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Common Lambsquarters in Field Crops

Common Lambsquarters (Chenopodium album L) is one of the most prevalent summer annual broadleaf weeds in North America. Of particular concern agronomically is how this species of weed has developed resistance and tolerance to different herbicide choices so readily. Of historical note, Triazine (Atrazine, Bladex, Princep) Resistant Lambsquarters were one of the first herbicide resistant weeds discovered back in the 60’s-70’s.

Often confused with or referred to as Pigweed (Amaranthus spp), Lambsquarters is frequently found persisting in fields alongside its mis-identified neighbor--they both tend to thrive in similar field situations, histories, and crops, but are actually quite different. The leaves of Lambsquarters appear lance-shaped, triangular, or diamond shaped and as they emerge, they exhibit a gray, almost silver, mealy coating across the leaf surfaces, which gives them away.

Lamsquarters Identification and Impact

Technically, the most similar looking weed to Lambsquarters is actually Atriplex (Atriplex patula L.). They differ by Atriplex having larger cotyledons, a more branching, spreading habit due to the opposite arrangement of the first several pairs of leaves and branches, and leaf bases with a lobe on each side.

Uniquely, Common Lambsquarters’ germination and emergence can be spread over 2-3 months, and even longer. Peak emergence is in mid to late spring. Though not as significant, they can germinate and emerge well into the summer. Once emerged, Lambsquarters grows very rapidly, making it particularly troublesome in soybeans. Data suggests that as little as one lambsquarter plant per foot of row can reduce soybean populations by as much as 25%. In heavy infestations, lambsquarters in soybeans are particularly annoying to combine operators as they readily clog the equipment at harvest when left unabated.

Perhaps the most significant fact about lambsquarters, leading to its infamous reputation with resistance and tolerance, is that a single plant produces an average of over 70,000 seeds with wide variance in dormancy indices, depending on the relative depths of the seedbank. This persistence is the cornerstone to causing headaches for farmers and advisors alike. On average, it takes 12 years to deplete the seed bank by 50% and nearly 80 years to approach elimination (99%).

Control programs and scouting for lambsquarters should focus on the spring germinating populations. Because of its rapid growth once emerged, planting into a soil where lambsquarters is visible will be problematic. The existing population must be burned down or tilled prior to planting. Once it establishes, it can rapidly develop and rob nutrients and moisture from the desired crop. Later germinating lambsquarters in corn that has formed its canopy over the row, for example, will not likely be an economic threat; but if it grows along with the germinating corn seed, it will ‘pace’ the corn for light, water, and nutrients and can be a real problem.

Resistance and Tolerance Management

Regardless of the nature of the lambsquarters populating your fields, understanding its life cycle and relative presence or absence in your crops is the key to managing it economically. Tillage; crop rotation; and herbicide rotation are and will always be your best approach. Good recordkeeping of what materials have been used in a field, matched with observations from field scouting, and planning short rotations will come together to lessen the impact of this troublesome weed pest.

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The information provided above was authored by John Diebel and provided by Farmers Business Network, Inc. for informational purposes only. It does not constitute an endorsement or recommendation of a particular course of action or product. Please conduct your own due diligence prior to selecting a particular course of action or product.
Every product that labels COMMON LAMBSQUARTERS as a weed, pest, or disease the product can be applied against is shown below. Click any product for label and more information.
