Use of benzoxepin derivatives as a herbicide

A method of combating the proliferation of undesirable plants by contacting the undesirable plants with at least one compound chosen from the compounds of general formula (I)

• in which
• n is an integer greater than or equal to 0,
• X represents an atom chosen from O and S, or a divalent group chosen from —SO—, —SO2— and —NR′— with R′ being a hydrogen atom or a C1 to C5 alkyl or cycloalkyl radical, or aryl radical,
• R1, R2, R3 and R independently of one another represent a hydrogen or halogen atom, a C1 to C5 alkyl or cycloalkyl radical or a group chosen from —OH, —COOH, —COOR″, —OR″ and —SO2R″, with R″ being a C1 to C5 alkyl or cycloalkyl radical, with alkyl or cycloalkyl radicals optionally substituted by one or more halogen atoms or hydroxyl groups,
• the symbol indicates a single bond or a double bond in position 2, 3 or 4 of the 7-membered fused heterocycle, with at least one double bond being present, and
• A represents a radical chosen from phenyl, naphthyl, furyl, thiophenyl, pyrrolyl, pyridinyl, indolyl, isoindolyl, benzofuryl, benzothiophenyl, quinolyl, isoquinolyl, imidazolyl, oxazolyl, thiazolyl, pyrimidyl, pyridazyl, pyrazyl, pyrazolyl, or triazolyl radicals, optionally substituted by one or more halogen atoms, by one or more groups chosen from —OH, —COOH, —COOR′″, —OR′″ and —SO2R′″, with R′″ being a C1 to C5 alkyl or cycloalkyl radical, or by one or more C1 to C5 alkyl or cycloalkyl radicals optionally substituted by one or more halogen atoms or hydroxyl groups,
• and organic or inorganic salts thereof and isomers thereof.