小麦蚜虫混合种群数量动态研究

通过对麦蚜混合种群的系统调查,从种群生态学的角度出发,采用累加百分数及建立逻辑斯蒂数学模型等方法对小麦蚜虫的混合种群增长模型进行了分析.结果表明:小麦蚜虫的混合种群始盛期在4月26日,高峰期在5月16日,盛末期为5月26日.与1983、1997、2000年的麦蚜混合种群数量动态进行比较分析,得出2006年麦蚜发生的新特点是:发生数量非常低,高峰提前,后期下降快,无再猖獗现象.该研究为小麦蚜虫的综合治理及麦田昆虫群落的研究提供了科学的理论依据.

Investigation on Quantitative Dynamics of the Mixed Wheat Aphis Population

With the cumulative percentage,building logistic model and other methods,and through a systematic investigation,the growth trends of the mixed population of wheat aphis was analyzed from the population biological aspect.The results showed that the beginning period of two growth was on 26th April,their peak period was on 16th May,and their late period was on 26th May.Compared with 1983,1997,and 2000,the quantitative dynamics of the mixed wheat aphis population had some features in this year.These features were that the Individual volume of occurring was fewer,the descendent velocity at the end was quicker,the first peak was earlier and these aphides had not the resurgence.In addition,this investigation provided the scientific theoretic bases for IPM to the wheat aphis and the other insects' population study of wheat field.