2016 PMH MASTER - clemson.edu · South Carolina Pest Management Handbook for Field Crops - 2016 76 Preplant Burndown Herbicides for Weed Management in Cotton (cont) Herbicide Rate/Acre

South Carolina Pest Management Handbook for Field Crops - 2016

74

WEEDCONTROLINCOTTON

MikeMarshall,ExtensionWeedSpecialist

PreplantBurndownHerbicidesforWeedManagementinCotton

HerbicideRate/AcreBroadcast

ModeofAction PreharvestInterval

RestrictedEntryIntervalFormulation ActiveIngredient

Aim2EC(carfentrazone)Aim1.9EW

1.0‐2.0floz 0.016‐0.032lb

14

3days 12hours

Comments:Applyanytimepriortoplanting.Forbestresults,applytoweedsthatarelessthan4inchestall(lessthan3inchrosettes).Usehigherratefortreatinglargerweeds.AddaCOC(1‐2galper100galsspraysolution,NIS(1qtper100galsspraysolution,orMSO(1‐2galper100galsofspraysolution).Add2,4‐DLVEtoimprovecontrolofcutleafeveningprimroseandwildradish.Tankmixpartners includeGLYPHOSATE,LIBERTY,GRAMOXONE,2,4‐DLVE,orCLARITY.Rainfastinterval=6‐8hours.

BrakeF162.7SC(fluridone+fomesafen)

16floz 0.15lb+

0.1875lb

1214

None 24hours

Comments: ApplyBRAKEF16 up to 14days beforeplanting cotton. Very effective onPalmer amaranth (glyphosate‐resistantandALS‐resistantbiotypes).Donotapplymorethan16flozperacreperseason.Donotapplybyairorthroughan irrigation system. Dry weather following application of BRAKE F16 will reduce its effectiveness on Palmeramaranth.TankmixBrakeF16withglyphosateand2,4‐Dforcontrolofexistingweedspriortoplanting.FollowupBRAKEF16witharesidualherbicideprogramatplanting.

Clarity4S(dicamba)

8.0floz 0.25lb

4

7days 24hours

Comments:Excellentcontrolofmostwinterannualbroadleafweeds.FollowingapplicationofCLARITYandatleast1inchrainfall,awaitingperiodofatleast21daysisrequiredbeforecottonplanting.Ingeneral,CLARITYislesseffectivethan2,4‐DLVEoncutleafeveningprimrosecontrol.Rainfastinterval=4hours.

Direx4L(diuron)

1.5‐2.0pt 0.75‐1.0lb

7

7days 12hours

Comments:Applyinaminimumof10GPAofwaterperacre.Controlswinterannualweeds(upto2”insize)andprovidessomeresidualcontrolintotheearlygrowingseason.Mustbeapplied15to150dayspriortocottonplanting.AddacompatibilityagenttothespraytankwhentankmixingwithGLYPHOSATE.Donotapplywheresoil‐appliedorganophosphateinsecticidewasusedasseverecropinjurywilloccur.Donotapplytosandyorsandyloamsoilswithorganicmatterlessthan1.0%.Rainfastinterval=heavyrainfallsoonafterapplicationmaywashproductoffofthefoliageandarepeatapplicationmaybeneededtoensureadequateweedcontrol(suggest1hour).

ET0.208EC(pyraflufenethyl)

0.5‐2.0oz 0.0008‐0.003lb

14

‐‐‐ 12hours

Comments:CottonmaybeplantedanytimeafterETapplication.Forbestresult,applyETtobroadleafweedslessthan4inchestallorrosetteslessthan3inchesindiameter.Donotapplymorethan2.0oz/Aforburndown.Addasuitable adjuvant like NIS at 1.0% v/v (1 gal per 100 gal of spray solution) will optimize weed control. Groundapplicationrequiresminimumof10gallons/A.Donotallowlivestocktograzeintreatedareas.Rainfastinterval=1hour.


75

PreplantBurndownHerbicidesforWeedManagementinCotton(cont.)


