Clodinafop-propargyl aqueous emulsion and preparation method thereof

The invention relates to selective stem leave herbicide for wheat and a preparation method thereof, in particular to clodinafop-propargyl aqueous emulsion and a preparation method thereof. The clodinafop-propargyl aqueous emulsion comprises the following components in percentage by mass: 10 to 30 percent of clodinafop-propargyl, 5 to 17 percent of surfactant, 0.5 to 1 percent of PH regulator, 1 to 5 percent of antifreeze agent, 20 to 35 percent of organic solvent and the balance of water. The preparation method comprises the following steps of: dissolving the clodinafop-propargyl into the organic solvent, stirring the mixture mechanically until the solution is transparent, adding the surfactant, and stirring the mixture uniformly to prepare an oil phase; dissolving the PH regulator, a thickening agent, a defoaming agent and the antifreeze agent in the balance of water to prepare a water phase; and adding the water phase into the oil phase slowly, and simultaneously, performing shearing by using a high-shear e