PROBLEM TO BE SOLVED: To provide an effect enhancer for amino acid-based agrochemicals that has excellent compatibility when mixed with amino acid-based agrochemicals, can improve the compounding stability of agrochemical compositions, and can effectively enhance the effect of amino acid-based agrochemicals.SOLUTION: An effect enhancer composition for amino acid-based agrochemicals comprises three specific quaternary ammonium salts having ester groups and a specific fatty acid at a specific mass ratio.SELECTED DRAWING: None【課題】アミノ酸系農薬と混合した時の相溶性に優れ、農薬組成物の配合安定性を向上でき、アミノ酸系農薬の効力を効果的に増強できるアミノ酸系農薬用効力増強剤を提供する。【解決手段】エステル基を有する３種の特定の第４級アンモニウム塩と特定の脂肪酸とを、特定の質量比で含有するアミノ酸系農薬用効力増強剤組成物。【選択図】なし
