Picolinic acid derivatives and herbicidal compositions

摘要: Abstract of EP0567133A picolinic acid derivative the formula: wherein each R and is an alkoxy group, X a group formula hydrogen atom, alkyl haloalkyl alkoxyalkyl alkenyl alkynyl alkylcarbonyl benzyloxycarbonyl or phenylsulfonyl defined as in description benzyl alkali metal alkaline earth atom organic amine cation; salt thereof, amino alkylamino dialkylamino W COOR , COSR phenyl (which may be substituted by halogen methyl group), benzyloxyalkyl alkylideneamino cycloalkylideneamino which same different, alkylsulfonyl benzyloxy form together with adjacent nitrogen imidazolyl group; Y methylene cyano carbonyl Z A cation selected from consisting acyl anion conjugate base, herbicidal composition comprising herbicidally effective amount formulae (I) to (IV) thereof agricultural adjuvant.