From a farmland which used organophosphate pesticide omethoate as insecticide frequently , we gathered soil in spring , summer , autumn and winter , from the collection soil , isoloated the aerobic bacteria that can degradate organohosphate pesticide omethoate 从常施用有机磷农药氧乐果为杀虫剂的农田生态系统中,在春、夏、秋、冬四季中各采集土壤,从采集到的土样中分离出能够降解有机磷农药氧乐果的好氧细菌。