泗洪县地处洪泽湖西岸，常年种植水稻面积５．３万hm２，以单季晚稻种植为主，特别是优质品种武育粳３号种植比例大，占８５％以上。水稻三化螟自１９９６年以来已连续６a大发生。其主害代第三代为害单季中晚稻，造成白穗，未防治的稻田一般减产８成以上。近６a来，笔者就三化? Sihong County is located in the west coast of Hongze Lake, perennial planting area of ​​53000 hm2 rice, mainly to single-season late rice planting, especially high-quality varieties Wuyujing 3 planting a large proportion, accounting for more than 85%. Rice borer has occurred continuously for 6 years since 1996. The main victims on behalf of the third generation of single crop damage in the late rice, resulting in white spike, unmanaged paddy fields generally cut more than 80%. Nearly 6 years, the author on the three?