GROUND-LEVEL TREATMENT AGENT FOR INHIBITING PLANT DISEASES CAUSED BY FILAMENTOUS FUNGI, METHOD FOR INHIBITING PLANT DISEASES CAUSED BY FILAMENTOUS FUNGI, GROUND-LEVEL TREATMENT AGENT FOR PROMOTING EXPRESSION OF LEAF SIGNAL TRANSDUCTION-RELATED GENES IN PLANTS, METHOD FOR PROMOTING EXPRESSION OF LEAF SIGNAL TRANSDUCTION-RELATED GENES IN PLANTS, GROUND-LEVEL TREATMENT AGENT FOR PROMOTING EXPRESSION OF TAPROOT SIGNAL TRANSDUCTION-RELATED GENES IN PLANTS, AND METHOD FOR PROMOTING EXPRESSION OF TAPRO

To provide a disease inhibitor or a signal transduction-related gene expression promoter that exhibits superior effects in controlling plant diseases or in promoting the expression of genes related to disease inhibition, featuring high safety, low phytotoxicity, and easy treatment such as spraying.SOLUTION: The present invention provides a ground-level treatment agent for inhibiting plant diseases caused by filamentous fungi, a ground-level treatment agent for promoting the expression of leaf signal transduction-related genes in plants, and a ground-level treatment agent for promoting the expression of taproot signal transduction-related genes in plants, each comprising acetic acid as an active ingredient.SELECTED DRAWING: None 【課題】 安全性が高く、薬害が少なく、散布等の処理がしやすい、優れた植物病害抑制効果又は植物の病害を抑制する関連遺伝子発現効果を示す、病害抑制剤又はシグナル伝達関連遺伝子発現促進剤を提供することを課題とする。【解決手段】 酢酸を有効成分として含有する地際部処理用植物糸状菌起因病害抑制剤、地際部処理用植物葉部シグナル伝達関連遺伝子発現促進剤、又は、地際部処理用植物主根部シグナル伝達関連遺伝子発現促進剤。【選択図】 なし