影响专食性广聚萤叶甲产卵选择的因素  

An analysis of factors influencing oviposition selection of specialist Ophraella communa(Coleoptera:Chrysomelidae)

作　　者：李保平[1] 徐军 王宏媛 孟玲[1] 

机构地区：[1]南京农业大学植物保护学院农作物生物灾害综合治理教育部重点实验室,江苏南京210095 [2]江苏省无锡市白蚁防治研究所,江苏无锡214001 [3]吉林省环境保护厅,吉林长春130033

出　　处：《生物安全学报》2011年第4期295-299,共5页Journal of biosafety

基　　金：国家重点基础研究发展计划(2009CB119200)

摘　　要：【背景】广聚萤叶甲幼虫常群聚于部分豚草植株取食,可能与成虫产卵选择有关,因此,探究广聚萤叶甲产卵选择的影响因素具有重要意义。【方法】于2005年在广聚萤叶甲的主要分布区(江苏、江西、湖北、湖南)进行了1次随机抽样调查,并在南京城郊于2008年5月25日～9月1日进行了豚草的定点定期跟踪调查,用广义线性模型分析调查因子的影响。【结果】随机抽样调查结果表明,卵块数量随豚草植株冠层直径和健康程度的增大而显著增多,冠层直径每增大1cm,卵块数增多2%;健康程度每提高1级,卵块数增加近2.1倍;在豚草植株被利用程度增大的情况下,卵块数量随植株健康程度增大而增多,如果植株上增加1头幼虫或蛹,则植株健康程度每提高1级,卵块数增多2%,但植株冠层每增大1cm,卵块数减少0.6%。定点定期调查结果表明,豚草上的着卵块概率受豚草斑块大小、植株冠层直径、发育期和生境光照情况等因素的显著影响,豚草斑块每增加1株植物,产卵概率提高0.5%;植株冠层直径每增大1cm,产卵概率提高3%;在暴露生境中的豚草上产卵的概率比遮阴(树下)下的豚草提高近1倍。【结论与意义】豚草植株个体特性对着卵数量有显著影响,而豚草个体和群体特性以及小生境显著影响产卵发生。[Background]Larval aggregative feeding on invasive common ragweed Ambrosia artemisiifolia L.is frequently observed by the specialist Ophraella communa LeSage in the field,which suggests selective oviposition in adult females.[Method]To explore potential factors affecting oviposition choices of the insect a random survey of main distribution areas in China's Mainland was conducted for the number of egg-masses laid during July～August,2005,including Jiangsu,Jiangxi,Hubei,and Hunan Provinces.Additionally,a cross-season survey of tagged plants was made for incidences of oviposition from 25 May to 1 September,2008.Generalized linear models（logit link-function） were used to analyze potential factors influencing the probability of oviposition.[Result]Analysis of the random survey indicated that the number of egg-masses increased with increasing canopy diameter and level of plant healthiness.With every cm of canopy diameter increase,there was an increase of 2% in egg-masses,while the number of egg-masses nearly doubled with one degree increase in healthiness.Under condition of pre-existing presence of one conspecific larva or pupa,egg-masses increased by 2% with plant one degree of healthiness but decreased by 0.6% with 1 cm increase in canopy diameter.A significant influence of plant canopy,healthiness,colonization by conspecifics,and their interactions was found,but not of growth stage.The probability of egg-mass deposition on the plants increased with plant patch size,canopy diameter,growth stage,and habitat shadiness.The probability increased by 0.5% with an increase in plant patch size by one plant,by 3% with an increase in plant canopy diameter by 1 cm.[Conclusion and significance]Factors associated with individual plants influence the number of egg masses deposited,but traits linked with plant population and its habitats affected the probability of egg deposition.

关 键 词：豚草 野外调查 寄主专一性 产卵选择 杂草生防 

分 类 号：S476.7[农业科学—农业昆虫与害虫防治]