小麦田麦蚜种群数量变动机制

摘要

Population dynamic variation mechanism of wheat aphid was elaborated from the aspects of internal cause (intraspecific competition, interspecific competition),external cause (biological factor,nonbiological factor and soil factor) and synergistic effect of various factors.The over-all trend of population variation was pointed out .%从内因（种内竞争、种间竞争）、外因（生物因素、非生物因素和土壤因子）及各因子协同作用等方面阐述了麦蚜种群数量的变动机制，并指出了麦蚜种群变动的总趋势。