PROBLEM TO BE SOLVED: To provide a novel pesticide mixture exhibiting wide range activities for inhibiting or controlling resistant strain to an active component or a mixture of known active components and synergetic effects as an antimicrobial agent or an insecticide.SOLUTION: There is provided a composition containing at least (a) a pyridyl ethyl benzamide derivative represented by the formula (I) and (b) an insecticidal compound such as fipronyl, clothianidin, pymetrozine and cyromazine with weight ratio of (a)(b) of 1/1000 to 1000/1. In (I), p is an integer of 1 to 4, q is an integer of 1 to 5, substituents X are each independently halogen, alkyl or haloalkyl, and substituents Y are each independently halogen, alkyl, alkenyl, alkynyl, haloalkyl, amino, phenoxy, alkylthio, acyl, cyano, ester, benzyl, nitro, alkylsulfonyl, alkylsulfone or the like.SELECTED DRAWING: None【課題】活性成分又は既知活性成分の混合物に対する抵抗性株の成長阻害又は制御するために、広い範囲の活性を示し且つ殺菌剤又は殺虫剤としての相乗効果を示す新規殺有害生物剤混合物の提供。【解決手段】少なくとも、式(I)で表されるピリジルエチルベンズアミド誘導体(a)及び例えばフィプロニル、クロチアニジン、ピメトロジン、シロマジンなどの殺虫性化合物(b)を、1/1000~1000/1の(a)(b)の重量比で含んでいる組成物。[pは1~4の整数;qは1~5の整数;置換基Xは各々独立にハロゲン、アルキル又はハロアルキル;置換基Yは各々独立にハロゲン、アルキル、アルケニル、アルキニル、ハロアルキル、アミノ、フェノキシ、アルキルチオ、アシル、シアノ、エステル、ベンジル、ニトロ、アルキルスホニル、アルキルスルホン等]【選択図】なし