桉树枝瘿姬小蜂连续世代种群生命表  

The continuous life-table of Leptocybe invasa

作　　者：朱方丽[1] 邱宝利[1] 任顺祥[1] 

机构地区：[1]华南农业大学资源环境学院昆虫学系,教育部生物防治工程研究中心,广州510640

出　　处：《生态学报》2013年第1期97-102,共6页Acta Ecologica Sinica

基　　金：广东省林业科技创新专项资金项目(2010KJCX015-01)

摘　　要：桉树枝瘿姬小蜂在广州地区一年发生4—5代,且世代重叠,其越冬期为11月中旬到翌年3月底,越冬虫态为大龄幼虫和蛹。在广州自然条件下,通过人工接种和自然接种相结合的方法,桉树枝瘿姬小蜂在2010年3月至2011年3月间共完成4个世代。利用生命表的方法分析桉树枝瘿姬小蜂连续世代可知,第1代的净增值率R0最大,而第2代的最小;第3代的内禀增长率rm和周限增长率λ最大,其世代平均历期T最小;第4代的rm和λ最小,其T最大。这说明第3代桉树枝瘿姬小蜂的种群增长能力最大,对桉树的危害最强。该代害虫的发生时间为7—9月,因此在防治上要注意该阶段的防控和监测。The blue gum chalcid, Leptocybe invasa Fisher ＆ La Salle （ Hymenoptera ： Eulophidae）, is a recently described pest of eucalyptus, which was origined from Australia but first recorded in the Middle East and Mediterranean countries in 2000. The adults of this pest is small black wasp with parthenogenesic or bisexual reprodunction and strict proovigenesis, it lays eggs in the bark of shoots, petioles or the midribs of leaves of Eucalyptus plants, inducing severe injury such as bump- like galls and thereby damages the leaf midribs, petioles and stems. The damage of L. invasa is more severe on seedlings and young trees than that on old trees, which has drew attention not only to the increasing damage on the infested trees but also to the potential economic damage of Eucalyptus forests in more than 25 countries including China. The first invasa in China was in Dongxing county, Guangxi Province in 2007, subsequently found in Guangdong, Fujian, and now it has been classified as a quarantine pest in many provinces of China including Guangxi, record ofL. Hainan and Guangdong, Fujian, Hainan, Sichuan and Jiangxi. Eucalyptus trees are the backbone of afforested areas due to their roles in economic development and environmental maintenance such as major source of timber, firewood and shelterbehs of drifting sands and typhoon, thus how to control the damage of L. invasa is an emergency issue to be solved for Eucalyptus plantation. However, so far very little is known about the biology of this pest. In present study, the morphology of different instars, the fertility, fecundity, female proportion, adult longevity of F1--F4 generation as well as the daily oviposition and daily survival of the L. invasa in Guangzhou were investigated under lab conditions of （ 26± 1 ） ℃, RH 60% --85 %, photoperiod （ L ： D ） 14：10. The continuous life table of L. invasa were determined based on the parameters mentioned above in 2010-2011. Results showed that, there are four generations of L. invasa in Guangzhou and its overw

关 键 词：桉树枝瘿姬小蜂 世代 生命表 

分 类 号：S763.3[农业科学—森林保护学]