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1、progressonthedistributionofCCNinWheatRhizosphere.Inthe0-10cmdeep,thereisthelargestnumberofcyst,Withthedeepersoil,thenumberofcystdecreased.Buthorizontaldistancewasnodifference.Anddomesticreportedinstancesofthesame,ourcountrycultivateswheatvarietieshavelittlere
2、sistance,relativelyspeakingtestforoatvarietiesofincidencelightinwheatvarieties,Weappraisalwith12species,theoatvarietiesBaiYan8ishigher,theaveragefemaledigital20.2.Butthewheatvarietiesin9high,13inmoderatelysusceptible,andheavydisease.Thespeciesisnotfoundinresi
3、stantvarieties.FromtherandominvestigationofwheatdistributionofCCN,wehavewheatsoilsampling50andisolatedinselectivemediumfromwheatrootsandCCNcyst,whichhasbeenhappenedCCN.byscreeningto20fungalstrainswereindoorscreeningtest,obtainstwocontroleffectbetterfungalstra
4、ins,thediseasecontroleffectreaches50%,decaycystrateswere81.4%and72.9%,Preliminarystudiesonthebiocontrolmechanismagainstwheatcerealcystnematode,theresultsshowedthatZ2andZ4strainhadinhibitiononegg-hatching,Z2andZ4strainswereparasiticoneggsandJ2,thefatalityratet
5、oeggsandJ2weremorethan50%,Z2andZ4strainswereparasiticoneggsandJ2,theparasiteratetoeggswererespectively10.9%and28.3%.andparasiterateoffungustojuvenileswererespectively27.3%and32.8%。Throughtheobservationonmorphologyandmolecularidentification,strainZ2wasidentifi
6、edasAlternariacavityMucoralesisanascomycete,becauseofthis,therearemorethan80species,allavailablerecordsandreportsandnoexactlythesame,sothisfungushasnotbeenidentifiedtogenus,theneedforfurtherstudyonit.Inthesetwobacteriawerefoundinthestudyofbiologicalcharacteri
7、sticsofstrainsofZ2,eitherinthepHrangeoradaptivetemperaturerangeiswide,andthebacteriaoncarbon,nitrogensourceandstrongadaptability,whichisconducivetothelate.Z4strainsincarbon,nitrogensourceadaptabilityisstrong,butthebacteriainalkalineconditions,notsuitableforth
8、egrowthof,andisnotsuitableforhightemperatureenvironment.Keywords：Biologicalcontrol；Cerealcystnematode;resistantvarieties；BiologicalcharacteristicsDirectedby:Prof.ZHOUHongyouApplicantforMa
