HERBICIDAL BENZOXAZINONES

摘要

The present invention provides benzoxazinones of formula I wherein R1 is hydrogen or halogen; R2 is hydrogen, C1-C6-alkyl, C1-C6-haloalkyl, C3-C6-cycloalkyl, C3-C6-alkenyl, C3-C6-haloalkenyl, C3-C6-alkynyl, C3-C6-haloalkynyl, C1-C6-alkoxy or C3-C6-cycloalkyl-C1-C6-alkyl; R3 is halogen; R4 is halogen; X is O or S; and Y is a substituted or unsubstituted heterocycle; Benzoxazinones of formula I are useful as herbicides.