Orangedog

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Material Information

Title:
Orangedog
Physical Description:
Fact sheet
Creator:
Fasulo, Thomas R.
Publisher:
University of Florida Cooperative Extension Service, Institute of Food and Agriculture Sciences, EDIS
Place of Publication:
Gainesville, Fla.
Publication Date:

Notes

Acquisition:
Collected for University of Florida's Institutional Repository by the UFIR Self-Submittal tool. Submitted by Melanie Mercer.
Publication Status:
Published
General Note:
"Publication date: October 1993. Revised: March 1996."
General Note:
"ENY-810"

Record Information

Source Institution:
University of Florida Institutional Repository
Holding Location:
University of Florida
Rights Management:
All rights reserved by the submitter.
System ID:
IR00004630:00001


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FactSheetENY-810 Orangedog1 T.R.Fasulo,J.L.KnappandR.F.Brooks2Theorangedog, Papiliocresphontes (Cram.),isa beautifulswallowtailbutterflycommonthroughout centralandsouthFlorida.Thelarvaisanimportant pestofyoungcitrustrees;itfeedsonfoliage,with orangevarietiesbeingitsfavoredhost.Whileitis seldompresentinlargeenoughnumberstobea threattotreesofbearingage,itcanbehighly destructivetonurserystock,whereintensespray programsreducebiologicalcontrolagentsofthispest. Twoorthreecaterpillarscandefoliateayoungtreein afewdaysbyeatingtheleavesdowntothemid-rib.PHYSICALDESCRIPTIONANDLIFE HISTORYAdult-Theorangedogadult,sometimescalled "TheGiantSwallowtail,"ispredominantlyvelvetblack incolorwithadoubleseriesoflargeyellowspots acrossthewings.Thehindwingshaveapairofred eye-spots,edgedwithblackandblue,andendina distinct"tail". Pupa-Theorangedogpuparesemblesa lichen-coveredtwigorstubofadeadbranch.This stageofdevelopmentisgreyandbrownincolorand lastsapproximately10to14daysbeforetheadult emerges.However,ifitisthelastgenerationofthe year,theinsectswilloverwinterinthepupalcase. Larva-Theimmatureorangedogisabrownand whitecaterpillar,withoccasionalcreamorpaleyellow patchesthatcloselyresemblesabirddropping.It growstoapproximately11/2to21/2inchesinlength. Theorangedogreceivesitsnamefromthisstage becausethefrontsegmentsofthebodyareenlarged, andwhennotfeedingthecaterpillarcanpullitshead backintothesesegments,makingthefrontpartofthe bodyresembleadog.Whenalarmed,thecaterpillar canforceoutofitsheadtwolong,forked,red, horn-likeprojections.Astrong,disagreeableodoris emittedfromtheseprojectionsasadefenseagainst naturalenemies. Egg-Theadultfemaleproducesapproximately fivehundredeggswhicharelaidsinglyontender shootsoronthetopsofemergingleaves.Theeggs arespherical,smoothandpearlywhite,withadull redorreddish-yellowtinge.Thefirsteggshatchas earlyasFebruarywiththestartofthespringflush. Eachgenerationlastsabouttwomonths,and therearefourgenerationsperyear.However,itisthe lastgeneration,presentduringtheperiodAugust throughOctober,whichisthelargestinnumbersand ismostdestructivetocitrus.CONTROLRECOMMENDATIONSAtachinidfly, Lespesiarileyi (Will.),isavery efficientparasiteoftheorangedog.Thisflylays elongated,oval,whiteeggsontheorangedoglarva. Thenewlyhatchedmaggotsenterthelarvaand emergeasadultswhentheorangedogattemptsto pupate.Apredaciousstinkbugandawaspparasite, 1.ThisdocumentisFactSheetENY-810,aseriesoftheEntomologyandNematologyDepartment,FloridaCooperativeExtensionService, InstituteofFoodandAgriculturalSciences,UniversityofFlorida.Publicationdate:October1993.Revised:March1996. 2.T.R.Fasulo,AssociateinEntomology,EntomologyandNematologyDepartment,CooperativeExtensionService,InstituteofFoodand AgriculturalSciences,UniversityofFlorida,GainesvilleFL;J.L.Knapp,Professor-Entomologist,CitrusResearchandEducationCenter, LakeAlfredFL;andR.F.Brooks,RetiredProfessor,CitrusResearchandEducationCenter,LakeAlfredFL. TheInstituteofFoodandAgriculturalSciencesisanequalopportunity/affirmativeactionemployerauthorizedtoprovideresearch,educational informationandotherservicesonlytoindividualsandinstitutionsthatfunctionwithoutregardtorace,color,sex,age,handicap,ornational origin.Forinformationonobtainingotherextensionpublications,contactyourcountyCooperativeExtensionServiceoffice. FloridaCooperativeExtensionService/InstituteofFoodandAgriculturalSciences/UniversityofFlorida/ChristineTaylorStephens,Dean

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Orangedog Page2Brachymeriarobusta (Cress.),alsoplayminorrolesin controllingthispest.Thelarvalstateisalso susceptibletoavirusdisease. Exceptininstanceswherelargepopulationsare present,itisnotfeasibletocontrolthispestby chemicalmeans.Asstatedpreviously,larvaeare seldompresentinlargeenoughnumberstobea threattotreesofbearingage.However,innursery situationsintensesprayprogramscanreducethe abovementionednaturalcontrolagents.Asimpleand effectivemethodofcontrolistopickthelarvaeoffby handanddestroythem. Bacillusthuringensis products arecurrentlyrecommendedbytheUniversityof Floridaforcontrolofthispest.Consultthelatest copyoftheFloridaCitrusSprayGuidefortimingand mixturerecommendations.