摘要
为评价温度对锈赤扁谷盗的长生发育与种群变动的影响,测定比较了不同温度条件下锈赤扁谷盗发育历期及子代种群数量的差异,并在温度30℃、相对湿度70%条件下组建了锈赤扁谷盗实验种群生命表。结果表明:温度对锈赤扁谷盗发育历期及子代种群数量有显著的影响。18℃时,锈赤扁谷盗发育历期最长,可达94.76d;34℃时,发育历期最短,只有25.7d。锈赤扁谷盗从卵到成虫的发育起点温度为17.28℃,有效积温为53.93日度。30℃时最为适宜锈赤扁谷盗成虫产卵,其单雌子代种群数量最大,达到8.4头;当温度达到38℃时,锈赤扁谷盗成虫已经无法正常产卵。由此建立锈赤扁谷盗发育历期(y)与温度(x)关系模型y=418.25e-0.085x和锈赤扁谷盗子代种群数量(y)与温度(x)的关系模型y=0.00695x2+3.9133x-47.916。实验种群趋势指数(I)为22.238,说明锈赤扁谷盗下代种群数量为上代数量的22.238倍。
To evaluate the effects of the temperature on the growth and population dynamics of Cryptolestes ferrugineus, the paper compared the development time and the number of population under different temperature conditions, and buil the experimental population life table at 30℃ and the relative humidity of 70% . The results showed that： the temperature has significant effect on the development time and the number of population of C. ferrugineus; The whole generation developmental threshold temperature is 17.28℃, and the accumulated temperature is 53.93daytemperature. 30℃ is suitable for C. ferrugineus production, with biggest progeny population, up to 8.4;when the temperature reaches 38 ℃, C. ferrugineus couldn＇ t spawn normaly. The relationship equation of the number of population and the temperature： Y= -0.6949T2 ＋39. 144T-479.34 had been establelished. The experimental population trend index is 22. 238.
出处
《粮食储藏》
2015年第1期1-5,共5页
Grain Storage
基金
粮食公益性行业科研专项"储粮虫霉监测与生态控制技术研究"中研究任务"高温高湿储粮区扁谷盗类害虫种群生态控制关键技术研究与示范"(201313002-04)
关键词
锈赤扁谷盗
发育历期
有效积温
生命表
Cryptolestes ferrugineus, development time, accumulated temperature life table
