LC50
例句释义:1.The certain concentrations of fipronil approaching the LC50 can negatively affect population parameters of Daphnia pulex.氟虫腈在水中的质量浓度达到LC50时对大型蚤的种群有影响。
2.The LC50 of 3 pesticides determined by leaf-dip+spray bioassay were lower than the other methods.其中，叶浸+喷雾法测得的3种杀虫剂的LC50均比其余两种方法测得的低。
3.Methods The median lethal concentration (LC50) for Cx. pipiens pallens larvae was determined by the impregnation method;方法采用浸渍法测定淡色库蚊幼虫半数致死浓度（LC50）；