abstract |
A novel herbicide exhibiting significant herbicidal activity against undesirable plants is provided. General formula (I): (wherein, X is -O-, -S-, -SO-, -SO 2 - or -N(Y)-; Q is monocyclic aryl optionally substituted with Z, monocyclic hetero aryl, etc.; Y is a hydrogen atom or alkyl; Z is halogen, alkyl, etc.; R 1 is alkyl, alkenyl, etc.; R 2 is a hydrogen atom, alkyl, etc.; R 3 is halogen, hydroxy, etc.; R 4 is a hydrogen atom , alkyl, etc.; n is an integer of 0 to 4) a pyridazinone-based compound or a salt thereof. |