If left unchecked, pigweed, a broadleaf weed with a global presence, can significantly undermine corn yields. Significantly affecting different parts of the corn plant, pigweed competes for light, water, and nutrients, often resulting in stunted growth and reduced yield.

In terms of physiology, pigweed can interfere with the photosynthesis process in corn. The rapid growth and dense canopy of the weed can obstruct light from reaching the corn plants, impairing their ability to produce energy through photosynthesis.

Moreover, pigweed can also affect the root system of corn. The weed's extensive root system can outcompete corn for water and nutrients in the soil, leading to nutrient deficiencies and decreased plant vigor.


Amaranthus, commonly known as pigweed, is a resilient and rapid-growing weed wreaking havoc in wheat fields worldwide.

Pigweed often outgrows wheat for essential resources, stunting wheat growth and diminishing grain yield. Affecting various parts of the wheat plant, pigweed’s dense growth can overshadow wheat plants, hampering their photosynthesis. The weed's expansive root system can also vie with wheat roots for water and nutrients. Finally, it can change the plants' nutrient uptake, leading to nutrient deficiencies, and affect the plants' water status, resulting in water stress.

Pigweed's presence can also complicate and prolong the harvesting process. The weed's thick stems can jam machinery, leading to increased maintenance costs.

(Image Credit: Howard F. Schwartz, Colorado State University, Bugwood.org)


How to Identify Pigweed


Pigweed is identifiable by its vertical growth pattern, often reaching heights of 1-2 meters. Its leaves, typically oval or egg-shaped, have a long petiole and a smooth surface with a prominent central vein.

The plant's flowers are small, green, and densely clustered in a spiky arrangement at the top and along the stems. Its seeds are tiny, shiny, and either black or dark brown.

Rapid growth is a telling sign of pigweed. In optimal conditions, this weed can grow 2-3 inches per day, swiftly outcompeting corn for resources.

Another indicator is the presence of numerous seeds. A single pigweed plant can produce up to 100,000 seeds, which can stay viable in the soil for several years.


Early identification of pigweed can empower farmers to implement necessary control measures. Here are some distinguishing features to aid in its detection:

Pigweed can tower up to 2 meters in height. Its stem is thick, hairy, and exhibits a reddish hue, while its leaves are arranged alternately, long, oval-shaped, and possess a waxy sheen.

Pigweed blooms small, greenish flowers that cluster into long spikes at the plant's apex. Its seeds are minuscule, shiny, and either black or dark brown.

(Image Credit: Howard F. Schwartz, Colorado State University, Bugwood.org)


Geographic Distribution of Pigweed


Pigweed is a highly adaptable weed that can flourish in various climates and soil types. It is most prevalent in the Midwest and Southern United States but can also thrive in other regions with similar conditions.


Pigweed is a widespread weed, especially in North America, Europe, and Asia. It flourishes in disturbed soils, typical of agricultural fields.

Timing of Pigweed Emergence


This weed typically emerges in the early growing season, often before corn planting. However, it can continue germinating throughout the growing season, posing a persistent threat to corn crops.


Pigweed sprouts in the spring and continues its growth through summer. As a warm-season annual weed, it completes its life cycle within a year and favors warm temperatures.

How to Manage Pigweed in Corn


To manage pigweed in corn, consider a layered approach with pre-emergence residual herbicides and effective post-emergence herbicides.




These rates are general guidelines. Always read and follow the specific instructions on the product labels for accurate application rates and any additional precautions.

How to Manage Pigweed in Wheat


There are a few products that can help manage pigweed in wheat.


  • Huskie®

  • Rapport Tank Mix + 2,4-D LV6 Value Pack. Do not tank mix 2,4-D with a sulfonylurea herbicide in the fall or serious crop injury could occur. Wheat should be fully tillered before applying 2, 4-D, or tillering will be inhibited, reducing wheat yield potential. MCPA herbicides like MCPE Phenoxy are preferable to 2,4-D if spraying wheat that is not well-tillered.


Always adhere to the recommended application rates and guidelines provided on the product labels for safe and effective use.


