桉树枝瘿姬小蜂空间分布格局  

Spatial Distribution Pattern of Leptocybe invasa Fisher et La Salle

作　　者：吴耀军[1] 常明山[1] 李德伟[1] 黄华艳[1] 邹东霞[1] 

机构地区：[1]广西林业科学研究院国家林业局中南速生材繁育实验室广西优良用材林资源培育重点实验室,南宁530002

出　　处：《广西林业科学》2013年第4期300-303,共4页Guangxi Forestry Science

基　　金：广西林业科技项目(桂林科字〔2009〕3号);广西优良用材林资源培育重点实验室自主课题(12B0403)

摘　　要：桉树枝瘿姬小蜂(Leptocybe invasa Fisher&La Salle)是近年来发现的一种重要的检疫性有害生物。为了研究该虫在桉树林内的空间分布格局,2011年6月在广西北海对桉树无性系DH201-2上的虫瘿和成虫进行了详细的调查研究,应用扩散系数等7种指标对其空间分布进行了测定。结果表明:该虫在桉树林中分布格局为聚集分布,叶脉、叶柄、茎上的虫瘿和成虫的聚集原因是依靠环境因素决定的,柄脉上虫瘿的聚集主要是其本身的聚集习性和环境因素共同作用引起。在此基础上,建立该虫林间理论抽样数公式,给出了不同虫口密度以及不同误差要求的最适抽样数。Leptocybe invasa Fisher ＆ La Salle was one of main quarantine pests. In order to study the spa- tial distribution pattern of the pest in Eucalyptus forests, galls and adults in Eucalyptus clone DH201-2 were investigated detailedly in Beihai of Guangxi in June 2011. Seven indices such as diffusion coefficient were applied to test the spatial distribution. The results showed that the spatial distribution pattern was assembly distribution. The aggregation of galls and adults in leaf vein, petiole, and stem was caused by environment. The aggregation of galls in leaf vein-petiole was caused by behavior and environment. Based on this distribution pattern, the optimum theoretical sampling numbers according to different population densities and errors were gave.

关 键 词：桉树枝瘿姬小蜂 虫瘿 成虫 空间分布格局 

分 类 号：S763.3[农业科学—森林保护学]