%0 Journal Article
%T Influence of host age on the epizootic of nuclear polyhedrosis virus of Spodoptera litura<br>宿主虫龄对斜纹夜蛾核型多角体病毒病流行的影响
%A JIANG Jiexian
%A LIANG Guangwen
%A ZHENG Ling
%A <br>蒋杰贤
%A 梁广文
%A 曾玲
%J 应用生态学报
%D 2003
%I 
%X Through investigation of tracking infected Spodoptera litura larvae, a study was carried out to observe the epizootic dynamics of nuclear virus disease of S. litura after virus release in different instar with concentration of 2.15 x 10(7) PIBs.ml-1 in vegetable field. The results showed that with the age of S. litura increasing, the susceptibility to virus, mortality and death velocity decreased, the disease death sustained period of larvae obviously elongated, and the time that larval mortality and diseased prevalence began and peaked were postponed. The distribution of disease death time could be well simulated by Complementary log-log model (CLL). Hosmer-Lemoshow test showed that the theoretic values well fitted to observed data, and t-test indicated that the coefficients of the model reached significant level. The distribution of diseased prevalence of host larvae was simulated by Holliday model, the regression of function was significant by F-test, and its coefficients reached or approached significant level. Moreover, the cumulative diseased death time distribution could be described by S-type models (Gompertz, Logistic, Weibull), in which, the Gompertz model was the best.
%K Spodoptera litura
%K Larval instar
%K Nuclear polydedrosis virus
%K Disease epizootic
%K Distribution of disease time
%K Complementary log
%K log model<br>斜纹夜蛾
%K 幼虫龄期
%K 核型多角体病毒
%K 疾病流行学
%K 病死时间分布
%K 互补重对数模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=8D594C8CBB68AF4B&yid=D43C4A19B2EE3C0A&vid=F3583C8E78166B9E&iid=B31275AF3241DB2D&sid=2F26E27A20AEB31F&eid=808D6B9EB5A8B4B4&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=5&reference_num=6