PROBLEM TO BE SOLVED: To provide a liquid agrochemical in which the plant disease control activity of a pyridazine compound represented by the following formula (I) is enhanced.SOLUTION: A liquid agrochemical comprises a pyridazine compound represented by the following formula (I) [where each symbol represents a definition described in the specifications], an amide compound represented by the following formula (II): Ra-CO-NRbRc [where each symbol represents a definition described in the specifications], and a surfactant.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】下記式(I)で示されるピリダジン化合物の植物病害防除活性が増強された液状農薬を提供すること。【解決手段】下記式(I)〔式中、各記号は明細書中に記載の定義を表す。〕で示されるピリダジン化合物と下記式(II)Ra-CO-NRbRc (II)〔式中、各記号は明細書中に記載の定義を表す。〕で示されるアミド化合物と界面活性剤とを含有する液状農薬。【選択図】なし