2,4-D Amine 4 Herbicide2,4-D LV 4 (Albaugh)2,4-D LV 6 (Albaugh)2,4-DB 175 Herbicide2,4-DB 200 Herbicide638 HerbicideAAtrex® 4L HerbicideAAtrex® Nine-O®Accolade™ HerbicideAccord® Concentrate HerbicideAccurate® ExtraAccurate® HerbicideAcellus™ ATZAcifluorfen 2Acquit™ 4 FAcumen® HerbicideAcuron®Acuron® GTAffinity® BroadSpecAffinity® BroadSpec Herbicide (with TotalSol™)Affinity® TankMixAffinity® TankMix Herbicide (with TotalSol®)Afforia™Agri Star Dicamba HDAim® EC HerbicideAim® EW HerbicideAlion® HerbicideAlite™ 27 HerbicideAlligare 2,4-D AmineAlligare 2,4-D LV6Alligare Dicamba 2,4-D DMAAlligare Dicamba 4Alligare MSM 60Alluvex™Ally® Extra SG Herbicide (with TotalSol®)Amine 4 2,4-D HerbicideAmine 400 2,4-D Weed KillerAmvac Scepter® 70 DG herbicideAndros® 1.88Anthem® ATZ HerbicideAnthem® MaxxAntik™ ECAqua Star®Aquesta™ 4 FAquesta™ FRAquesta™ MTZArgosArmezon® PRO herbicideAsset-S PlusAsulox®Atra-5® HerbicideAtrazine 4L (ADAMA)Atrazine 4L (Drexel) HerbicideAtrazine 4L (Helena)Atrazine 4L (Loveland)Atrazine 4L (Tenkoz)Atrazine 4L Flowable Herbicide (Sipcam)Atrazine 4L herbicideAtrazine 90DF (Drexel)Atrazine 90DF Herbicide (ADAMA)Atrazine 90DF Herbicide (Sipcam)Atrazine 90WDGAtrazine DFAudit® 1:1Audit® 4:1Audit® 75 WDGAuthority® AssistAuthority® Edge HerbicideAuthority® EliteAuthority® First DFAuthority® MTZ DFAutonomy™ HerbicideAvalanche® UltraAxxe®Balance® FlexxBalance® ProBalan™ DFBallast™Banvel 480 HerbicideBanvel® HerbicideBarrage® HFBarricade® 4FLBarricade® 65WGBasagran®Basagran® 5LBasagran® HerbicideBasagran® T&O herbicideBase Camp® Amine 4Base Camp® LV 6BashAzon HerbicideBasis® BlendBatalium® AmpedBatalium® IIBatalium™Bayonet® 2Bellum®Bestow™ HerbicideBeyond® herbicideBeyond® Xtra herbicideBiscayne™Bison®Bison® HerbicideBL4Blanket® 4F HerbicideBlanket® HerbicideBlindside® HerbicideBOABoomer™ HerbicideBoundary® 6.5 ECBoycott™ HerbicideBrahma 44Brash®Breakfree®Breakfree® ATZBreakfree® ATZ LiteBreakfree® NXTBreakfree® NXT [supplemental dist.]BroadAxe® XC HerbicideBroadrange® 55 HerbicideBroadStar® HerbicideBroadworks™Broclean®Broclean® HerbicideBromac®Bromac® AdvancedBromacil 80Bronate® Advanced™Brox® 2ECBrox®-MBrozine®Brush-Rhap®Buccaneer® 5CaballeroCadence® ATZ NXTCadence® HerbicideCadence® LA NXTCadence® NXT HerbicideCadence™ ATZCadence™ Lite ATZ HerbicideCadre® herbicideCalibra™Callisto®Callisto® GTCamo™Candor® HerbicideCapreno®Cavalcade® 65WDG HerbicideCavalcade® PQCelebrity® PlusCelsius® WGChaparral™ Specialty HerbicideChateau® Herbicide SWCheetah® HerbicideCheetah® ProCheetah™ Max HerbicideChisum™ HerbicideCimarron® MaxCimarron® Max HerbicideCimarron® Max Part BCimarron® Max Part B HerbicideCimarron® PlusCimarron® X-traCinco™Ciramet™ HerbicideCivility™ ExtraClarity® herbicideClash® Selective HerbicideCleantraxx™CleanWave® HerbicideCleat® 75 WG HerbicideCobra® HerbicideColt®+Salvo® HerbicideColt®+Sword® HerbicideCommando M™Commando™Commit ATZ Lite HerbicideCommit® ATZ HerbicideCommit® HerbicideComply™ HerbicideComradeCornbelt® 4Lb. AmineCornbelt® 4Lb. Lo Vol EsterCornbelt® 6Lb. Lo Vol EsterCornbelt® Atrazine 4LCornbelt® Atrazine 90DFCornbelt® SalvanCornbelt® Trifluralin ECCorsican HerbicideCorvus®Coyote™Credit® 41Crew® Specialty HerbicideCrossbow® By United SuppliersCrossbow® Herbicide (Dow)Crossbow® LCrossing® 4FCrossroad®Crusher™Curbit® ECCurtail® HerbicideD-638Dacthal® W-75 HerbicideDaikon™De-Ester™LV4Deadbolt®DefiniteDefy® Amine 4Defy® LV-6Depth Charge™Derecho™Derigo® HerbicideDerive® 4LDetail® powered by Kixor® herbicideDetonate® HerbicideDetonate® Herbicide (old version)Diablo® Herbicide (Nufarm)Dicam De-Ester®Dicamba De-Amine®Dicamba DGADicamba DMA SaltDicamba DMA Salt 5Dicamba HD 5Dicamba Max 4Dicamba XPDiCash DGA-4DiFlexx® DUODimetric® DF 75%Dimetric® LiquidDintec Treflan® 4D HerbicideDisha DMADismiss® CA HerbicideDismiss® Turf HerbicideDistinct® herbicideDMA® 4 IVM HerbicideDog Fight™Doleac™ DMADolerity™ DGADouble HeaderDraft™ HerbicideDrexel Dicamba HerbicideDrexel Mes-O-Sate™Dryphosate 75SGDuPont Matrix® SGDuraCor®Durus™Echelon® 4SC HerbicideEdict® 2SCElevore™ Herbicide Arylex™ ActiveEmbed® ExtraEmbed™Encompass™Endurance® HerbicideEngenia HerbicideEnlite®Envoke®Envoke® HerbicideEptam® 20-G GranulesEquip™Escort® XPEsplAnade® 200 SCEsplAnade® EZEsplAnade® SureEstablish ATZ™Establish Lite™Establish™ET® Herbicide/DefoliantET®X Herbicide/DefoliantEvade® 4 FLEvik® DFExpert® HerbicideExplorer®Express® Herbicide (with TotalSol®)Express® XPExtra Credit 5®Extreme® herbicideFever™ HerbicideFeXapan™ herbicide Plus VaporGrip™ TechnologyFierce® EZ HerbicideFierce® HerbicideFierce® MTZ HerbicideFinale® XL F-VM herbicideFinale® XL T&O herbicideFirstRate® HerbicideFirstShot® SG Burndown Herbicide with TotalSol®Five Star®Flexstar® GT 3.5Flumi® 51 WDGFlumi® SX HerbicideFlumigard™ HerbicideFlumioxazin 51% WDG (Redeagle)Flumioxazin 51WDG Select™Foma™ 2.0ForeFront® HLForeFront® R&P Specialty HerbicideForesters'® Non-Selective HerbicideForfeit® 280ForrestForsyte™ 1.88 SLFramework® 3.3 EC HerbicideFreeHand® 1.75G herbicideFreeHand® CA 1.75G herbicideFrequency® herbicideFrontRunner™FulTime® HerbicideFulTime® NXTG-Max Lite™ herbicideGaligan® H2O HerbicideGallery® 75 Dry Flowable Specialty HerbicideGallery® SCGalvan®Gambit® HerbicideGCS 2,4-D LV 6 EsterGCS Atrazine 4LGCS Flumet 80WDGGCS MesoXtra HerbicideGCS Quinclo 4Glory®Glyfos® Aquatic HerbicideGlyphosate 5.4Goal® 2XL HerbicideGoldSky® HerbicideGovee™GR1 