PROBLEM TO BE SOLVED: To provide an agrichemical potentiator composition which improves the wetting property (ease of wetting and spreading) of the agrichemical and can effectively increase the efficacy of agrichemicals.SOLUTION: The agrichemical potentiator composition includes: one or more compounds (A) selected from among a specific ethoxylate compound, a specific polyoxyethylene fatty acid ester, a specific polyoxyethylene sorbitan fatty acid ester, a specific (poly)glycerol fatty acid ester and a specific alkyl saccharide and a compound (B) represented by the following general formula (B1): R1bO-[(PO)m/(EO)n]-R2b, wherein R1b represents a 6-12C linear or branched alkyl group or the like, PO represents a propyleneoxy group, EO represents an ethyleneoxy group, m represents a number of 1-25 n represents a number of 0-4, and R2b represents a hydrogen atom or a methyl group and "/" means that the arrangement of PO and EO may be random or block.COPYRIGHT: (C)2012,JPO&INPIT【課題】農薬の湿展性(濡れ広がりやすさ)を向上させ、農薬の効力を効果的に増強できる農薬用効力増強剤組成物を提供する。【解決手段】特定のエトキシレート型化合物、特定のポリオキシエチレン脂肪酸エステル、特定のポリオキシエチレンソルビタン脂肪酸エステル、特定の(ポリ)グリセリン脂肪酸エステル、及び特定のアルキルサッカライドから選ばれる一種以上の化合物(A)、及び下記一般式(2)で示される化合物(B)を含有する農薬用効力増強剤組成物。R1bO-[(PO)m/(EO)n]-R2b (B1)(式中、R1bは炭素数6~12の直鎖又は分岐鎖のアルキル基等、POはプロピレンオキシ基、EOはエチレンオキシ基、mは1~25の数、nは0~4の数、R1bは水素原子又はメチル基を示す。“/”はPOとEOの配列がランダムでもブロックでもよいことを意味する。)【選択図】なし
