3-Phenoxy-.alpha.-phenoxy-alkanecarboxylic acid derivatives of the formula ##STR1## Wherein Hal is a halogen atom, n is an integer from 1 to 3, R is an acid function and Z is hydrogen or C.sub.1 -C.sub.4 alkyl, are disclosed as possessing a surprising selective herbicidal activity. Methods are disclosed for combatting weeds in mono- and dicotyledonous cultures such as cereals, corn, rice, soya and cotton, which comprise applying to the locus to be protected from weeds a dosage of from 0.1 to 10.0 kilograms per hectare of the above compounds.
本发明公开了式为##STR1##的3-苯氧-.alpha.-苯氧-烷基
羧酸衍
生物,其中Hal是卤素原子,n是1至3的整数,R是酸性官能团,Z是氢或C.sub.1-C.sub.4烷基,并具有出乎意料的选择性除草活性。本发明还公开了用于在单子叶和双子叶栽培中对抗杂草的方法,例如小麦、玉米、稻米、大豆和棉花,该方法包括向要保护免受杂草的区域施加上述化合物的0.1至10.0千克/公顷的剂量。