广东省水稻螟虫种群结构及其主要影响因素

通过对广东省水稻螟虫种类、分布及发生情况的调查,结果表明,广东省水稻螟虫种群结构发生了一定的变化,三化螟在水稻稻区普遍发生,二化螟和台湾稻螟呈上升趋势,在部分稻区上升为优势种群,并对螟虫种群发生变化的原因进行了分析.

Analysis on population Structure and dynamics of Chilo suppressalis and Tryporyza incertulas in Guangdong

The investigation of occuration and distribution about Chilo suppressalis Walker and Tryporyza incertulas Walker in Guangdong Province indicated that the population structure of Chilo suppressalis Walker and Tryporyza incertulas Walker has been changed. Tryporyza incertulas Walker occurs commonly in Guangdong province. The increasing trend with populations of rice stemborer, Chilo suppressalis Walker and the Taiwan rice snout moth, Chilo auricilius Dudgeon, has observed which become the principal population in some area of rice plant. And analysis on the change of population structure was conducted.