SYNERGISTIC HERBICIDAL COMPOSITIONS

Herbicidal compositions containing as active substance A) phosphinotricine or a derivative thereof of the formula , in which R denotes H, R' denotes H and n is zero or R denotes H, R' denotes H, Y denotes C1 and n is 1, or R denotes H, R' denotes C1-C4alkyl.and n is zero o.r R denotes NH4, R' denotes H and n is zero or R denotes Na or K, R' denotes H, Na or K and n is zero, in combination with at least one of the following components: B) a hormone weed killer of the group of phenoxy-alkanecarboxylic acids of the formula in which R denotes H and R' denotes 2,4,5-trichloro or R denotes CH3 and R' denotes 2,4-dichloro; C) a phenylurea derivative of the formula in which R denotes CH3 and R' denotes 4-chloro or R denotes CH3 and R' denotes 3,4-dihydro or R denotes OCH3 and R' denotes 4-chloro; and D) a s-triazine derivative of the formula in which R denotes C1, R' denotes i-C3H7 and R" denotes C2H5 or R denotes C1, R' denotes C2H5 and R" denotes C2H5 or R denotes C1, R' denotes C2H5 and R" denotes t-C4H9 or R denotes SCH3, R' denotes C2H5 and R" denotes i-C3H7 or R denotes SCH3, R' denotes i-C3H7 and R" denotes i-C3H7 or R denotes OCH3, R' denotes C2H5 and R" denotes t-C4H9; the active substances A) and at least one of B), C) and D) being present in synergistic proportions.