玉米螟卵龄对玉米螟赤眼蜂和松毛虫赤眼蜂种间竞争的影响

201033575－80JournalofNanjingAgriculturalUniversityhttp//nauxb.njau.edu.cn2010－06－1930871671“”2006BAD08A02。*[e-mail]。．J.201033575－801121*1.2100952.100089。140.16%66.26%。。6h36h12h21。S476A1000－2030201005－0075－06EffectsofOstriniafurnacaliseggageoninterspecificcompetitionbetweenTrichogrammaostriniaeandTrichogrammadendrolimiZHANGYan-feng1CAIHao1ZHANGFan2LIYuan-xi1*1.KeyLaboratoryofMonitoringandManagementofCropDiseasesandPestInsectsMinistryofAgricultureNanjingAgriculturalUniversityNanjing210095China2.InstituteofPlantandEnvironmentProtectionBeijingAcademyofAgriculturalandForestrySciencesBeijing100089ChinaAbstractTheparasitismbehaviorofTrichogrammaostriniaeandT.dendrolimionOstriniafurnacalisandtheeffectsofhosteggageonoffspringofthetwoparasitoidswereinvestigatedinthelaboratory．TheresultsindicatedthattimeconsumedforcompletingoneparasitizationforT.dendrolimiwassignificantlyshorterthanthatforT.ostriniaewhereasthepercentageofparasitization66.26%withovipositionwassignificantlyhigherforT.ostriniaethanthat40.16%forT.dendrolimi．ThenumberoffemaleoffspringproducedwasnotsignificantlyaffectedbyhosteggagewhenO.furnacaliseggswereexposedtoonlyT.ostriniaewhereasitwassignificantwhenO.furnacaliseggswereexposedtoonlyT.dendrolimi．Competitionincreasedthenumberoffemaleoffspringwaspsinallhosteggagestestedbutthebodysizeofoffspringwassignificantlysmallerthanthatwhen6hor36hhosteggswereexposedonlytoT.ostriniaeorT.dendrolimi．WhenthehosteggswereexposedtoT.ostriniaethenumberofdeadoffspringwasnotsignificantlyaffectedbyhostagewhereasitwassignificantlyaffectedandincreasedwithhostagesforT.denrolimi．Whenhosteggswereexposedtotwowaspspeciesthenumberofdeadoffspringwasp21wassignificantlymoreintreatmentwith12hhosteggthanthatwithotherthreehostagesamongthosethreehostagesthenumbersofdeadoffspringwaspwerenotsignificantlydifferent．KeywordsTrichogrammaostriniaeTrichogrammadendrolimiOstriniafurnacaliseggageinterspecificcompetition1。2060TrichogrammadendrolimiTrichogrammaostrinieaeOstriniafurnacalis2－6。313。255%90%。7。8－1112－13。3336h484h14。。、15－17。。11.1。。Corcyracephalonica25±1℃、14h。25℃24h10%。。1.21.2.1、、62cm×2cmA4。24h1。。。1819。30。1.2.22cm×2cm。4。3.5cm、9.5cm。6、12、2436h4、3。∶=1∶51∶1。25±1℃、70%6h。25±1℃、15h、70%24h1。12h1。。20。1.3t=/×100%U。。ANOVA、20。。22.1t=8.02P＜0.01t=5.93P＜0.01t=3.98P＜0.011。U=5.81＞U0.01=2.581。