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This content was generated with the assistance of Norm℠, FBN’s artificial intelligence (AI) Ag Advisor, based on a dataset of information containing general industry best practices and research. The AI model did not use specific external sources to generate this content. Our process involves using AI to aid human subject matter experts with the initial drafting and/or refinement of content.

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Every product that labels PIGWEED 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 42,4-D Amine 4 Herbicide2,4-D Granules2,4-D LV 42,4-D LV 4 (Albaugh)2,4-D LV 6 (Albaugh)2,4-DB 1752,4-DB 1752,4-DB 175 Herbicide2,4-DB 2002,4-DB 2002,4-DB 2002,4-DB 200 Herbicide2,4-DB DMA 1752,4-DB DMA 2004-Speed®4-Speed® XT638 Herbicide875 BrushkillerAAtrex® 4L HerbicideAAtrex® Nine-O®Abundit® EdgeAbundit® EdgeAccolade™ HerbicideAccord® XRT HerbicideAccord® XRT II HerbicideAccurate® HerbicideAcellus™ ATZAcumen® HerbicideAim® EC HerbicideAim® EW HerbicideAlecto™ 41SAlligare 2,4-D AmineAlligare 2,4-D LV6Alligare Dicamba 2,4-D DMAAlligare Diuron 4LAlligare Imazapyr 2 SLAlligare Imazapyr 4 SLAlligare MSM 60Alligare Oryzalin 4Alligare Rotary 2 SLAlligare Triumph® 22KAlly® XPAlly® XPAmine 4 2,4-DAmine 4 2,4-D HerbicideAmine 400 2,4-D Weed KillerAmine 6Antik™ ECAquamaster®Arrest CSArrest PlusArroz 80®Arsenal® herbicideArsenal® herbicide Applicators ConcentrateArsenal® PowerLine™ herbicideArtillery™ WSPAsset-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 DFAuthority® MaxxAuthority® MTZ DFAuthority® XL HerbicideAxill Solutions Paraquat 3SLAxiom® DFBalan™ DFBarrage® HFBarricade® 4FLBarricade® 65WGBasagran®Basagran® HerbicideBasagran® HerbicideBasamid® GBase Camp® Amine 4Base Camp® LV 6Basis® HerbicideBattleship® IIIBayonet® 2Beacon® HerbicideBiathlon® Ornamental HerbicideBicep II MAGNUM®Bicep II MAGNUM® FCBicep Lite II MAGNUM®BK 800BOABrahma 44Brake®Brake®Brawl II ATZ™Brawl II™Breakfree®Breakfree® NXTBreakfree® NXT [supplemental dist.]Breakfree® NXT ATZBroadhead® HerbicideBroclean®Broclean® HerbicideBromacil/Diuron 40/40Brox®-M UltraBrushmaster® HerbicideBuccaneer® (55467-10)Buccaneer® 5 ExtraBuccaneer® Plus (55467-9)Bullet® HerbicideBurnMaster™ HerbicideButyrac® 175Butyrac® 200Cadence® ATZ NXTCadence® HerbicideCadence® LA NXTCadence® NXT HerbicideCanopy® EX HerbicideCaparol® 4LCarnivore® HerbicideCasoron® CSCavalcade® 65WDG HerbicideCavalcade® PQChange Up™ Selective HerbicideChaparral™ Specialty HerbicideCharger Basic®Charger MAX®Charger MAX® ATZCharger MAX® ATZ LiteChlorimuron 25 WDGCinch®Cinch® ATZCinch® ATZ LiteCiramet™ HerbicideClassic® HerbicideClassic® HerbicideClean Amine®Cleansweep® D HerbicideCleansweep™ M HerbicideCleanWave® HerbicideClearGraze®Cloak® EXCobra® HerbicideColt®+Salvo® HerbicideColt®+Sword® HerbicideConfidence®Confidence® XtraConfidence® Xtra 5.6LCool Power®Cornbelt® 4Lb. AmineCornbelt® 4Lb. Lo Vol EsterCornbelt® 6Lb. Lo Vol EsterCornbelt® Atrazine 4LCornbelt® Atrazine 90DFCornbelt® SalvanCornbelt® Trifluralin ECCornerstone K HerbicideCornerstone®Cornerstone® 5 PlusCornerstone® Plus (1381-192)Cornerstone® Plus (524-454-1381)Cotoran® 4LCotton-Pro®Craze®Credit® 41 ExtraCredit® 5.4 ExtraCredit® XtremeCrew® Specialty HerbicideCurbit® ECCurio® HerbicideCyclone™ SL 2.0D-638Dagger®De-Amine™ 4De-Ester™LV4Defy® Amine 4Defy® LV-4Defy® LV-6Degree Xtra® HerbicideDegree Xtra® HerbicideDegree® HerbicideDepth Charge™Derive 75 DFDerive® 4LDesperado® Selective HerbicideDetermine™ 4LDevour™Dicamba De-Amine®Dimetric® DF 75%Dimetric® EXTDimetric® LiquidDintec Treflan® 4D HerbicideDirex® 4LDiuron 4LDiuron 4LDiuron 4LDiuron 4L (Drexel)Diuron 80Diuron 80 DFDiuron 80 WDG Weed KillerDiuron 80DFDiverge® SilkDMA® 4 IVM HerbicideDouble Up® B+DDri-Clean® HerbicideDrillDual II MAGNUM® SIDual IIG MAGNUM®DuetDuet®Duramax® HerbicideDurango® DMA® HerbicideDurango® DMA® HerbicideE-2 HerbicideEcomazapyr 2 SLElectra 5.6LElliptical™ HerbicideEmbed® ExtraEmbed™EndRun®Endurance® HerbicideEnvy™Envy™ IntenseEnvy™ Six MaxEptam® 7-E Selective HerbicideEscalade® 2EssensaEtcetraEvade® 4 FLEverpreX™Evik® DFFallOut™ HerbicideFallow Master® BroadspectrumFarmer's First™ Acetochlor 7EC HerbicideFearlessFearless Xtra 5.6LFearless Xtra HerbicideFinale® XL F-VM herbicideFireBallFirestorm®FirstRate® HerbicideFirstRate® HerbicideFive Star®Formula 40®ForrestFoundation® Turf HerbicideFour Power Plus®Framework® 3.3 EC HerbicideFreelexx®FrontRunner™Fugitive®Full Deck™FulTime® NXTGallery® 75 Dry Flowable Specialty HerbicideGallery® SCGalvan®GCS 2,4-D LV 6 EsterGCS Acetochlor 7ECGCS Atrazine 4LGCS Atrazine 90DFGCS Flumet 80WDGGCS Metola Plus 8ECGlory®Glory® 4LGly Star® 5 ExtraGly Star® GoldGly Star® K-PlusGly Star® OriginalGly Star® PlusGly Star® Pro Grass and Weed KillerGlyfine™ PlusGlyfos® X-TRA HerbicideGlyphogan® HerbicideGlyphogan® Plus HerbicideGlyphosate 4 PlusGramoxone Inteon®Gramoxone® SLGramoxone® SL 2.0Graslan® LGrasp® SC HerbicideGrasp® Xtra HerbicideGravitas®Grazon® P+D Specialty HerbicideGrazonPD3™GunSlinger®Gunslinger® P+DHABITAT® herbicideHalomax™ 75Hamper™ HerbicideHamper™ II HerbicideHarass® HerbicideHarbinger® Herbicide (241-337-34704)HardBall®Harmony® GT XPHarmony® SG Herbicide (with TotalSol®)Harmony® SG with TotalSol®Harness® 20G HerbicideHarness® HerbicideHarness® Herbicide (Monsanto)Harness® XtraHarness® Xtra (Monsanto)Harness® Xtra 5.6 LHarness® Xtra 5.6LHarrow™Hat Trick® Three Way HerbicideHavoc LV-SixHavoc™ LV FourHeadwinHelena Atrazine 4F HerbicideHelena Atrazine 90-DGHelena® PendimethalinHelmetHelmet SPCHelmquat 3SLHerbivore® HerbicideHoncho® HerbicideHoncho® K6 HerbicideHoncho® K6 Herbicide (Monsanto)Honcho® PlusHornet® WDG Broadleaf Blend HerbicideHorsepower® Selective HerbicideHoss® UltraHyvar® XHyvar® XHyvar® X CropImiFlex™Imitator® PlusImpose®Infantry™ 4LInfantry™ 90DFIntermoc™Intrro®K-Pam® HLKarmex® DFKerb® SCKeystone® LA NXTKeystone® NXTKleenUp® Pro HerbicideKochiavore®Krovar® DF Crop HerbicideKrovar® I DFKrovar® I DF HerbicideKrovar® IVMLademLadem ATLandmaster® BWLandmaster® II HerbicideLariat®League® HerbicideLedger™ HerbicideLima 6Lineage® Clearstand® HerbicideLo-Vol 4 2,4-D Low VolatileLo-Vol 6 2,4-D Low Volatile HerbicideLongbow™ ECLow Vol 4 Ester Weed KillerLow Vol 6 Ester Weed KillerMad Dog®Mad Dog® 5.4Mad Dog® PlusMaestro® 2ECMaestro® 4ECMakaze Yield Pro®Makaze® HerbicideMamba™Mauler™ HerbicideMCP Amine 4MCP Ester 4 HerbicideMCPA Amine 4MCPA Amine 4 (Albaugh)MCPA L. V. 4 EsterMCPA-4 AmineMCPE PhenoxyMCPP-p 4 AmineMe-Too-Lachlor™Me-Too-Lachlor™ IIMe-Too-Lachlor™ MTZMe-Try-Buzin™ 4LMe-Try-Buzin™ 75DFMec Amine-D®Mecomec® 4 Turf HerbicideMedal®Medal® IIMedal® II ATMedal® II ATZMedal® II ECMerissaMetalicaMetalliS™ MTZMetalliS™ PFXMetam CLR™ 42%Metam KLR™ 54%Metolachlor 8EMetribuzin 4LMetribuzin 75Metribuzin 75DFMetricor™ 4FMetricor™ DFMetriflex 4SCMetrixxMetrixx 75DFMetrixx SCMezaVue™Micro-Tech®Milo-Pro®Mirage® (524-445-34704)Moccasin® MTZMoccasin™Moccasin™ II PlusMojave 70 EGMongoose™ HerbicideMoxy® 2EMSMA 6 PlusMSMA 6.6MTZ Co-PackNorthstar® HerbicideNufarm Double O™ SPC HerbicideNufarm Imazapic 2SLNufarm Imazapic 2SL IVM HerbicideNufarm Imazuron™ HerbicideNufarm Polaris® AC Complete HerbicideNufarm Polaris® AC HerbicideNufarm Polaris® HerbicideNufarm Polaris® SPNufarm Prosedge Selective HerbicideOmni® Brand Metribuzin 75 DFOpensight® Specialty HerbicideOpti-Amine®Orchard Clean®Orchard Star®Oryzalin 4 A.S. HerbicideOust® XPOust® XPOverTime™ ATZ Lite NXTOverTime™ ATZ NXTOverTime™ HerbicideOverTime™ NXTPacoPanoramic® 2SLPanther® D HerbicidePanther® MTZ HerbicidePara-Shot 3.0Parallel® HerbicideParallel® PCS HerbicideParallel® PlusParaquat 43.2% SLParaquat ConcentrateParazone® 3SLParazone® 3SLParrot™ 4LParrot™ DFPastora®PasturAll® HL Specialty HerbicidePasturAll® Specialty HerbicidePastureGard® HLPastureGard® Specialty HerbicidePatriot® HerbicidePatron® 170Payback ATZPeak®Peak®Pendulum® 2G granule herbicidePendulum® 3.3 EC herbicidePendulum® AquaCap™ herbicidePennant MAGNUM®Perfection® Weed & Feed 21-7-14Phenomenon™Phenomenon™ DuoPhoenix Hammerkop™ HydroCapPhoenix Harrier® 4LPhoenix Knighthawk®Phoenix Starfighter® 2GPicturePin-Dee™ 3.3 ECPin-Dee™ 3.3 T & OPlateau® herbicidePowerZone® Broadleaf