ModeofActionPreharvestInterval


FlexstarGT3.52.82EC(fomesafen+glyphosate)

3.5‐5.3pt

0.25‐0.37lb+

0.99‐1.50lbae

149

70days 24hours

Comments:ApplyFLEXSTARGT7‐14daysbeforeplanting.VeryeffectiveonPalmeramaranth(glyphosate‐resistantandALS‐resistantbiotypes)thathasnotemergedfromthesoil.Applyonlytocoarsetexturedsoils(sandyloam,loamysand, sandyclay loam).Adequate rainfall or irrigation (around0.25”)within7daysof application is required foractivation.Somecrinklingorspottingofcottonfoliageorstuntingmayoccur,especiallyifheavyrainfalloccursduringorsoonafteremergence,butplantsoutgrowtheseeffectsanddevelopnormally.TankmixwithCOTORAN,DIREX,PROWL, or STAPLE to broaden the spectrum of weed control.Rainfast interval=heavy rainfall shortlyafterapplicationmayreduceeffectiveness.ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.

FirstShot50SG(thifensulfuron+tribenuron)

0.5‐0.8oz

0.125‐0.20lb+

0.125+0.20lb

22

‐‐‐ 12hours

Comments:Apply14daysbeforeplantingcotton.Ifapplyingtolight‐texturedsoils,suchassands,loamysands,andsandyloams,waitanadditional7daystoplant.AddCOCat1galper100galsorNISat2ptper100galofspraysolutionplusnitrogenfertilizer(UANat2qt/AorAMSat2lb/A).FIRSTSHOTmaybetankmixedwith2,4‐DLVE(forimprovedcontrol of cutleaf eveningprimrose, henbit, and Carolina geranium), GLYPHOSATE, CLARITY, LIBERTY, orGRAMOXONE. If tankmixingwith 2,4‐D LVE, observe themore restrictivewaiting interval to plant (14‐30 days,dependingonrate,see2,4‐DLVEsection).Rainfastinterval=2hours.

Glyphosateacidequivalent(ae)4.5lbae/gal

22‐32floz

0.75‐1.13lbae

9

7days 4hours

Comments: Applyinaminimumof10GPAofwaterperacre14‐30dayspriortocottonplanting.Controlshenbit,ryegrass, cutleaf evening primrose andwild radish (althoughnotas effectiveasglyphosate+2,4‐DLVE). 2,4‐D orCLARITYcanbeaddedtothismixture.Rainfastinterval=heavyrainfallsoonafterapplicationmaywashproductoffofthefoliageandarepeatapplicationmaybeneededtoensureadequateweedcontrol(suggest1hour).

Goal2XL(oxyfluorfen)

1.0‐2.0pt 0.25‐0.5lb

14

75days 24hours

Comments:ApplyGOAL2XLaminimumof7daysbeforeplantingcotton.TankmixwithGLYPHOSATEorPARAQUATforcontroloflargerwinterannualbroadleafweedsorannualgrassesinfallowbeds(fallorlatewinter/earlyspringburndown).Providespostemergenceandsoilresidualcontrolofhorseweed,pigweeds,andhenbit.ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.


76

PreplantBurndownHerbicidesforWeedManagementinCotton(cont)




GramoxoneSL2S(paraquat)paraquat3S

2.0‐4.0pt

1.5‐2.0pt

0.5‐1.0lb

22

7days 12hours

Comments: GRAMOXONE isaRESTRICTEDUSEPESTICIDE.Apply inaminimumof10GPAatplanting.Controlsseedling glyphosate‐ and ALS‐resistant Palmer amaranth that have emerged since the early preplant burndowntreatment.AddNISat1qt/100galofspraymix.Rainfastinterval=30minutes.

Leadoff33.4DF(rimsulfuron+thifensufluron)

1.5oz

0.0157lb

0.0157lb

22

30days 4hours

Comments: Apply LEADOFF 30 days or more prior to planting cotton. LEADOFF tank mix partners includeGLYPHOSATE,PARAQUAT,2,4‐DLVE,DICAMBA,orGLUFOSINATE.Noadditionalsurfactantisneedediftankmixedwithglyphosateorglufosinatewithabuilt‐inadjuvantsystem.Otherwise,addNISat1qtper100galorCOCat1galper100galorMSOat0.5galper100galofspraysolutionplusanammoniumnitrogenfertilizer(AMSat2lb/AorUANat2qt/A).

Liberty280SL(glufosinate)

29‐43oz 0.53‐0.79lb

10

70days 12hours

Comments:Thoroughspraycoverageisessentialforoptimumperformance.Groundapplicationrequiresaminimumof15gallonsofwater/acre.Denseweedcanopiesrequire20to40gallonsperacre.Bestresultsobtainedwhendaytimetemps exceed 75 F. Consult label for maximum season application rates for LIBERTY (burndown + in‐seasonapplications).Rainfastinterval=4hours.

