水稻三化螟近年来在我县回升速度较快。给水稻生产造成严重威胁。几年来的研究表明，再度猖獗的主要原因是：（１）品种布局的调整，利于三化螟的发生；（２）种植新技术的推广，为再度猖獗提供条件；（３）常年冬季偏暖，气候条件适宜；（４）防治认识不足，造成三化螟危害逐年加重。据此提出农业防治、化学防治等防治对策。 Rice stem borer in recent years in my county picked up faster. Pose a serious threat to rice production. Several years of research have shown that the main reasons for the re-rampant are as follows: (1) The adjustment of variety layout is conducive to the occurrence of the three rice borers; (2) The promotion of new planting techniques to provide conditions for re-rampancy; (3) , Suitable climatic conditions; (4) prevention and control of lack of knowledge, resulting in the damage of the stem borer increased year by year. Based on this, prevention and cure measures such as agricultural control and chemical prevention and control are put forward.