基于有虫株率与幼虫密度关系的玉米苗期草地贪夜蛾发生程度分级研究  

Grading for Spodoptera frugiperda (Smith) occurrence degree with the indices of ratio of plants with larva and larval density at corn seedling stage

作　　者：何沐阳 李建芳 任璐 张富春 宁冬冬 王磊[1] 陆永跃[1] HE Mu-Yang;LI Jian-Fang;REN Lu;ZHANG Fu-Chun;NING Dong-Dong;WANG Lei;LU Yong-Yue(College of Agriculture,South China Agricultural University,Guangzhou 510642,China)

机构地区：[1]华南农业大学农学院

出　　处：《环境昆虫学报》2019年第4期748-753,共6页Journal of Environmental Entomology

基　　金：广东省外来入侵物种风险评估和监测预警共性关键技术研发创新团队建设项目(2019KJ134);广东省农业科技创新及推广项目(2018LM2161)

摘　　要：调查获得了玉米苗期草地贪夜蛾Spodoptera frugiperda(Smith)有虫株率和幼虫密度数据,建立了两者指数函数模型:Y=1.1518X1.1694,提出了玉米苗期以有虫株率和幼虫密度为指标的草地贪夜蛾发生程度分级标准。研究结果可为进行草地贪夜蛾田间虫情调查、分级提供参考。The data of rate of plant with larva and larva density of Spodoptera frugiperda(Smith) at corn seedling stage were investigated and obtained. The exponential function model of those two parameters was established as Y = 1.1518 X1.1694. The standard for occurrence degree of S. frugiperda at corn seedling stage was put forward, which was based on the rate of plant with larva and larva density. The results can provide a reference for field investigation and classification of S. frugiperda.

关 键 词：草地贪夜蛾 玉米苗期 有虫株率 幼虫密度 

分 类 号：Q968.1[生物学—昆虫学] S433.4[农业科学—农业昆虫与害虫防治]