6751珔x±SETable1TimeconsumedbyTrichogrammaostriniaeandT.dendrolimiinparasitizingOstriniafurnacaliseggSpecies/sExternalcheck/sDrilling/sLayingegg/sOverall/%RatioofparasitizationtimeswithovipositionT.ostriniae20.6±1.2a43.3±1.4a58.9±2.2a92.9±2.9a66.26aT.dendrolimi18.0±0.7a29.7±0.9b41.1±2.0b78.2±2.4b40.16bP＜0.05。DatainsamecolumnfollowedbydifferentsmalllettersaresignificantlydifferentP＜0.05．Sameashereinfollowingtables．2.22F=3.11DF=359P＜0.0524h6h12h12h。F=1.55DF=364P=0.21。F=1.31DF=360P=0.28F=2.22DF=359P=0.10。24h6ht=2.37＞t0.0540=2.0312ht=2.46＞t0.0526=2.0524ht=0.84＜t0.0528=2.0436ht=2.06＞t0.0531=2.03。24h6ht=3.24＞t0.0530=2.0412ht=2.97＞t0.0528=2.0524ht=0.76＜t0.0528=2.0436ht=3.44＞t0.0531=2.046ht=1.44＜t0.0530=2.0412ht=0.82＜t0.0530=2.0424ht=0.52＜t0.0530=2.0436ht=1.68＜t0.0531=2.04。F=1.55DF=364P=0.216h36h12h6ht=2.27＞t0.0532=2.0436ht=2.19＜t0.0530=2.05。2珔x±SETable2NumberoffemaleoffspringemergedfromO.furnacaliseggsexposedtoeitherT.ostriniaeorT.dendrolimiorbothsimultaneously/hHostageNumberoffemalewaspsemergedperhostunitT.ostriniaeT.dendrolimiExposedtoT.ostriniaeandT.dendrolimisimultaneouslyT.ostriniaeT.dendrolimiTotal613.4±1.6aA8.0±1.8bB8.8±1.7a7.9±1.3ab17.4±2.5aA129.6±1.4aA5.7±0.8bB7.9±1.1ab4.0±1.1b*11.2±1.6bA2410.2±1.4aA12.3±2.2aA5.4±1.4b8.2±1.6ab14.5±1.9abA3612.5±2.1aA8.0±1.3bB9.8±1.5a9.5±2.9a18.0±2.6aA1P＜0.05。Datainsamerowfollowedbydifferentcapitallettersaresignifi-cantlydifferentP＜0.05．SameashereinTable4and5．2*t=2.45＞t0.0535=2.03。*Meansaresignificantlydifferentbetweentwospeciest=2.45＞t0.0535=2.03．2.3。F=40.54DF=31637P＜0.001。F=29.42DF=3831P＜0.001。F=40.41DF=31025P＜0.001。F=9.46DF=3699P＜0.001。6h24h。6ht=1.94＜t0.05660=1.9612ht=7.12＞t0.05717=1.9624ht=6.14＞t0.05471=1.9736ht=10.47＞t0.05814=1.96。6ht=5.17＞t0.05378=1.9712ht=1.98＞t0.05261=1.9724ht=0.98＜t0.05469=1.9736ht=11.81＞t0.05422=1.973。77333珔x±SETable3EffectsofhostageonbodysizeofT.ostriniaeandT.dendrolimioffspringwasps/hHostage/mmBodysizeofemergedoffspringT.ostriniaeT.dendrolimiExposedtoT.ostriniaeandT.dendrolimisimultaneouslyT.ostriniaeT.dendrolimi60.46±0.00aA0.46±0.00bA0.44±0.00aB0.41±0.01bB120.48±0.00aA0.46±0.01bA0.44±0.00aB0.45±0.01aA240.48±0.01bA0.42±0.00cA0.44±0.01aB0.41±0.00bB360.44±0.00cA0.49±0.01aA0.38±0.00bB0.40±0.00bBP＜0.05。Capitallettersindicatetheresultsofcom-parisonbetweensamewaspspeciesonsameagehostdatafollowedbydifferentcapitallettersaresignificantlydifferentP＜0.05．2.4F=0.27DF=360P=0.85F=0.45DF=358P=0.72。F=4.28DF=357P＜0.0112h36、2436hF=0.12DF=241P=0.894。4珔x±SETable4EffectsofO.furnacaliseggageonsexratioofoffspringofT.ostriniaeandT.dendrolimi/hHostage/%Femalesexra