Common Lambsquarters


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 42,4-D Amine 4 Herbicide2,4-D LV 4 (Albaugh)2,4-D LV 6 (Albaugh)2,4-DB 1752,4-DB 175 Herbicide2,4-DB 200 Herbicide638 HerbicideAAtrex® 4L HerbicideAAtrex® Nine-O®Abundit™ Extra (Exclusively Distributed by DuPont)Accolade™ HerbicideAccord® Concentrate HerbicideAccurate® ExtraAccurate® ExtraAccurate® HerbicideAcellus™ ATZAcifin™ 2LAcifluorfen 2Acquit™ 4 FAcumen® HerbicideAcuron®Acuron® FlexiAcuron® GTAffinity® BroadSpecAffinity® BroadSpec Herbicide (with TotalSol™)Affinity® TankMixAffinity® TankMix Herbicide (with TotalSol®)Afforia™Agility® SG with TotalSol® Soluble GranulesAgri 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®)Ally® Extra SG with TotalSolAlly® XPAlly® XPAmine 4 2,4-D HerbicideAmine 400 2,4-D Weed KillerAmvac Scepter® 70 DG herbicideAndros® 1.88Anthem® ATZ HerbicideAnthem® Flex HerbicideAnthem® HerbicideAnthem® MaxxAntik™ ECAqua Star®AquaNeat® Aquatic HerbicideAquesta™ 4 FAquesta™ FRAquesta™ MTZArgosArmezon® herbicideArmezon® PRO herbicideAsset-S PlusAsulox®Atra-5® HerbicideAtrazine 4LAtrazine 4LAtrazine 4L (ADAMA)Atrazine 4L (Drexel) HerbicideAtrazine 4L (Helena)Atrazine 4L (Loveland)Atrazine 4L (Tenkoz)Atrazine 4L Flowable Herbicide (Sipcam)Atrazine 4L herbicideAtrazine 90DFAtrazine 90DFAtrazine 90DF (Drexel)Atrazine 90DF Herbicide (ADAMA)Atrazine 90DF Herbicide (Sipcam)Atrazine 90WDGAtrazine DFAtticus Cavallo™ 4 SCAudit® 1:1Audit® 4:1Audit® 75 WDGAuthority® AssistAuthority® Edge HerbicideAuthority® EliteAuthority® First DFAuthority® MTZ DFAuthority® Supreme HerbicideAutonomy™ HerbicideAvalanche® UltraAvalanche® UltraAxill Solutions Glufosinate 280SLAxiom® DFAxxe®Balance® FlexxBalance® ProBalan™ DFBallast™Banvel 480 HerbicideBanvel® HerbicideBarrage® HFBarricade® 4FLBarricade® 65WGBasagran®Basagran® 5LBasagran® HerbicideBasagran® HerbicideBasagran® HerbicideBasagran® HerbicideBasagran® T&O herbicideBase Camp® Amine 4Base Camp® LV 6BashAzon HerbicideBasis® BlendBasis® HerbicideBatalium® AmpedBatalium® IIBatalium™Battle Star®Bayonet® 2Beacon® HerbicideBellum®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.]Breakfree® NXT ATZBroadaxe® HerbicideBroadAxe® XC HerbicideBroadloom® HerbicideBroadrange® 55 HerbicideBroadStar® HerbicideBroadworks™Broclean®Broclean® HerbicideBromac®Bromac® AdvancedBromacil 80Bromacil/Diuron 40/40Bronate® Advanced™Brox® 2ECBrox®-MBrox®-M UltraBrozine®Brush-Rhap®Buccaneer® 5BurnMaster™ HerbicideCaballeroCadence® ATZ NXTCadence® HerbicideCadence® LA NXTCadence® NXT HerbicideCadence™ ATZCadence™ Lite ATZ HerbicideCadet™Cadre® herbicideCalibra™Callisto®Callisto® GTCallisto® XtraCamo™Candor® HerbicideCapreno®Cavalcade® 65WDG HerbicideCavalcade® PQCelebrity® PlusCelsius® WGCelsius® WGChaparral™ Specialty HerbicideChateau® EZChateau® Herbicide SWCheetah® HerbicideCheetah® ProCheetah™ Max HerbicideChiptox® MCPAChisum™ HerbicideCimarron® MaxCimarron® Max HerbicideCimarron® Max Part BCimarron® Max Part B HerbicideCimarron® PlusCimarron® PlusCimarron® X-traCinco™Ciramet™ HerbicideCivility™ ExtraClarifier®Clarifier®Clarity® herbicideClash® Selective HerbicideClean Amine®Cleantraxx™CleanWave® HerbicideCleat® 75 WG HerbicideCobra® HerbicideCollide™ HerbicideColt®+Salvo® HerbicideColt®+Sword® HerbicideCommando M™Commando™Commit ATZ Lite HerbicideCommit® ATZ HerbicideCommit® HerbicideCompensaComply™ HerbicideComradeCornbelt® 4Lb. 