Prowl3.3EC(pendimethalin)

1.8‐3.6pt

0.75‐1.5lb

3

60days 24hours

Comments:Applyinaminimumof10GPAofwaterperacre.ApplyPROWLupto15daysbeforeplanting.PROWLmustbeactivatedbyrainfallorirrigation,preferablywithin2days.Forbestresults,applytoweedsthatarelessthan4”tall(lessthan3”rosettes).Usehigherratefortreatinglargerweeds.Denseweedorcovercropstandswillreducetheeffectivenessofresidualweedcontrol.Add2,4‐DLVEtoimprovecontrolofcutleafeveningprimroseandCarolinageranium.

Resource0.86EC(fumiclorac)

2.0‐4.0floz 0.013‐0.026lb

14

7days 12hours

Comments: Applyinaminimumof10GPAofwaterperacreanytimepriortoplanting.Forbestresults,applytoweedsthatarelessthan4”tall(lessthan3”rosettes).Usehigherratefortreatinglargerweeds.AddaCOC(1‐2gal/100gals),NIS(1qt/100gals),orMSO(1‐2gal/100gals).Add2,4‐DLVEtoimprovecontrolofcutleafeveningprimrose.Rainfast interval=heavy rainfall soonafterapplicationmaywashproductoffof the foliageanda repeatapplicationmaybeneededtoensureadequateweedcontrol(suggest1hour).


77

PreplantBurndownHerbicidesforWeedManagementinCotton(cont)




Sharpen2.85SC(saflufenacil)

1.0floz 0.022lb

14

80days 12hours

Comments:ApplySHARPENaminimumof42daysplustheaccumulationof1.0inchofrainfallorirrigationbeforeplantingcotton.AddCOCat1galper100galorMSOat1galper100galofspraysolutionplusnitrogenfertilizer(UANat2qt/AorAMSat2lb/A).IftankmixingwithGLYPHOSATE,AMSisrecommended.DonotapplySHARPENwithothergroup14(PPOinhibitors)products(i.e.,VALORORREFLEX)asatankmixorasasequentialapplicationwithin30daysorcropinjurymayresult.DonotapplytocoarsesoilsclassifiedasSANDwithlessthan1.5%organicmatterorcottoninjurymayresult.TankmixpartnersincludeCLARITY,DISTINCT,GLYPHOSATE,andPROWLH2O.Rainfastinterval=1hour.

Valor51WDG(flumioxazin)

2.0oz 0.063lb

14

21days 12hours

Comments: Applyinaminimumof10GPAofwaterperacre14‐30dayspriortocottonplanting.Controlscutleafeveningprimroseandwild radish(althoughnotaseffectiveasglyphosate+2,4‐DLVE)andprovides2‐4weeksofresidualcontrolofweedssuchasglyphosate‐andALS‐resistantPalmeramaranth.2,4‐DorCLARITYmaybetankmixedwiththismixture.Besuretofollowtheclean‐outinstructionsforremovingVALORfromthesprayeraftereachday’suse;donotletVALORsitovernightinthetank.Seebelowforpreplantburndownwaitingintervalspriortocottonplanting(Assumes2.0oz/AofValorSX):

GroundResidueAmountsCottonPlant‐BackIntervals(daysbeforeplanting)

Strip‐TillBeforeValorSX Strip‐TillfollowingValorSX

<30%residuecover 28days 7days

>30%residuecover 21days 7days

ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.

Warrant3.0ME(acetochlor)

1.25‐2.0qt 0.94‐1.5lb

15

‐‐‐ 12hours

Comments: ApplyWARRANTanytimepriortoplantingbutbeforeweedsgerminate.Providesresidualcontrolofsmallseededbroadleavesandgrasses.TheoptimumrateofWARRANTis3pt/A.Donotexceed4.0qt/AofWARRANTperseason.TankmixwithGLYPHOSATEorPARAQUATtocontrolexisitingweeds.DonotapplyACETOCHLORwithin50ftofanywellwheredepthtogroundwateris30feetorless:sandswithlessthan3%organicmatter;loamysandswithlessthan2%organicmatter;orsandyloamswithlessthan1%organicmatter.

