PROCESSO PARA A PREPARACAO DE COMPOSICOES HERBICIDAS QUE CONTEM PELO MENOS UM DERIVADO DE FENILPIRIDAZINA SUBSTITUIDO

Herbicidal agent containing at least one compound of the formula in which R1 and R2 independently of one another in each case represent the radicals hydroxyl, halogen, cyano, nitro, amino which can optionally be substituted by alkyl having 1 - 4 C atoms, straight-chain or branched alkyl which has 1 - 10 C atoms and which can optionally be monosubstituted or polysubstituted by hydroxyl, halogen or cyano, or are straight-chain or branched alkoxy having 1 - 10 C atoms, cycloalkyl having 5 - 7 C atoms, cycloalkoxy having 5 - 7 C atoms, phenyl, phenoxy, alkylthio or alkylsulphonyl having 1 - 4 C atoms, n and m independently of one another in each case represent the numbers 0, 1, 2 or 3, where n + m represent the numbers 1 to 5, R3 represents the radicals hydroxyl, halogen, -OC(O)ZR4 or -OC(O)NR4R5, where R4 represents a straight-chain or branched saturated or unsaturated alkyl radical which has 1 - 15 C atoms and which can optionally be substituted by a phenyl radical, or represents a phenyl radical or a cycloalkyl radical having 5 - 7 C atoms, R5 represents a straight-chain or branched saturated or unsaturated alkyl radical which has 1 - 15 C atoms and which can optionally be substituted by a phenyl radical, or represents a phenyl radical or a cycloalkyl radical having 5 - 7 C atoms, Z is a single bond, oxygen or sulphur and X is halogen, or their salts which are tolerated by plants.d