PROBLEM TO BE SOLVED: To provide a composition for insecticides, mitecides, nematocides, molluscicide, germicides, or bacteriocides and a method of controlling pests.SOLUTION: The composition for insecticides, mitecides, nematocides, molluscicide, germicides, or bactreiacides includes one or not less than two kinds selected from among substituted isoxazoline compounds expressed by formula (1) (wherein, Arepresents C-Y or a nitrogen atom; Aand Arepresent C-H or the like; Arepresents C-H or a nitrogen atom; G represents a benzene ring or the like; L represents -CH(R)- or the like; X represents a halogen atom, trifluoromethyl or the like; Rrepresents -C(O)R, -C(O)NHRor the like; Rrepresents hydrogen atom, methyl, ethyl, cyclopropylmethyl, methoxymethyl, ethoxymethyl, cyanomethyl, allyl, propargyl or the like; Rrepresents trifluoromethyl, chlorodifluoromethyl or the like; m represents an integer of 0-5) and their salts and one or not less than two kinds selected from among known effective ingredients having a pest control activity.【課題】 新規な殺虫、殺ダニ、殺線虫、殺軟体動物、殺菌又は殺バクテリア剤組成物及び病害虫の防除方法を提供する。【解決手段】 式(1):【化1】[式中、A1はC-Y又は窒素原子を表し、A2及びA3はC-H等を表し、A4はC-H又は窒素原子を表し、Gはベンゼン環等を表し、Lは-CH(R4)-等を表し、Xはハロゲン原子、トリフルオロメチル等を表し、R1は-C(O)R1a、-C(O)NHR1c等を表し、R2は水素原子、メチル、エチル、シクロプロピルメチル、メトキシメチル、エトキシメチル、シアノメチル、アリル、プロパルギル等を表し、R3はトリフルオロメチル、クロロジフルオロメチル等を表し、mは0~5の整数を表す。]で表される置換イソキサゾリン化合物及びその塩より選ばれる1種又は2種以上と、公知の有害生物防除活性を有する有効成分より選ばれる1種又は2種以上を含有する殺虫、殺ダニ、殺線虫、殺軟体動物、殺菌又は殺バクテリア剤組成物。【選択図】 なし