HerbicideGR1™GR2Grapple™Gravitas®GrazonNext® HLGrazonNext® Specialty HerbicideGuardsman Max® herbicideGunslinger AMPHalex® GTHalomax™ 75Harass® HerbicideHarbinger® Herbicide (241-337-34704)HardBall®Harmony® Extra SG Herbicide (with TotalSol®)Harmony® GT XPHarmony® SG Herbicide (with TotalSol®)Harmony® SG with TotalSol®Harness® MAX HerbicideHarrow™Havoc LV-SixHavoc™ LV FourHeadwinHelena Atrazine 4F HerbicideHelena Atrazine 90-DGHelena® PendimethalinHelmet MaxxHelosate® 75 SGHelosate® Plus AdvancedHerbivore® HerbicideHi-Dep® Broadleaf HerbicideHighNoon™ HerbicideHinge™HM-1512 AGHornet® HerbicideHornet® WDG Broadleaf Blend HerbicideHuskie® CompleteHuskie® FXHuskie® HerbicideHyvar® XIgnite® 280 SLImazethapyr 2 SLImiFlex™Imitator® AquaticImox™Impact Core™Impact®ImpactZ®Imperium® Selective HerbicideImpose®Incinerate™Infantry™ 4LInfantry™ 90DFInflame™ 280 SLInflict™IntensaInterline® HerbicideIntermoc™Jacket WDGKasai™KatagonKerb® 50-W HerbicideKerb® SC (RUP)Keystone® HerbicideKeystone® LA HerbicideKrovar® I DFKrovar® I DF HerbicideKrovar® IVMKyber™Lambient™Landmark® XPLatigo®Latir™Laudis® HerbicideLeague® HerbicideLeopard™Levity™Lexar®Liberty® 280 SLLiberty® 280 SL HerbicideLifeline®Lifeline® GTLima 6Lo-Vol 4 2,4-D Low VolatileLo-Vol 6 2,4-D Low Volatile HerbicideLock Down™Lock Down™ SCLongbow™ ECLumax®Luxxur B HerbicideMad Dog®Maestro® 4ECMaestro® DMaestro® MAMainline™Mamba™Marengo®Marksman® herbicideMarvel HerbicideMatrix® FNVMaverick™ Corn HerbicideMaxtron™ 4SCMaxunitech Carfentrazone + Sulfetnrazone SEMaxunitech Sulfentrazone 4 SC HerbicideMe-Too-Lachlor™ MTZMe-Try-Buzin™ 4LMe-Try-Buzin™ 75DFMeso StarMesoCore®Mesotrione 4SCMetalliS™ BDXMetalliS™ MTZMetalliS™ PFXMetolachlor + MesoATZMetribuzin 4LMetribuzin 75Metribuzin 75DFMetricor™ 4FMetricor™ DFMetriflex 4SCMetrixx 75DFMetrixx SCMission® HerbicideMongoose™ HerbicideMotif™ HerbicideMSM 60WDG Select™Nektron™ SCNimble®Nortron® SCNoventa™ HerbicideNuance® HerbicideNufarm Imazapic 2SLNufarm Imazapic 2SL IVM HerbicideNufarm Leopard™ HerbicideOctivio™Octivio™ PulseOmni® Brand Metribuzin 75 DFOpensight® Specialty HerbicideOpenSky®OpportunityOptero™OpTill® powered by Kixor® herbicideOpTill® PRO Herbicide (Liquid)OpTill® PRO powered by Kixor® herbicideOrchard Clean®Orchard Star®Outlaw®Outlook® HerbicideOverTime™ ATZ HerbicideOverTime™ ATZ Lite HerbicideOverTime™ ATZ Lite NXTOverTime™ ATZ NXTOverTime™ HerbicideOverTime™ NXTOxyStar® 2EOxystar® 4LPalace™ Selective HerbicidePanoflex™Panoflex™ Herbicide (with TotalSol®)Panoramic 2SLPanther® D HerbicidePanther® HerbicidePanther® MTZ HerbicideParamount® herbicidePastora®PasturAll® Specialty HerbicidePayload® HerbicidePayload® SCPemex™PerfectMatch™ HerbicidePermit Plus®Permit® HerbicidePerpetuo™ HerbicidePhen-Des 8+8®Phoenix Knighthawk®Pin-Dee™ 3.3 ECPiper™ HerbicidePixxaro® ECPlateau® herbicidePlotter® Agricultural HerbicidePlotter® Extra HerbicidePortfolio® 4FPortfolio® 4F CAPortfolio® 4F CaliforniaPowerFlex® HerbicidePowerFlex® HL HerbicidePraxisPraxis PlusPRE-Tector™ Plus ECPrefix® HerbicidePrequel®Presidual™ HerbicidePreview™ 2.1 SC HerbicidePrimeraOne® Prodiamine 4LPrimeraOne® Prodiamine 65WDG HerbicidePrincep® 4LPrincep® Caliber 90® HerbicidePrincep® LiquidPriority MAPriority MesoPriority® MTZPrizeProClipse® 65 WDGProDeuce®Prodiamine 65 WGProfine™ 75Promenade™Promote™Prowl® 3.3 EC herbicideProwl® H2O herbicidePruvin® HerbicidePunchPursuit® herbicidePylex™ herbicidePython® HerbicidePython® WDG HerbicideQuake™ HerbicideQuartz™ 4LQuickSilver® T&O HerbicideQuinark™ EWRadar™ AM 4Rancor™ 4 FRancor™ 75 DFRange Star® XLTRapport® BroadSpec HerbicideRapport® Tank Mix HerbicideRaptor® herbicideRave® HerbicideRazor®Razor® ProRealm® QReciteReckon™ 280SLRedEagle Flumioxazin 51% WDG Specialty + Field (California)Refer® 280 SL HerbicideReflex®Rejuvra™Rely® 280Rely® 280 HerbicideReptile WDGRequire® Q (mp)Resicore®Resicore® XLResolute® 4FLResolute™ 65WGResolve® DFResolve® Q (mp)Resolve® SGRestraint™ herbicideRevitonRezult® B herbicideRezult® G herbicideRezuvant™ herbicideRhonox® MCPARhythm® HerbicideRiceOne CSRiceOne® CSRifle Plus®Ringside®Rixa™Rodeo® HerbicideRometsol®Rowel™ FX HerbicideRowel™ HerbicideRumble®Saber®Saddle-Up®Sage™Salvo®Sandea®Satellite® FlexSatellite® HydroCap herbicideSavage® Dry SolubleScepter® 70 DG herbicideScoparia HerbicideScorch™ EXTScout™ HerbicideScrollOVR™Scroll™ 2 XLSedona®Semera® 51.0% WDGSemera™ SCSentrallas® HerbicideSentrallas™Shafen HerbicideShafen StarSharpSharpen® powered by Kixor® herbicideShieldex® 400SC HerbicideShowcase™ Specialty HerbicideShowdown® HerbicideShredder™ E-99Shutdown™ HerbicideSimazine 4LSimazine 90 WDGSimazine 90DFSimazine 90DF (Drexel)Simplicity® CASinate® HerbicideSinister™Sinkerball®Slider®Slider® ATZSlider® ATZ LiteSmackdown™Snapshot® 2.5 TG Specialty HerbicideSnapshot® DG Specialty HerbicideSolicam® DF HerbicideSolida® HerbicideSolitare® HerbicideSolstice® HerbicideSolve™ 2,4-DSonalan® 10G HerbicideSonic® HerbicideSortie® HerbicideSortie™ ATZSortie™ ATZ LiteSotrion™ HerbicideSparrow™Spartan® 4FSpartan® EliteSpartan® FL 4FSpecticle® FloSpecticle® GSpin-Aid® (RUP)Spin-Aid® HerbicideSquareOne® HerbicideStadia™Stalwart® 2WStalwart® 3WStanza™ HerbicideStarane® NXT HerbicideStatement™ HerbicideStatus® herbicideStaunch® IISteadfast®Steadfast® QStealth CompleteSterling Blue® HerbicideSterling® BlueSterling® Blue