油桐尺蠖越冬蛹在桉树林空间分布型及其生物学特性研究  

Spatial distribution pattern of overwintering pupae of Buzura suppressaria Guenée and its biological characteristics in eucalypt forest

作　　者：刘有莲[1] 黄寿昌[1] 牙璋 曹书阁[1] 庞正轰[1] 刘建敏 LIU Youlian, ct al.(Guangxi F.co-engineering Vocational ＆ Technical College,Liuzhou 545004 ,Chin)

机构地区：[1]广西生态工程职业技术学院,广西柳州545004 [2]广西沙塘林场,广西柳州545004 [3]崇左市林业勘测设计院,广西南宁530001

出　　处：《中国森林病虫》2018年第2期14-17,共4页Forest Pest and Disease

基　　金：桉树油桐尺蠖灾变监测与防治技术研究(广西林业厅林业科技项目;桂林科字[2013]第12号);广西优秀中青年骨干教师培养工程(广西教育厅;桂教人字[2013]第9号)

摘　　要：于2015年3—4月、11月,在油桐尺蠖Buzura suppressaria Guenée危害的桉树人工林,采取逐株、随机抽取样树的方法调查油桐尺蠖越冬蛹分布情况;采用5种聚集度指标法分析越冬蛹空间分布格局;室内人工饲养观察雌雄蛹形态、寄生蜂与成虫羽化、性比等生物学特性。结果表明:油桐尺蠖越冬蛹在桉树林主要分布在距树干基部半径0~60 cm、深度0~10 cm的土层,呈聚集分布,环境因素是聚集原因。雌蛹臀棘端部分叉,雄蛹臀棘端部不分叉,雌雄性比为2.5∶1;成虫羽化孔呈纵裂状,羽化率为46.67%,雌雄性比为1.5∶1;寄生蜂为强姬蜂Cratichneunon sp.,羽化孔呈圆孔状,寄生率为29.33%,性比1∶1。The author investigated the overwintering pupae of Buzuras suppressaria in damaged eucalypt forest by means of individually sampling and random sampling methods,analyzed the spatial distribution of the pupae by 5 aggregation indices,o bserved the bionomics of male and female pupae,parasitic wasp,adult emergence and sex ratio by indoor rearing during March,April and November in 2015. The results showed that the overwintering pupae had an aggregated distribution in the areas of 0-60 cm parallel from the trunk base and 0-10 cm vertical from the soil upper layer. The female pupae had an anal spine in bifurcation,but the male pupae had no bifurcation, sex ratio of female to male is 2. 5∶ 1.The adult had an emergence hole in longitudinal crack, the emergence rate was 46. 67%, sex ratio of female to male was 1. 5 ∶ 1. The parasitic wasp of B. suppressaria is Cratichneunon sp. which has a round emergence hole with parasitism of 29. 33%,and sex ratio of female to male was 1∶ 1.

关 键 词：桉树 油桐尺蠖 越冬蛹 空间分布型 生物学特性 

分 类 号：S763.42[农业科学—森林保护学]