4-PHENYL-PYRANE-3,5-DIONES,4-PHENYL-THIOPYRANE-3,6-DIONES AND CYCLOHEXANETRIONES, PROCESSES FOR THE PREPARATION THEREOF, HERBICIDAL COMPOSITION BASED THEREON, METHOD OF CONTROLLING GRASSES AND WEEDS IN CROPS OF USEFUL PLANTS

摘要

Disclosed are pyrandione, thiopyrandione and cyclohexanetrione compounds of formula (I), processes for their preparation, methods for controlling grasses and weeds in crops of useful plants, or in inhibiting plant growth, a herbicidal composition which, in addition to formulation adjuvants, comprises a herbicidally effective amount of a compound of formula I.(I)