At‐PlantPostemergenceBroadcastforGlyphosate‐ResistantPalmerAmaranth





2.0‐4.0pt

1.5‐2.0pt

0.5‐1.0lb

22

7days 12hours

Comments:PARAQUATisaRESTRICTEDUSEPESTICIDE.ApplyPARAQUATbroadcastorinabandbehindtheplanterfurrowaloneinaminimumof10GPAatplantingorafterplanting(beforecottonemerges)tankmixedwithresidualherbicides,suchasREFLEX,DIURON,WARRANT,and/orPROWLH2O.Controlsseedlingglyphosate‐andALS‐resistantPalmeramaranththathaveemergedfromanearlierpreplantburndownapplication.IncreasetherateofPARAQUATandsprayvolumeifweedsaredenseorhavesignificantsize(greaterthan4inches).AddNISat1qt/100galofspraymix.Rainfastinterval=30minutes.


78

WeedandCoverCropResponse toBurndown/PreplantHerbicides inConservationTillageCotton1

Aim/ET2

Glyphosate2

Glyphosate+2,4‐D

2

Glyphosate+Direx

2

Glyphosate+Leadoff2

Glyphosate+Sharpen

2

Glyphosate+ValorSX2

Gramoxone2

Gramoxone+2,4‐D

2

Gramoxone+Clarity

2

Gramoxone+ValorSX2

Gramoxone+Direx

2

Liberty

2

barley,little F E E E E E E G G G G G G

bluegrass,annual G F F E E E E G G G G G P

buttercups G E E E E E E E E E E E E

chickweed,common G F G GE E E E E E GE E E E

clovers P PF F F G E F G G GE GE GE F

cudweed G E E E E E E FG FG FG FG FG G

dandelion P P E GE E G G N E GE P GE FG

dock,curly P PF G F F F G F FG GE P F G

eveningprimrose,cutleaf GE PF E GE E E FG F E GE E GE G

geranium,Carolina GE FG E GE E E E GE E GE E E GE

henbit/deadnettle G F G E E E E G GE E E GE G

horseweed(marestail) G E GE E GE E GE F GE E GE GE GE

mustard,wild G FG E GE G E GE FG E G GE G GE

pansy,field G F F G ‐‐‐ E F G G G G GE G

peanut,volunteer F F F F P GE FG P F GE F F GE

pepperweed,Virginia G G E GE E E G G GE G G GE G

radish,wild G FG GE GE G E GE G GE GE GE GE GE

ryegrass,Italian F G F FG E E G FG FG FG FG G P

sorrel,red F E E E G G E E E E E E PF

spurry,corn G GE GE GE E E G FG G G G G ‐‐‐

swinecress G FG G G E E FG PF FG FG PF FG GE

vetch GE F E G E E FG G GE GE GE G GE

wheat/ryecovercrop P E E G E E E FG F F G G F1KeytoResponseRatings:E=excellentcontrol,90%orbetter;G=goodcontrol,80to90%;F=faircontrol70to80%;P=poorcontrol,lessthan70%;‐‐‐=InsufficientData.2HerbicideratesforburndownareETat1.0oz/A;Aimat2.0oz/A;Glyphosateat0.75lbae/A(22oz/Aof4.5lbae/galor32oz/Aof3.0lbai/gal);2,4‐Dat1‐2pt/A;Clarityat8oz/A;Direxat1.6pt/A;Leadoffat1.5oz/A;Sharpenat1.0oz/A;Gramoxoneat3.0pt/A;ValorSXat2.0oz/A;andLibertyat29oz/A.


79

Glyphosate‐ResistantPalmerAmaranthPrograms‐CottonPalmeramaranthpopulationshavebeendocumentedinSouthCarolinathatareresistanttoglyphosate(i.e.,Roundup,Touchown), acetolactate synthase (ALS) inhibiting herbicides (i.e., Staple, Envoke) and dinitroaniline (yellow)herbicides(i.e.,Prowl,Treflan,andSonalan).Thefollowingtableisdesignedtoaidproducersinmanagingglyphosate‐resistantandALS‐resistantPalmeramaranthpopulationsincotton.

OveruseofPPO‐inhibitors(i.e.,Valor,Reflex)couldleadtothedevelopmentofPPO‐resistantPalmeramaranthbiotypes.TheuseofoverlappingresidualherbicideswithpostemergenceherbicideswillhelppreservetheutilityofthesePPO‐inhibitorsinthenearfuture.

