水稻白背飞虱灯诱种群数量动态研究

Research on Dynamic of Light Trapped Rice Sogota furcifera's Population

从贵州省思南县1990～2009年白背飞虱灯诱数据可以看出,该地区白背飞虱各年的始见期集中在4月中、下旬,高峰期多出现在7、8月份,年种群消长动态以单峰型和双峰型混合出现,但以单峰型为主导,达85%。运用灯诱白背飞虱数量季节性消长及年度间虫量的变化特点来分析其发生动态,可见总体虫害以20世纪90年代中后期发生较轻,进入21世纪呈现出加重发生趋势。

According to the data of light trapped Sogota furcifera in Sinan county from 1990 to 2009,the beginning occurrence stage of Sogota furcifera was concentrated in the mid.and late April;while the peak season often appeared in July and August.The annual dynamic trend was mixed bimodal and unimodal pattern;but unimodel was the dominant mode and contributed to 85%.If using the seasonal and year prevalence of light trapped Sogota furcifera to analysis the dynamic characteristics,the pest occurred lighter in 1990s and had been more and more serious since the beginning of 21st century.