期刊论文

Wen, L.

中文

生态学报

1000-0933

2011

31

11

2978-2989

农业部国家公益科研专项甜菜夜蛾行业项目（200803007）；

本校为第一且通讯机构

应用时间序列分析技术研究了我国甜菜夜蛾间歇性暴发的时间序列波动规律。结果表明,在1949-2008年的60a中,我国甜菜夜蛾大尺度暴发总年频次为120次,各年度暴发次数(年频次)存在着非均衡性循环波动特征,并且在其波动过程中呈明显的上升趋势。按“年频次”强度,可将我国1949-2008年60a中甜菜夜蛾发生过程,划分成两个明显不同的阶段。第一阶段(1949-1984年)为平稳低发阶段,36a总年频次量为4次,年平均仅0.11次；第二阶段(1985-2008年)则为波浪式上升性高发阶段,24a总年频次为116次,年平均4.83次(为第一阶段的43.91倍))。按第二阶段24a(1985-2008年)数据进行自相关系数和频谱图分析,结果表明,我国甜菜...

Spodoptera (Laphygma) exigua Hübner is a worldwide insect pest, whose populations often explode intermittently causing disaster in China. Especially in the last 20 years, S. exigua outbreaks in China have been constantly expanding in their scope and quantity of occurrence, and the economic damage caused to agriculture has also been intensifying unceasingly. Although our predecessors, through broad and thorough research, have developed a relatively profound understanding of the pest development laws, as well as the reasons for the S. exigua out...