ManagingGlyphosate‐resistantPalmerAmaranthinRoundupReadyFlexCotton1HerbicideProgram

PreplantBurndown(PPB),PreplantIncorporate(PPI)orPreemergence(PRE)

POSTBROADCAST(1to4leaf)

POSTBROADCAST(5‐6leaf)

POST‐DIRECTED/LAYBY

HOODED

ConventionalTillageDrylandProwlorTreflanorTreflan+CotoranPPIfbReflex2PRE

glyphosate+

DualMagnumor

Warrant(noPalmeremerged)

OR

glyphosate+

StapleLX3(Palmer<2”)

glyphosate+


glyphosate

+Envoke3

(Palmer<4”)

LaybyPro+

MSMAOR

Caparol+

MSMAOR

Suprend+

MSMA

Paraquat+

DirexConventionalTillageIrrigatedReflex2+StapleLX3PREorReflex2+DirexPREorReflex2+ProwlPRE

ConservationTillageDrylandValor2,4PPBfollowedbyDirex+Warrant+ParaquatPREorValor2,4PPBfollowedbyParaquat+Reflex2+DirexPREorValor2,4PPBfollowedbyParaquat+Reflex2+WarrantPRE

ConservationTillageIrrigatedValor2,4PPBfollowedbyDirex+StapleLX3+ParaquatPREorValor2,4PPBfollowedbyParaquat+Reflex2+DiuronPRE

ManagingGlyphosate‐andALS‐resistantPalmerAmaranthinRoundupReadyFlexCotton1HerbicideProgram

PreplantBurndown(PPB),PreplantIncorporate(PPI)orPreemergence(PRE)

POSTBROADCAST(1to4leaf)

POSTBROADCAST(5‐6leaf)

POST‐DIRECTED/LAYBY

HOODED

ConventionalTillageDrylandProwlorTreflanorTreflan+CotoranPPIfollowedbyReflex2+WarrantorWarrant+DirexPRE

glyphosate+

DualMagnumor


glyphosate+


LaybyPro+

MSMAOR

Caparol+

MSMAOR

Suprend+

MSMA

Paraquat+

Direx

Paraquat+

Caparol

ConventionalTillageIrrigatedReflex2+DirexPREorReflex2+ProwlPRE

ConservationTillageDrylandValor2,4PPBfollowedbyDirex+Warrant+ParaquatPREorValor2,4PPBfollowedbyParaquat+Reflex2+DirexPREorValor2,4PPBfollowedbyParaquat+Reflex2+WarrantPRE

ConservationTillageIrrigatedValor2,4PPBfollowedbyDirex+Warrant+ParaquatPREorValor2,4PPBfollowedbyParaquat+Reflex2+DiuronPRE1Handweeding,cultivation,and/orapplicationofparaquatmixtureswithhoodedsprayerswilllikelybeneeded.2MakeonlyoneapplicationofReflexorValorduringthegrowingseasonforresistancemanagement.3MakeonlyoneapplicationofanALS‐inhibitingherbicide (Staple,Envoke,Suprend)pergrowingseason. WillnotcontrolALS‐resistantPalmeramaranth.4SeeValorSXinthepreplantburndowndiscussionforintervalbetweenapplicationandplantingwithastrip‐tillplanter.


80

ManagingGlyphosate‐resistantPalmerAmaranthinLiberty‐LinkCotton1HerbicideProgram

PreplantBurndown(PPB)orPreemergence(PRE) POSTBROADCAST(1‐4leaf)

POSTDIRECTED(5‐6leaf)

LAYBY HOODED

ConventionalTillageReflex2+DirexorProwlorStapleLXPREorStapleLX3+DirexorProwlPRE

Liberty4+

DualMagnumOR

Warrant(Palmer<4”)

OR

Liberty4+

StapleLX3(Palmer<4”)

Liberty4+

Warrant

(Palmer<4”)

LaybyPro+MSMA

OR

diuron+Valor2+MSMA

OR

diuron+MSMA

ConservationTillageValor2,5PPBfollowedbyParaquat+Direx+WarrantPREorValor2,5PPBfollowedbyParaquat+Reflex2+DirexPREorValor2,5PPBfollowedbyParaquat+Reflex2+WarrantPRE

1Handweeding,cultivation,and/orapplicationofparaquatmixtureswithhoodedsprayerswilllikelybeneeded.2MakeonlyoneapplicationofReflexorValorthroughoutthegrowingseasonforresistancemanagement.3Makeonlyoneapplicationof anALS‐inhibitingherbicide (Staple,Envoke,Suprend)pergrowingseason. WillnotcontrolALS‐resistantPalmeramaranth.4LibertywillnotconsistentlycontrolPalmeramaranthlargerthan4”tall.5SeeValorSXinthepreplantburndowndiscussionforintervalbetweenapplicationandplantingwithastrip‐tillplanter.


