波尔多液是果树上应用时间最长、应用范围最广、药效最为稳定而且至今尚未产生抗药性的广谱性保护性杀菌剂。其有效成分是碱式硫酸铜。在生产中。一些果农常因配制或使用不当,使果树产生药害,需加以注意预防。 Bordeaux mixture is the most prolonged application of fruit trees, the widest range of applications, the most stable efficacy and has not yet produced resistance broad spectrum of protective fungicide. The active ingredient is basic copper sulfate. in · Production. Some fruit farmers often formulated or used improperly, so that fruit trees produce phytotoxicity, need to be pay attention to prevention.