DGAStorm® HerbicideStout®Stringent™Strive™Strongarm® HerbicideStrut®Suerte™Sulfentrazone 4LSulfin® 4SCSuprend®SureGuard® HerbicideSureGuard® SC HerbicideSurepyc™SureStart® IISurflan® XL 2GSurmise® 5Surmount® HerbicideSurpass® EC HerbicideSurpass® NXTSurveil™ Co-PackSurveil™ Co-Pack (Surveil™ V)Sweep® HerbicideT-Pac™ XPT-Square™ HerbicideTackle® HerbicideTailwind™Taquet™Tarzec™Tavium® Plus VaporGrip® TechnologyTeamMate®Telar® XPTenacity®Tendovo®Tenkoz® Amine 4 2,4-D (71368-1-55467)Tenkoz® Lo-Vol 4 2,4-D Low VolatileTenkoz® Lo-Vol 4 Solventless HerbicideTenkoz® Lo-Vol 6 2,4-D Low Volatile HerbicideTenkoz® Trifluralin 4 EC (62719-250-55467)TerraVue™Testify™Tetris™ SGThief™Threesidual™ HerbicideThrottle® XPThunder®Tide Glufosinate 280 SLTide Hexazinone 2SLTide Hexazinone 75 WDGTide MSM 60 DF HerbicideTigris™ Sulfen FirstTop Deck™ Aquatic HerbicideTop Gun® HerbicideTopeka®TopNotch® HerbicideTorment®Torocity™Total TNVTotal® 2.3Total® HerbicideTouchdown HiTech®Touchdown® CTTouchdown® HerbicideTough® 5ECTower® HerbicideTraject™ 4SCTravallas™Traxion®Treevix® powered by Kixor® herbicideTreflan® 4 EC HerbicideTreflan® HFP HerbicideTreflan™ 4L HerbicideTrellis®Trellis® SCTremor® ATZ Lite NXTTremor® ATZ NXTTriCor® DFTrifluence™Trifluralin 10GTrifluralin 4 E.C.Trifluralin 4 EC HerbicideTrifluralin 4EC (Drexel)Trisidual™ HerbicideTriumph® XTRTriVolt™Trizar™Trooper™ ProTruslate™ ProTrust® HerbicideTurret®Ultra Blazer® (UPI)Undercover™Unison® Novel BroadleafUP-Front™Upbeet® HerbicideUproarValor® EZ Herbicide¹Vandal® S-MOCVanquish® HerbicideVaristo® herbicideVarro®Varsity®Varsity® SCVeer® Agricultural HerbicideVelossa™Velpar® AlfaMax™ (DuPont)Velpar® AlfaMax™ GoldVelpar® DF CUVenue®Verdict® powered by Kixor® herbicideVibrantVida® Herbicide/DesiccantVilify®Vision™ HerbicideVolley® ATZ LiteVolley® ATZ LITE NXTVolley® ATZ NXTVolley® Corn HerbicideVolta® ExtraVoucher®Vulture™WeeDestroy® AM-40 Amine SaltWeedmaster® HerbicideWeedone® 638Weedone® 650Weedone® LV6 ECWeld® HerbicideWestar®Whistle™Whiteout® 2,4-DWideARmatch™ HerbicideWildCard® XTRAWillowood Cloran DFWillowood Ethofumesate 4SCWillowood Fomesafen 1.88SLWillowood Glufosinate 280SLWillowood Glufosinate 280SL (OT)Willowood Imazethapyr 2SLWillowood Lactofen 2ECWillowood Mesotrione 4SCWillowood Metribuzin 75DFWillowood Metriosate GTWillowood OxyFlo 2ECWillowood Pronamide 3.3SCWillowood Pronamide 50WSPWillowood Sulfen 4SCWillowood Sulfen CloranWillowood Sulfen ImazWillowood Sulfen MetWillowood Sulfentrazone AssistWolverine® AdvancedWolverine® HerbicideXL 2GXtendimax w/VaporGrip Technology (2020)Zaltus™ SCZaltus™ SXZemax™ Selective HerbicideZeus® Prime XCZeus® XCZidua® PRO powered by Kixor® herbicideZidua® SC herbicideZone 4FZone AssistZone DefenseZone Elite