81

WeedResponsetoSoilAppliedCottonHerbicides1 PREPLANT

INCORPORATEDPREEMERGENCE

Prowl

Treflan

BrakeF16

Command

Cotoran

Direx

Prowl

Reflex

StapleLX

Warrant

anoda,spurred P P ‐‐‐ GE F F P ‐‐‐ E ‐‐‐barnyardgrass E E E E G G G P FG GEbeggarweed,Florida P P ‐‐‐ FG GE G P P G Pbermudagrass P P P PF P P P P P Pcitronmelon P P P P FG F P P FG Pcocklebur,common P P P F GE P P G P Pcowpea P P P P P P P P FG Pcrabgrass E E E E FG FG G FG P Ecrotolaria,showy P P P G G G P P FG Pcroton,tropic P P G P G F P FG P ‐‐‐crowfootgrass E E E E FG FG G ‐‐‐ ‐‐‐ Edayflower,Benghal P P ‐‐‐ P G P P P P ‐‐‐eclipta P P ‐‐‐ G G G P GE G Pgoosegrass E E E E F F G ‐‐‐ PF Ejimsonweed P P E G G G P ‐‐‐ FG Pjohnsongrass,seedling E E E G P P G ‐‐‐ FG Pjohnsongrass,rhizome P P P P P P P P P Plambsquarters,common GE GE E G E E G E FG Fmorninggloryspp. P P F P G F P PF F Pnutsedge,purple P P P P P P P ‐‐‐ P Pnutsedge,yellow P P P P P P P GE P Fpanicum,fall G G E E F P F ‐‐‐ PF Epanicum,Texas P P E G P P F F P PFpigweedspp.ALS‐resistantDNA‐resistant

GGP

GEGEP

EEE

PPP

GEGEGE

GEGEGE

FFP

EEE

GEPGE

GEGEGE

poinsettia,wild P P ‐‐‐ G P P P GE G Ppurslane,common E E E GE E F G G G Gpusley,Florida E E E GE G F G P P GEragweed,common P P F GE E G P G P PFredweed(chocolateweed) P P F GE E GE P G GE Pryegrass,annual E E E GE G G G P P Gsandbur E E E G G G G ‐‐‐ ‐‐‐ FGsenna,coffee P P FG P GE P P P G Psesbania,hemp P P FG G P P P P P Psicklepod P P FG P G F P P PF Psida,prickly P P G E G F P ‐‐‐ PF Psignalgrass,broadleaf G G E E P P G FG P Gsmartweed,Pennsylvania P P FG G G G P ‐‐‐ G PFspurge P P G P P F P G G Fstarbur,bristly GE GE F P GE G P GE FG PFvelvetleaf P P G E F PF P P E Pvol.peanuts P P P F P P P P P P1KeytoResponseRatings:E=excellentcontrol,90%orbetter;G=goodcontrol,80to90%;F=faircontrol,70to80%;P=poorcontrol,lessthan70%;‐‐‐=InsufficientData.2


82

PreplantIncorporatedHerbicidesforWeedManagementinCotton

HerbicideRate/AcreBroadcast Modeof

ActionPreharvestInterval


Prowl3.3EC(pendimethalin)ProwlH2O3.8CS

1.0‐2.0pt

2.0‐4.0pt

0.5‐1.5lb

0.95‐1.9lb

3

21days 24hours

Comments:ApplyPROWLupto60daysbeforeplantingandincorporate.Controlsannualgrassesandsomesmall‐seeded broadleaf weeds, seedling johnsongrass; poor control of large‐seeded broadleaf weeds (i.e., annualmorningglory,cocklebur,sicklepod).Formaximumpigweedcontrol,use2.0pt/Aapplicationrate.Usethelowerrateifasequentialapplicationofpendimethalinisplannedatplanting.Incorporatetoadepthof2to3inchesimmediatelyafterapplication.Crossdiskforbestresults.Applicationwithinaweekofplantingisrecommended.NOTE: If your field(s)have ahistory ofpoorPalmeramaranth controlwith yellow herbicides (PROWL,TREFLAN,SONALAN), a follow‐up preemergence herbicide (i.e. DualMagnum,Warrant) will be needed at planting or earlypostemergence.

