【摘要】 采用人工接虫的方法，组建了自然变温条件下保护地瓜蚜实验种群平均生殖力表。在日平均温度２２ ．２２ ℃（１８ ．４２ ℃～２５ ．３８ ℃） 条件下，瓜蚜种群世代周期（Ｔ） 为１３ ．３７８ｄ，净出生率（Ｒ０） 为１５ ．０７５ ，周限增长率（λ）为１．２２５ ，瞬时增长率（ｒ）为０ ．２０３，种群加倍时间（ｔ） 为３ ．４１８ｄ。在１５ ℃～３０ ℃条件下，瓜蚜完成一代需１１．２０ｄ ～４．８６ｄ，发育起点温度为４ ．５２℃，有效积温为１２０．２３ 日度。更多还原

【Abstract】 The life tables were constructed for the experimental population of cucumber aphid,Aphis gossypii Glover,under natural fluctuating temperatures with the method of artificial inoculation.At mean daily temperature of 22.22℃(18.42～25.38℃),the mean generation time(T),net reproductive rate(R 0),finite increase rate(λ),instantaneous increase rate(r),and population double time(t) were 13.378,15.075,1.225,0.203 and 3.418 ,respectively,On the range of 15～30℃,A.Gossypii completed one generation in 11.20～4.86 days.Its developmental threshold was 4.52℃ and its effective accumulative temperature was 120.23d℃.更多还原