3-PHENOXY-4-PYRIDAZINOL DERIVATIVE AND HERBICIDE COMPOSITION CONTAINING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a herbicidal compound which hardly exhibits chemical injury against paddy rice and exhibits excellent herbicidal activities at low doses against a wide range of weed species in paddy fields. SOLUTION: This herbicidal compound exhibiting the excellent herbicidal activities at low doses is a compound represented by formula (1), its salt or its ester derivative, wherein R1is H, a halogen atom, an alkyl, or the like; R2is H, a halogen, an alkyl, or the like; R3, R4, R5, R6and R7are each independently H, a halogen, a substitutable alkyl, a substitutable alkenyl, an alkynyl, a substitutable cycloalkyl or the like; or the adjacent two of R3, R4, R5, R6and R7may form a substituted or non-substituted ring together with the carbon atom bound to thereto; (m) and (n) are each independently 0 or 1. COPYRIGHT: (C)2004,JPO