrating agent, are uniformly mixed, crushed by an
airflow crushing
machine, and made into ultra-fine
wettable powder, then the ultra-fine
wettable powder is added with a certain amount of water, and made into granules via an
extrusion type granulator, the granules are dried by an
airflow drier, and screened and separated, as a result, the
water dispersible granules are obtained. According to the invention, the cost of
package and transport can be effectively reduced, the storage stability and the
shelf life of the WDG are increased, the safety and the performance of
environmental protection in links about the production and the utilization of the propamidine WDG are also improved, and the
plant botrytis cinerea pathogenic bacterium can be very efficiently prevented and treated.