PROBLEM TO BE SOLVED: To provide a compound capable of being industrially advantageously synthesized, having a reliable effect, and capable of especially being safely used to bring the compound to be stably formulated, and a harmful organism-controlling agent containing the compound as an active ingredient.SOLUTION: There is provided a crystal composed of a single diastereomer of an isoxazoline compound represented by formula (I). [In the formula, X represents a halogen atom or the like n represents the number of substituent(s) of X X represents a halogen atom or the like m represents the number of substituent(s) of X R1 represents a 1-6C haloalkyl group R2 represents H or the like R3 represents H, a substituted or non-substituted 1-6C alkyl group or the like p represents a repeating number of the methylene group in the parenthesis and is an integer of 1 or 2].COPYRIGHT: (C)2012,JPO&INPIT【課題】工業的に有利に合成でき、効果が確実で、特に安全に使用でき、安定な製剤化が可能な化合物、これを有効成分とする有害生物防除剤の提供。【解決手段】式(I)で表されるイソオキサゾリン化合物の単一のジアステレオマーからなる結晶。(Xはハロゲン原子などを、nはXの置換数を、X’はハロゲン原子などを、mはX’の置換数を、R1はC1~6ハロアルキル基を、R2は水素原子などを、R3は水素原子、無置換のもしくは置換基を有するC1~6アルキル基などを示す。pは括弧内のメチレン基の繰返し数を示し且つ1または2のいずれかの整数である。)【選択図】なし
