【摘 要】
：
When the life table data was analyzed, survival rate of some stages of Diamondback moth (DBM), Plutella xylostella (L. ) in no - control filed are more than 1 d
【机 构】
：
Agronomy and Plant Protection College, Qingdao Agricultural University. Qingdao 266109, China
【出 处】
：
害虫天敌的大量繁殖与商品化国际研讨会
论文部分内容阅读
When the life table data was analyzed, survival rate of some stages of Diamondback moth (DBM), Plutella xylostella (L. ) in no - control filed are more than 1 deviant, in which the duration of each stages calculated by temperature during investigation. Therefore, new analyses methods have been proposed. Each stage numbers (Nis) of each survey data had been calculated by formulae at first: each stage number of metaphase Nim = (Nis. D) / Ti and each stage number of begin Nib = (Ti-1, Nim + Ti· N(i-1)m/ (Ti +Ti-1). The duration of each stage (Ti) was estimated by the temperature during each survey, not during the whole investigation. Then the begin number of each stage (i) had been accumulated for calculation of each stage survival rate. The rest methods were as same as original methods. It had been tested and compared with original method used 9 life tables data. Its meaning and problem had been discussed.
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