“两查两定”,即查病虫发生时间,定防治适期,查病虫发生数量或发病程度,定防治对象田。开展“两查两定”实现合理用药,经济效大地防治病虫害,并与其他防治措施有机地配合,是贯彻“预防为主、综合防治”方针的重要关键。近年来各地开展了“两查两定”防治工作,取得了良好效果。为全面推广“两查两定”药治病虫,提高防 “Two check two set”, that check the time of occurrence of pests and diseases, set the appropriate period of prevention and control, check the number of pests and diseases or the incidence, will be the object of prevention and control. It is an important key to implementing the principle of “prevention first and integrated prevention and treatment” to carry out “two checks and two determinations” to achieve rational drug use and prevent and control pests and diseases economically and to cooperate organically with other prevention and control measures. In recent years, various localities have conducted “two checks and two regulations” prevention and control work and achieved good results. In order to comprehensively promote the “two check two set” medicine pest control, improve prevention