well as derivative terms such as u201c arylalkyl u201d as used herein include within their scope straight chain branched chain and cyclic moieties unless specifically stated otherwise each may be unsubstituted or substituted with one or more substituents selected from but not limited to halogen hydroxy alkoxy or alkylthio provided that the substituents are sterically compatible and the rules of chemical bonding and strain energy are satisfied the term u201c aryl u201d refers to a phenyl indanyl or naphthyl group the aryl group may be unsubstituted or substituted with one or more substituents selected from halogen hydroxy c 1 c 6 alkyl or c 1 c 6 alkoxy provided that the substituents are sterically compatible and the rules of chemical bonding and strain energy are satisfied the term u201c arylalkyl u201d refers to c 1 c 4 alkyl groups substituted with an aryl group herbicidal carboxylic acids mean those herbicides containing a carboxylic acid group and includes benzoic acid herbicides such as chloramben dicamba 2 3 6 tba and tricamba organophosphorus herbicides such as glufosinate and glyphosate pyrimidinyloxybenzoic acid herbicides such as bispyribac and pyriminobac phthalic acid herbicides such as chlorthal pyridine carboxylic acid herbicides such as aminopyralid clopyralid fluoroxypyr picloram and triclopyr quinolinecarboxylic acid herbicides such as quinclorac and quinmerac phenoxyacetic herbicides such as 4 cpa 2 4 d.