Herbicide for TurfPrefix® HerbicidePrescott HerbicidePresidual™ HerbicidePrimeraOne® Prodiamine 4LPrimeraOne® Prodiamine 65WDG HerbicidePrincep® 4LPrincep® Caliber 90® HerbicidePrincep® LiquidPriority 8EPriority® MTZProClipse® 65 WDGProDeuce®Prodiamine 65 WGProfine™ 75Progeny® HerbicidePrometryne 4L HerbicidePromote™PROSlam™ 4SCProwl® 3.3 EC herbicideProwl® H2O herbicidePurestand™Purgatory™ 3 SLPyresta®Pyrimax™ 3.2 L HerbicidePython® HerbicidePython® WDG HerbicideQ4® Plus Turf Herbicide Grassy & Broadleaf WeedsQuake™ HerbicideQuickSilver® T&O HerbicideQuik-Quat™Quincept®Radar™ AM 4Rancor™ 4 FRancor™ 75 DFRanger PRO® HerbicideRanger PRO® Herbicide (Monsanto)Rascal® PlusRazor Burn®Razor® Xtreme HerbicideRebelEX® HerbicideRegiment® EZ HerbicideRegiment® HerbicideReptile WDGResolute® 4FLResolute™ 65WGRhomene® MCPA BroadleafRhonox® MCPARiceBeaux®RiceBeaux®RiceEdge® 60 DFRiceOne CSRiceOne® CSRicePro®RiceShot 48 SFRifle®-DRinde HerbicideRonstar® GRoundup Custom®Roundup Custom® (Monsanto)Roundup PowerMAX®Roundup PowerMAX® 3 (Monsanto)Roundup PowerMAX® 3 HerbicideRoundup PowerMAX® HerbicideRoundup PowerMAX® IIRoundup PowerMAX® II (Monsanto)Roundup PRO® ConcentrateRoundup PRO® Concentrate (Monsanto)Roundup PRO® HerbicideRoundup PRO® Herbicide (Monsanto)Roundup PROMAX® HerbicideRoundup PROMAX® Herbicide (Monsanto)Roundup QuikPRO®Roundup QuikPRO™ (Monsanto)Roundup Ultra®Roundup WeatherMAX® (Monsanto)Roundup WeatherMAX® HerbicideRT 3® HerbicideRT 3® Herbicide (Monsanto)Rugged® HerbicideSahara® DG herbicideSalvo®SalvusSapphire®Satellite® 3.3 herbicideSatellite® FlexSatellite® HydroCap herbicideSavage® Dry SolubleScorch™Sectagon-42® (RUP)Sectagon-K54® (RUP)Sequence®Shar-Max Glyphosate 41% SLSharda Fluometuron 4SCSharpShowcase™ Specialty HerbicideShredder® 2,4-D LV6Shredder® Amine 4Shredder® MCPEShredder™ 2,4-D LV4Shredder™ E-99Sim-Trol® 4L Simazine Flowable HerbicideSim-Trol® 90DF Simazine Dry Flowable HerbicideSimazat™ 4LSimazat™ 90DFSimazine 4LSimazine 4LSimazine 4L FlowableSimazine 90 WDGSimazine 90DFSimazine 90DF (Drexel)Sinbar® WDGSinkerball®Snapshot® 2.5 TG Specialty HerbicideSnapshot® DG Specialty HerbicideSolicam® DF HerbicideSolicam® DF HerbicideSolution Water Soluble®Solve™ 2,4-DSonalan® 10G HerbicideSonalan® 10G HerbicideSonalan® HFP HerbicideSonalan® HFP HerbicideSpeedZone® Broadleaf Herbicide for TurfSpeedZone® EW Broadleaf Herbicide for TurfSpeedZone® Southern Broadleaf Herbicide for TurfSpeedZone® Southern EW Broadleaf Herbicide forTurfSpike® 80DF Specialty HerbicideSpiruS™Spitfire™ HerbicideSpoiler® HerbicideSpyder® Selective HerbicideStadia™Stalwart® C HerbicideStalwart® HerbicideStalwart® MTZStalwart® Xtra HerbicideStalwart® Xtra LiteStaple® LXStatement™ HerbicideStealth CompleteStrategy™StreliuS™ IIStrike 3®Strike Three Ultra® 2Sunphosate 41%Sunphosate 5 MAX (Wynca)Super Trimec® Broadleaf HerbicideSuperBrush™ KillerSuperWHAM!