HERBICIDAL COMPOSITIONS CONTAINING PYRIDO-ANELLATED 4-OXO-4H-BENZOPYRANS AS ACTIVE INGREDIENTS AND PROCESS FOR PREPARING THE ACTIVE INGREDIENTS

摘要

Pyrido-fused 4-oxo-4H-benzopyrans I I (m=0, 1 or 2; R1, R6 and R7 have the meanings stated in the description) and the salts of I, and herbicides which contain 2-(4-hetaryloxy)- and 2-(4-aryloxy)-phenoxyacetic acid derivatives or cyclohexenone derivatives as herbicidal active ingredients and pyrido-fused 4-oxo-4H-benzopyrans I' as antidotes.