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240SLMetolachlor + MesoATZMetribuzin 4LMetribuzin 75Metribuzin 75DFMetricor™ 4FMetricor™ DFMetriflex 4SCMetrixxMetrixx 75DFMetrixx SCMetsulMission® HerbicideMoccasin® MTZMongoose™ HerbicideMotif™ HerbicideMoxy® 2EMSM 60WDG Select™Nektron™ SCNimble®Nimble®Northstar® HerbicideNortron® 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® herbicideOptogen™Orchard Clean®Orchard Star®Outflank™Outlaw®Outlook® HerbicideOverTime™ ATZ HerbicideOverTime™ ATZ Lite HerbicideOverTime™ ATZ Lite NXTOverTime™ ATZ NXTOverTime™ HerbicideOverTime™ NXTOxyfluorfen 2E HerbicideOxyStar® 2EOxystar® 4LPalace™ Selective HerbicidePanoflex™Panoflex™ Herbicide (with TotalSol®)Panoramic® 2SLPanther® D HerbicidePanther® HerbicidePanther® MTZ HerbicidePanther® Pro HerbicidePanther® SC HerbicideParamount® herbicidePasturAll® HL Specialty HerbicidePasturAll® Specialty HerbicidePatriot® HerbicidePayload® HerbicidePayload® SCPeak®Pemex™PerfectMatch™ HerbicidePermit Plus®Permit® HerbicidePerpetuo™ HerbicidePhen-Des 8+8®Phoenix Knighthawk®Phoenix™ HerbicidePin-Dee™ 3.3 ECPindar® GTPiper™ HerbicidePixxaro® ECPlainview® SCPlateau® herbicidePlotter® Agricultural HerbicidePlotter® Extra HerbicidePortfolio® 4FPortfolio® 4F CAPortfolio® 4F CaliforniaPowerFlex® HerbicidePowerFlex® HL HerbicidePraxisPraxis PlusPRE-Tector™ Plus ECPrefar® 4-EPrefix® HerbicidePrequel®Presidual™ HerbicidePreview™ 2.1 SC HerbicidePrimeraOne® Prodiamine 4LPrimeraOne® Prodiamine 65WDG HerbicidePrincep® 4LPrincep® Caliber 90® HerbicidePrincep® LiquidPriority MAPriority MesoPriority® GTPriority® MTZPrizeProClipse® 65 WDGProDeuce®Prodiamine 65 WGProfine™ 75Promenade™Promote™Prowl® 3.3 EC herbicideProwl® H2O herbicidePruvin® HerbicidePunchPurestand™Pursuit® herbicidePylex™ herbicidePython® HerbicidePython® WDG HerbicideQuake™ HerbicideQuali-Pro® Expel Turf HerbicideQuartz™ 4LQuartz™ HerbicideQuelex® Herbicide with Arylex™ ActiveQuickSilver® T&O HerbicideQuinark™ EWQuinStar® 4LRadar™ AM 4Rancor™ 4 FRancor™ 75 DFRange Star®Range Star® XLTRapport® BroadSpec HerbicideRapport® Tank Mix HerbicideRaptor® herbicideRave® HerbicideRavine™Razor®Razor® ProRealm® QRealm® QReciteReckon™ 280SLRedEagle Flumioxazin 51% WDG Specialty + Field (California)Refer® 280 SL HerbicideReflex®Rejuvra®Rejuvra™Rely® 280Rely® 280 HerbicideReptile WDGRequire® Q (mp)Resicore®Resicore® XLResolute® 4FLResolute™ 65WGResolve® DFResolve® QResolve® Q (mp)Resolve® SGResource® HerbicideRestraint™ herbicideRevitonRevulin® QRevulin® QRezult® B herbicideRezult® G herbicideRezuvant™ herbicideRhonox® MCPARhythm® HerbicideRiceOne CSRiceOne® CSRifle Plus®Rifle®Rifle®-DRingside®Rixa™Ro-Neet® HerbicideRodeo® HerbicideRometsol®Rowel™ FX HerbicideRowel™ 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HerbicideTailwind™Talinor™Taquet™Tarzec™Tavium® Plus VaporGrip® TechnologyTeamMate®Telar® XPTelar® 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™Thistrol® HerbicideThreesidual™ HerbicideThrottle® XPThunder Master®Thunder®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®Treaty®Treaty® ExtraTreevix® powered by Kixor® herbicideTreflan® 4 EC HerbicideTreflan® HFP HerbicideTreflan® HFP HerbicideTreflan® TR-10 Granular HerbicideTreflan® TR-10® Granular HerbicideTreflan™ 4L HerbicideTrellis®Trellis® SCTremor NXTTremor® ATZ Lite NXTTremor® ATZ NXTTriCor® 4FTriCor® DFTrifluence™Trifluralin 10GTrifluralin 10GTrifluralin 4 E.C.Trifluralin 4 EC HerbicideTrifluralin 4ECTrifluralin 4EC (Drexel)TripleFLEX® II HerbicideTripleFLEX® II HerbicideTripleFLEX™ HerbicideTrisidual™ HerbicideTriumph® XTRTriVolt™Trizar™TrizMax™Trooper™ ProTruslate™ ProTrust® HerbicideTurret®Tuscany®Tuscany® SC HerbicideUltra Blazer® (UPI)Undercover™Unison® Novel BroadleafUP-Front™Upbeet®Upbeet® HerbicideUproarValor® EZ Herbicide¹Valor® EZ Herbicide²Valor® SX HerbicideValor® XLT Soybean HerbicideVamos®Vandal® S-MOCVanquish® HerbicideVaristo® herbicideVarro®Varsity®Varsity® SCVeer® Agricultural HerbicideVelossa™Velpar® AlfaMax™Velpar® AlfaMax™ (DuPont)Velpar® AlfaMax™ GoldVelpar® AlfaMax™ GoldVelpar® DF CUVelpar® DF CUVelpar® LVelpar® L CUVelpar® L CUVendetta® HerbicideVenue®Verdict® powered by Kixor® herbicideVibrantVictory® HerbicideVida® Herbicide/DesiccantVilify®Vios™ FX HerbicideVision™ HerbicideVolley® ATZVolley® ATZ 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HerbicideZalo® HerbicideZaltus™ SCZaltus™ SXZemax™ Selective HerbicideZeus® HerbicideZeus® Prime XCZeus® XCZidua® HerbicideZidua® PRO powered by Kixor® herbicideZidua® SC herbicideZone 4FZone AssistZone DefenseZone Elite