®SuperWHAM!® 80 DF-CASuperWham!® CASuperWHAM!® CASure Power® Selective HerbicideSureGuard® SC HerbicideSurflan® A.S. AgriculturalSurflan® AS SpecialtySurflan® FlexSurflan® Flex T&OSurflan® XL 2GSurge® Broadleaf Herbicide for TurfSurmount® HerbicideSurpass® EC HerbicideSurpass® NXTSurpriceSweep® HerbicideSword®Synchrony® XPTailwind™Target® 6 PlusTemozad®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® MCPA Broadleaf Amine 4Tenkoz® Trifluralin 4 EC (62719-250-55467)Thief™Thistrol® HerbicideTide Hexazinone 2SLTide Hexazinone 75 WDGTide MSM 60 DF HerbicideTopNotch® HerbicideTordon® 22K Specialty HerbicideTouchdown HiTech®Touchdown Total®Touchdown® CTTouchdown® HerbicideTraject™ 4SCTraxion®Treaty®Treflan® 4 EC HerbicideTreflan® HFP HerbicideTreflan® HFP HerbicideTreflan® TR-10 Granular HerbicideTreflan® TR-10® Granular HerbicideTreflan™ 4L HerbicideTrellis®Trellis® SCTremor NXTTremor® ATZ Lite NXTTremor® ATZ NXTTri-Power® Selective HerbicideTriamine®Triangle® HerbicideTribal™TriCor® 4FTriCor® DFTrifluralin 10GTrifluralin 10GTrifluralin 4 E.C.Trifluralin 4 EC HerbicideTrifluralin 4ECTrifluralin 4EC (Drexel)Trifluralin HFTriflurex® HFPTrimec® 1000 Low Odor Broadleaf HerbicideTrimec® 992 Broadleaf HerbicideTrimec® Bentgrass Formula Broadleaf HerbicideTrimec® Classic Brand Broadleaf HerbicideTrimec® Encore Broadleaf HerbicideTrimec® LAF-637 Broadleaf HerbicideTrimec® Southern Broadleaf HerbicideTriple Shot™Triplet® Low OdorTriplet® SFTripzin™ ZCTriumph® 22KTriumph® XTRTrizmet™ IITrizmet™ LiteTrooper® 22KTrooper® P+DTrooper™ ExtraTrooper™ ProTrumpcard®TruPower® 3 Selective HerbicideTrust® HerbicideTurret®TZone™ SE Broadleaf Herbicide for Tough WeedsUnison® Novel BroadleafUP-Front™Usha 6Vapam® HLVegetable Pro® HerbicideVelossa™Velpar® AlfaMax™Velpar® AlfaMax™ (DuPont)Velpar® AlfaMax™ GoldVelpar® AlfaMax™ GoldVelpar® DF VUVelpar® LVengeance® Plus Selective HerbicideVerify™Veteran® 720 HerbicideVisor BroadcropVisor® S-MOCVolley® ATZ LITE NXTVolley® ATZ NXTVolley® Corn HerbicideVolley® NXTVolta®Voucher®Warrant HerbicideWarrant Herbicide (CS)Warrant® Ultra HerbicideWarrant® Ultra Herbicide (Monsanto)Weed & Feed 25-3-5Weed Rhap® A-4DWeedar® 64WeeDestroy® AM-40 Amine SaltWeedmaster® HerbicideWeedone® 638Weedone® 650Weedone® LV4 ECWeedone® LV4 SolventlessWeedone® LV6 ECWestar®Whiteout® 2,4-DWildCard®Willowood Chlorim 25WDGWillowood Cloran DFWillowood Glypho 6Willowood Lactofen 2ECWillowood Metribuzin 75DFWillowood Paraquat 3SLWillowood Sulfen ChlorimWillowood Thionil ECXL 2GZidua® HerbicideZidua® SC herbicideZone 4FZone HerbicideZone Maxx Herbicide