Certain pyridyloxy or thrio-phenoxy-propanoic acids or salts thereof useful as herbicides

摘要

Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF3, CF2Cl or CF2H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.