大螟天然庇護(hù)所及人工飼料的研究.pdf

1、中國農(nóng)業(yè)科學(xué)院碩士學(xué)位論文大螟天然庇護(hù)所及人工飼料的研究姓名：劉卓榮申請學(xué)位級別：碩士專業(yè)：農(nóng)業(yè)昆蟲與害蟲防治指導(dǎo)教師：傅強(qiáng)20070501AbstractResistanceriskofinsectpeststoBtricoisanimportantpartinofenvironmanmlsafetya55髓sm#nloftransgenicrice跏fugeisaimportantcouotermeasaretodelaythein

2、sectresistanceevolutionAsChinacarriesoutasmallfarmers’cultivativeplantationatpresentitwillbeverydifficultto∞tparticularnontransgenicrefugiaThepinkstemborer(PSB)Sesamiainfere8feedsonmanynon—ricehostplantsnear／inpaddyfield

3、sItisanimportantpathwaytoatilillzethesenonricehostplantsasnaturalrefugeinPSBinsetresistancemanagementHoweveritneedsmoreevidencetocladethepossibilityandefficiencyIousethesehostplantsasrefugesInthepresentstudythepopulation

4、dy’namieandoccurrencecharacterofthePSBtogetherwithitshostprefarancasamongdifferenthostswerestudied，inordertoprovidetheoricalandpracticalevidenceforthelatentnaturalrefugeforPSBInadditionbasedonnofit／ableanificialdietsandr

5、earingteehnolog)‘a(chǎn)nimportanttoolforPSBresistancestudyanartificialdietwasdevelopedforrearingthePSBbyanoahogonaldesigntest，ThemainresultsareasfoIlows：1TheOccurrencecharacterofthePSBpopulationshoweddensitydecrease，larvaldev

6、elopmentdelaybutpupaewetghtincreaseintransgeniecrylAcCpTlricefieldcomparedwiththatinthenon—transganiccontrolMH86ricefieldThespade|distributionpatternofPSBlarvaeperiodinthefieldshowedaggfegatjondistributionbothintransgeni

7、candfloe—transgenicricefieldandalsocanberandomdistributionwhendens／tyisvery10u：2PSBisapolyphagouspestandhasnotcomplete4generationseachyearinrice—growingareasofFuyangZhejiangprovinceItwasfoundon5crops(includingriceOryzasa

8、tivarwateroatZLanialm如lie，maizeZeamays，sorghumSohumwl㈣，sugarcaneSaccharumsinensis)and9weedhostsLbamyardgrassEchn。ch沁crusgalliBalTOWleavedcattailryphaangustifolia1atejuneellusJuneetlusserolinu8googsegrassEleusineindlcaslo

9、ughgrassBeckmanniasvzigaehne，droppingwheatgrassRoegneriakamojileersiariceLeersiahexandra，dallasglassPaspalumdlstlchum，reedMiscanthuss∞cltarmous)ThedominanthostsofPSBvariesbygenerationsThergenerationmainlydamagewateroatna

10、lToW—leavedcat—tail，rice。sorghum，springmaize，MostPSBof19generationliveonnondeehostsasthesowingareaofriceislesswhenPSBOCCURSinoeakperiodOthergenerationsmostliveOndeeasriceisthemainplantinecosystemandgrowingalongtheseflqon

11、althoughthedensityoilriceisnotthehighestThedevelopmentofPSBdi仃ersamongthehostsbutlapoverItissuggestedthatthereareecologicalenvironmentforPSBtransferbetweenriceaadnOllriuehostsbetweengenerationsorwithinagenerationinnatura

12、lfieldsconditions320days’survivalofPSBlarvaefeedonSplantsshowedthatPSBsurvivesbelierOll4crophosts(rice，wateroatcorn，an喧daum)ItsurviveshighestonriceanddevelopefastestorlwateroatOvipositionchoicebyricewateroatmaizesorghum，