PROBLEM TO BE SOLVED: To provide a pest control composition that has excellent control effect against pests.SOLUTION: There is provided a pest control composition containing a pyrazine compound represented by formula (I) below or a N-oxide compound thereof, and 1 or more kind ingredient selected from group a: insecticidal, acaricidal, nematicidal, molluscicidal agent, group b: fungicidal agent, group c: plant growth regulator, group d: safener, group e: microbial material, group f: synergist, group g repellent, insect pheromone agent. [A1 is N, CH etc R1 is a C2-C10 chain type hydrocarbon group having 1 or more halogen atoms, and the like R2 is a C1-C6 alkyl group which may have 1 or more halogen atoms, and the like R3 each independently represents a C1-C6 chain type hydrocarbon group optionally having a substituent such as an alkoxy group, and the like R6 each independently represents a C1-C6 alkyl group which may have 1 or more halogen atoms, and the like n and q are each independently 0, 1, 2 and q is an integer from 0 to 3.].SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】有害生物に対する優れた防除効力を有する有害生物防除組成物の提供。【解決手段】下式(I)で示されるピラジン化合物又はそのNオキシド化合物と、群a;殺虫・殺ダニ・殺センチュウ剤・殺軟体動物剤、群b;殺菌剤、群c;植物生長調整剤、群d;薬害軽減剤、群e;微生物資材、群f;共力剤、群g;忌避剤、昆虫フェロモン剤、より選ばれる1種以上の成分とを含有する有害生物防除組成物。[A1は、N、CH等;R1は、1以上のハロゲン原子を有するC2-C10鎖式炭化水素基等;R2は、1以上のハロゲン原子を有していてもよいC1-C6アルキル基等;R3は、各々独立して、アルコキシ基等の置換基を有していてもよいC1-C6鎖式炭化水素基等;R6は、各々独立して、1以上のハロゲン原子を有していてもよいC1-C6アルキル基等;n及びqは、夫々独立して0,1,2;qは、0~3の整数]【選択図】なし