Pyridazinone derivatives, preparation thereof, and agricultural and horticultural fungicidal, insecticidal, acaricidal, nematicidal compositions containing said derivatives.

摘要

Novel 5-substituted -3(2H)-pyridazinone derivatives and preparation thereof are provided. The derivatives have the formula: (I) wherein, R denotes an alkyl, R1 and R2 denote each independently hydrogen or a lower alkyl, X denotes hydrogen, a lower alkyl, a halogen, a lower alkoxy, a lower haloalkyl, a lower haloalkoxy, a cycloalkyl, trimethylsilyl (-Si(CH3)3), (wherein Y denotes hydrogen, a halogen, a lower alkyl, a lower alkoxy, a lower haloalkyl, a lower haloalkoxy or a cycloalkyl, and m is an integer of 1 to 5), n is an integer of 1 to 5, and Z denotes a halogen; said X being the same or different when n is 2 or more, and the alkyls and the alkyl moieties contained in the groups being straight or branched.