向日葵螟幼虫的空间分布型及抽样技术
Spatial distribution pattern and sampling technique of the larvae of European sunflower moth, Homoeosoma nebulellum
张总泽1, 2,刘双平3, 张 静3 ,罗礼智1** , 江幸福1
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作者单位：1.中国农业科学院植物保护研究所 植物病虫害生物学国家重点实验室 北京 100193；
中文关键词：
英文关键词：
中文摘要： 欧洲向日葵螟Homoeosoma nebulellum Denis et Schiffermüller是向日葵上的主要害虫，本文利用6种聚集指标对向日葵螟幼虫的空间分布型进行了测定，结果表明其呈现聚集分布。样本平均数（m）与方差（S2）的对数值的关系式为：lgS2=lg0.2130+0.5639lgm，显示向日葵螟幼虫的空间分布随密度的升高而趋向均匀分布。Iwao的m*-m回归方程为：m*=8.1177+0.1447m，显示该虫在田间分布的基本成分是个体群，个体间相互吸引，个体群的空间分布型为均匀分布。对聚集原因进行分析，得出λ<2，表明向日葵螟幼虫的聚集是由于环境作用所引起的。用Iwao的理论抽样数模型计算出向日葵螟幼虫的理论抽样数模型为：D=0.1时，n=911.77/m-85.53，D=0.2时，n=227.94/m-21.38。采用m*-m关系的序贯抽样模型制定出食葵田间的序贯抽样模型为：T1(n),T0(n)=7.40n±4.54n，油葵田间的序贯抽样模型为：T1(n),T0(n)=10.05n±2.29n。
关键词 向日葵，向日葵螟，欧洲向日葵螟，美洲向日葵螟，空间分布型，抽样技术
* 资助项目：中国农科院院所基本科研专项（2008YW16）。
** 通讯作者, E-mail:lzluo@ippcaas.cn
英文摘要： The European sunflower moth, Homoeosoma nebulellum Denis et Schiffermüller is a serious pest of sunflower crops. Six aggregation indexes were used to identify the spatial distribution pattern of H. nebulellum larvae. The results show that this pest has an aggregated distribution pattern. The formula of the logarithm of the mean (m) and variance (S2) was:lgS2=lg0.2130+0.5639lgm, which meant that the distribution pattern of the larvae became progressively more even with increasing density. According to Iwao’s regression:m*=8.1177+0.1447m, the basic element of distribution was an individual colony in the field, individuals attract each other and individual colonies are evenly distribution. The aggregation mean λ (λ<2) indicated that the cause for the aggregated distribution was the environment. A theoretical sampling formula for the larvae of H. nebulellum was established as followed. n=911.77/m-85.53 (D=0.1) and n=227.94/m-21.38 (D=0.2). The sequential sampling formula were T1(n),T0(n)=7.40n±4.54 n (Confection sunflower) and T1(n),T0(n)=10.05n±2.29 n (Oil sunflower).
Key words sunflower, sunflower moth, Homoeosoma nebulellum, Homoeosoma electellum, spatial distribution pattern, sampling technique