PROBLEM TO BE SOLVED: To provide a novel pest control agent that shows excellent pest control activity (particularly insecticidal or acaricidal activity), and almost has no harmful effect on non-target organisms such as mammals, fish and useful insects, the pest control agent having low toxicity and low residual properties.SOLUTION: The present invention provides a pyrazolo[1,5-a]pyrimidine compound represented by formula (1), and a pest control agent containing the compound as an active ingredient. [R1 is C1-C6 alkyl or the like R3 is halo (C1-C6) alkyl or the like D is an imidazo[1,2-a]pyridine ring, optionally substituted with a halogen atom and the like, or the like n is an integer of 0-2].SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】優れた有害生物防除活性(特に殺虫・殺ダニ活性)を示し、哺乳動物、魚類及び益虫等の非標的生物に対しては殆ど悪影響を示さない、低毒性かつ低残留性の新規有害生物防除剤の提供。【解決手段】下式(1)で表されるピラゾロ[1,5-a]ピリミジン系化合物、及び前記化合物を有効成分として含有する有害生物防除剤。[R1はC1~C6アルキル等;R3はハロ(C1~C6)アルキル等;Dはハロゲン原子等で置換/非置換のイミダゾ[1,2-a]ピリジン環等;nは0~2の整数]【選択図】なし
