寄主利它素和学习行为对赤眼蜂嗅觉反应的影响

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1、环境昆虫学报JournalEnvironmentalEntomology，June2010，32(2)：243—249ISSN1674-0858doi：10．3969／j．issn．1674—0858．2010．02．017寄主利它素和学习行为对赤眼蜂嗅觉反应的影响欧海英，田明义，阮琳，何余容，谢梅琼(1．华南农业大学资源环境学院昆虫学系，广州510642；2．广州市园林科学研究所，广州510405；3．广西出入境检验检疫局，南宁530028)摘要：为弄清灰白蚕蛾Ocinaravarians利它素以及探讨两种卵寄生蜂

2、搜索寄主的过程中的学习记忆能力，本实验采用四臂嗅觉仪测定了松毛虫赤眼蜂Trichogrammadendrolimi和短管赤眼蜂Trichogrammapretiosum对来源于灰白蚕蛾不同部位挥发性物质的嗅觉反应，结果表明，灰白蚕蛾交配未产卵雌蛾腹末鳞片、卵表及其卵液中存在吸引两种赤眼蜂的利它素，且腹末鳞片和卵表中的利它素溶于正己烷，而灰白蚕蛾处女蛾和交配已产卵雌蛾腹末鳞片中没发现吸引两种赤眼蜂的利它素。在学习行为方面，松毛虫赤眼蜂成蜂的学习能力较强，其羽化后学习经历可明显增强其对灰白蚕蛾卵表和卵液的挥发性物质的趋性

3、，而幼期经历对其行为没影响；短管赤眼蜂的学习能力较弱，无论是羽化后的学习经历还是幼期的学习经历对其在卵表和卵液挥发性物质的搜索行为中均无影响。关键词：赤眼蜂；灰白蚕蛾；利它素；学习行为；嗅觉反应中图分类号：Q968文献标识码：A文章编号：1674-0858(2010)02-0243-07Theefectofhostkairomonesandlearningbehavioronolfactoryrespon-sesofTrichogrammaOUHai-Ying’，TIANMing—Yi，RUANLin，HEYu—Ro

4、ng，XIEMei—Qiong(1．DepatmentofEnto-mology，CollegeofEnvironmentandNaturalResources，SouthChinaAgriculturalUniversity，Guangzhou510642，China；2．GuangzhouInstituteofLandscapingandGardening，Guangzhou510405，China；3．GuangxiEntry—exitInspectionandQuarantine，Nanling530028，

5、China)Abstract：OlfactoryresponseofTrichogrammadendrolimiandpretiosumtokairomonesemittedfromthefemaleabdominalscalesofadultandeggsofOcinaravariansweremeasuredbyusingafour·—armol-factometerinlaboratory．Theresultsindicatedthatvolatilesderivedfromeggs．hexaneextract

6、ofeggsur-faceandabdominalSCalesofmated·femalesbeforefirstovipositionstimulatedanintensivesearchingbe-haviortodendrolimiandpretiosum．whichprolongedthestayingtimeoftwoTrichogrammaspeciesinthetreatedareas．However，volatilesfromvirginfemaleandmated—femaleafterovipos

7、itiondidnote—licitthesearchingbehavioroftheparasitoids．Withregardoflearningbehavior．dendrolimiadultsex．pressedastrongerlearningcapacity．Ovipositionexperienceinadultstagesignificantlyenhancedtheirtropismtothevolatilesofeggsurfaceandeggsinclusion．Whilethelearning

8、experienceinlarvalstageofdendrolimihadnoeffectonthebehavioroftheiradults．Whetherhavinglearningexperienceinaduhstageorinlarvalstage．thesearchingbehaviorofpretiosumshowednosig