[目的]研究四川省西部水稻螟虫组成及发生危害特点.[方法]于2007～2009年对四川西部稻区螟虫的组成及危害进行了系统调查.[结果]川西稻区螟虫由二化螟、三化螟和大螟组成.二化螟在川西绝大部分稻区都是优势危害种群;三化螟主要在龙泉和青白江及部分稻区有分布为害,表现出扩散加重趋势;大螟数量很少,但在水稻生长后期危害较重.[结论]研究结果为川西稻区水稻螟虫的有效防控措施的提出莫定了理论基础.%[ Objective ] The paper was to study the composition of rice stem borers in western Sichuan Province and the characteristics of their occurrence and damage. [ Method] Rice stem borers in western Sichuan rice region was composed of Chilo suppressalis, Tryporyza incertulas and Sesamia inferens. C. suppressalis was the dominant population in most rice regions in western Sichuan Province. T. yporyzu incertulas had distribution and damage in longquan, Qingbaijiang and some rice regions, showing increasing trend of spread. The population of S. inferens was the minimum, but it caused serious damage in later period of rice. [ Conclusion] The result provide theoretical basis for proposing effective control measures against rice stem borers in western Sichuan rice region.
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