METHOD OF PREPARING INSECTICIDE CYPERMETHRIN-BASE COMPOSITION Russian patent published in 1997 - IPC

FIELD: agriculture, plant protection. SUBSTANCE: vehicle (aerosil) is heated preliminary to 35-40 C, stirred under residual pressure 0.068-0.072 MPa and impregnated with cypromethrin by spraying the melted cypermethrin as aerosol at stirring for 18-22 min. Charge and mixing the rest components were carried out for three stages: firstly, 1/3 urea is charged with surface-active substance (sulfanol), then - 1/3 urea with sulfate-yeast mash concentrate or lignosulfonate, then the last 1/3 urea is charged, mixed and mixture is stirred after each portion charge for 5-7 min. The ready mixture is milled to particle size 25-50 mcm. Composition is used for plant pests control. EFFECT: improved method of preparing. 1 tbl, 1 dwg