小麦叶蜂绿色防控技术.pptx

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2025-11-24 发布于陕西
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小麦叶蜂绿色防控技术.pptx

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VI.GreenPreventionandControlofWheatSawfly

CaoJian

(I)OccurrenceandDamageWheatsawfly,alsoknownassmallarmyworm,fallsintoTenthredinidae,Hymenoptera.Itiswidelydistributed,mainlyinthewheatregionsnorthofHuaiheRiver,andoccasionallyinsomewheatregionsinSichuanandChongqing.Itisakindofintermittentrampantpest.Itdamagestriticeaecropsandweedssuchasamurfoxtail.Itslarvaedamagewheatleaves,bitinginwardfromtheedgeofaleaftoformanotch,andeatingupallthewheatleavesinseriouscases.VI.GreenPreventionandControlofWheatSawfly

(II)MorphologicalRecognition1.Imago.8-9.8mmlong,blackwithslightblueluster,andthereisawhitespotoneachsideofthemetathorax.Transparentandmembranouswings,withverythinyellowishspots.Smooththoraxandabdomen,withscatteredfinepuncta.Smallblackscutellum,nearlytriangular,withfineandthinpuncta.2.Egg.Kidneyshaped,slightlyflat,lightyellow,andsmoothsurface.3.Larva.5nymphalinstars.Afinal-instarlarvais18-19mmlong,cylindric,withaslightlythickerthorax,aslightlythinnerventralend,andtransversewrinklesateachsegment.Yellowish-brownhead,grayishgreenthoraxandabdomen,darkblueback,withapairofdarkspotsonthebackofthedistalsegment,andadarkstripeonthebaseofthepleopod.4.Pupa.9.8mmlong.Malesareslightlysmaller,yellowishtobrownishblack.Thickandbigcephalothorax,smallabdomen,withbifurcatedends.VI.GreenPreventionandControlofWheatSawfly

VI.GreenPreventionandControlofWheatSawfly

(III)OccurrenceRegularityWheatsawflyhas1generationinayearinChina.Itoverwintersintheformofpupaeatthedepthof20-25cminthesoil,andbeginstoemergeafterthetemperaturerisesinspring.Itsadultsusesaw-shapedovipositorstolayeggsinthetissuesbesidethemainveinsofleaves.Larvaeinthe1stto2nd