HERBICIDE COMPOSITION AND METHOD FOR ENHANCING CHEMICAL STABILITY OF CHLORSULFURON IN HERBICIDE WETTING POWDER Russian patent published in 2005 - IPC

FIELD: agriculture, herbicides.

SUBSTANCE: invention relates to herbicide composition based on derivative of sulfonylurea that comprises non-ionogenic surface-active substance, lignosulfonates as anion-active surface-active substance and highly dispersed amorphous silica as a carrier. Composition comprises chlorsulfuron as derivative of sulfonylurea and triethanolamine or diethanolamine additionally, and potassium dihydrogen phosphate as a stabilizing agent in the following ratio of components, wt.-%: chlorsulfuron, 18-22; non-ionogenic surface-active substance, 3-5; potassium dihydrogen phosphate, 9-12; triethanolamine or diethanolamine, 9-11; lignosulfonates, 3-10, and highly dispersed amorphous silica, the balance. Method involves mixing components in indicated ratios by steps for 3 stages. At the 1-st stage triethanolamine or diethanolamine is applied on surface of highly dispersed amorphous silica, at the 2-d stage - chlorsulfuron, and at 3-d stage - potassium dihydrogen phosphate, lignosulfonates and non-ionogenic surface-active substance. After keeping for 24 h at the room temperature mixing products from all three stages are combined. Invention provides enhancing stability of chlorsulfuron and biological activity of preparation based on thereof. Invention is designated for applying in agriculture.

EFFECT: valuable properties of herbicide composition.

4 cl, 2 tbl, 9 ex