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Biology: Roots Tounderstandthebiologyofroot crowns,Iharvestedseveral fromakudzupatchinDover,DEandgrewtheminpots.
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Biology: Roots Asinthe^ield,newvinesgrewfromtherootcrownsandstemnodes.Thishasimportantimplicationsformonitoringand controlstrategies targetingkudzu.
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Control Because newgrowth appears onrootcrowns and
stemnodes,kudzueradicationeffortsshouldidentifythesestructuresinthespringbeforevinesbecomeatangledmess(andtheywill).
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Control:StemNodes& RootCrowns
Toeffectivelykillandremovekudzuplants,youmustremovetheentirecrown.Unfortunately,pullingvinesdoesnotusuallywork.Eventhoughthisnodeisdamaged,meristematic tissueis stillpresenttogeneratenewvines.
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Control:StemNodes& RootCrowns
Instead,useloppers,hand clippers or ahand sawtocut below thecrown.Removethecrown,killtheplant.
Imagecourtesyof“KnockOutKudzu”(KOkudzu.com)TheCoalitiontoControlKudzuWithoutChemicals
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Youmightask,doesthis work,or is there nostoppingkudzu?
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Itworks!Letmeshowyou.
Aspartofmyresearch,Igrew105kudzuplantsfromhandscari^iedseedinthegreenhouse.
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Inearlysummer,pottedplantsweretransplantedtoanagricultural^ieldattheUniversityofDelawareFarm.Eventhoughhebattled“thevine”everysummersince1974onhisownproperty,mydadwaswillingtohelpplantkudzuatUD.
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Ifyouthinkkillinginvasivespeciesisdif^icult,trygrowingthem!Wenotonlydripirrigatedtheplants,butalsoinoculatedthemwithRhizobiumtohelpthemgetstarted.
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Inthisagriculturalsetting,plantswererelativelyfreefromnaturalherbivory and lightcompetition.Plantsweresubjecttooneoffourdifferenttreatments:leafcutting(either50or75%removal)andshootclipping(removalof50or75%ofallshoottips).Treatmentsweredesignedtomimicdamagebypotentialbiologicalcontrol
agentsfromChina.Oncetheplantsgotgoing,theyreallytookoffgrowing.
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Can it becontrolled?
Farmpictures
AndImeantookoff!Notethenewplantsintheforegroundcomparedtosecondyearplants.Ourdesignincluded35one-yearplantsthatwereplanted and harvested after onegrowingseason,and35two-yearplantsthatgrewfortwoseasons.
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Youcanimaginewithkudzu’sreputationthatthefarmstaffwasnotthrilledtolet35plantsoverwinterinoneoftheir^ields…
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Forscale,youcanseethatoneplantis(much)largerthanonekudzuresearcher.
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Attheendofeachseason,abovegroundbiomasswasharvestedbyclippingvinesfromtherootcrown.Eachbagbelow representsoneplant.
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Aftertakingmeasurementsandrecordingdata,plantmaterialwasdriedinagreenhouseandweighed.
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Dryingplantsinthegreenhousewassuf^icienttokillthem.Plantmaterialwasdiscardedonacompostpileandnonewkudzuplantsregeneratedfromthisdiscardedmaterial.
Ma#Frye