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在15,17,21,25,29,33,35℃七种恒温下测定了二化螟各虫期的发育历期,并据此推算其发育起点和有效积温。结果为:卵11.8℃和83.5日·度;1龄幼虫11.6℃和71.7日·度;2龄幼虫10.9℃和92.4日·度,3龄幼虫11.6℃和74.1日·度;4龄幼虫11.3℃和77.2日·度;5龄幼虫10.7℃和86.6日·度,6龄幼虫10.5℃和79.5日·度;全幼虫期9.8℃和567.6日·度;预蛹12.8℃和50.7日·度;蛹10.9℃和118.9日·度;成虫产卵前期14.6℃和30.1日·度;全世代(雌)10.7℃和811.5日·度;利用Weibull函数拟合二化螟种群内幼虫个体间发育历期分布,当常态历期为x时,完成发育个体占总个体的比例F(x)可以下式表达: F(x)=1-Exp{-[(x-0.6546)/0.3795]~(3.8526)}
The developmental stages of each stage of the stem borer, Chilo suppressalis, were determined at seven temperatures of 15, 17, 21, 25, 29, 33 and 35 ℃, and the starting point of development and effective accumulated temperature were calculated. The results were as follows: eggs 11.8 ° C and 83.5 days · degrees; 1st instar larvae 11.6 ° C and 71.7 days · degrees; 2nd instar larvae 10.9 ° C and 92.4 days · degrees, 3rd instar larva 11.6 ° C and 74.1 days · degrees; 4th instar larva 11.3 ° C And 77.2 days · degrees respectively; 5th instar larvae at 10.7 ℃ and 86.6 days · degrees, 6th instar larvae at 10.5 ° C and 79.5 days · degrees; whole larvae at 9.8 ° C and 567.6 days · degrees; pre-pupae at 12.8 ° C and 50.7 days · degrees; 10.9 ℃ and 118.9 days · degrees respectively; pre-oviposition stage of adult adults at 14.6 ℃ and 30.1 days · degrees; whole-generation (female) at 10.7 ℃ and 811.5 days · degree; and fitted the Weibull function to fit the distribution history of larvae within larvae , When the normal duration is x, the proportion F (x) of individuals completing the development to the total individuals can be expressed as follows: F (x) = 1-Exp {- [(x- 0.6546) /0.3795] (3.8526)}