Treflan4HFP(trifluralin)

1.0‐2.0pt 0.5‐1.0lb

3

60days 12hours

Comments:Controlsannualgrassesandsomesmall‐seededbroadleafweeds,seedlingjohnsongrass;poorcontroloflarge‐seeded broadleaf weeds (i.e., annual morningglory, cocklebur, sicklepod). Use 2.0 to 3.0 pt/A for rhizomejohnsongrasscontrol.Forenhancedpigweedcontrol,use1.5pt/Aoncoarse‐texturedsoilsand2.0pt/Aonmedium‐textured soils. Incorporate to a depth of 2 to 3 inches immediately after application. Cross disk for best results.Applicationwithinaweekofplantingisrecommended.NOTE: If your field(s)have ahistory ofpoorPalmeramaranth controlwith yellow herbicides (PROWL,TREFLAN,SONALAN),a follow‐uppreemergenceherbicide (i.e.DUALMAGNUM,WARRANT)willbeneededatplantingorearlypostemergence.

Treflan4HFP(trifluralin)+Cotoran4F(fluometuron)

1.0‐2.0pt

1.0‐2.0qt

0.5‐1.0lb

1.0‐2.0lb

37

90days 12hours

Comments: Controls annual grasses andbroadleafweeds, seedling johnsongrass;COTORAN improves control oflarge‐seededbroadleafweeds(i.e., annualmorningglory, cocklebur, sicklepod).Seeabove forsoil textureandratediscussiononTREFLAN.UselowerrateofCOTORANoncoarsetexturedsoils.Incorporatetoadepthof2to3inchesimmediatelyafterapplication.Crossdiskforbestresults.Applicationwithinaweekofplantingisrecommended.


83

PreemergenceHerbicidesforWeedManagementinCotton




BrakeF162.7SC(fluridone+fomesafen)

16floz 0.15lb+

0.1875lb

1214

None 24hours

Comments:VeryeffectiveonPalmeramaranth (glyphosate‐resistantandALS‐resistantbiotypes), crabgrass,pricklysida,andcrowfootgrass.ApplyBRAKEF16within36hoursofplanting.Donotapplymorethan16flozperacreperapplication.DryweatherfollowingapplicationofBRAKEF16willreduceitseffectivenessonPalmeramaranth.Applyan early postemergence herbicide, such asglyphosate or LIBERTYplus a residual herbicide (i.e., DUALMAGNUM,STAPLE,orWARRANT)within12to16daysafterBRAKEF16application.

Command3ME(clomazone)

2.0‐3.33pt 0.75‐1.25lb

13

65days 12hours

Comments: Controlscrabgrass, fallpanicum,crowfootgrass,Texaspanicum,velvetleaf,spurredanoda,andpricklysida.Providesonlymarginal suppressionofmostotherbroadleafweeds (i.e.,Palmeramaranth).Maybe tankmixwithotherherbicides tobroadenweedspectrum.DonotapplyCOMMANDtocottonunlessdisulfotonorphorateorganophosphateinsecticideisappliedin‐furrowwiththeseedatplantingtimeataminimumof0.75lbofactiveingredientperacre.Donotreduce the application rate of the organophosphate insecticide when COMMAND is applied as a band treatment.Combinations of at‐planting systemic granular carbamate and organophospate insecticides applied in conjunctionwithCOMMANDmayresultininjurytocotton.CropinjurymayoccurwithhigherratesofCOMMANDonsandysoils.DIURONisnotrecommendedatplantingwhenCOMMANDisusedasplantinjurymayresult.Donotapplyintheairorwithin1200ftof housing developments, commercial fruit, vegetable, or nut production; or commercial ornamental nurseries orgreenhouses.Donotapplymorethan1.25lbaiperacreperseason.Donotallowliverstocktograzeontreatedcottonforageortrash,orfeedtreatedcottonforageortrashtolivestock.

Cotoran4F(fluometuron)

2.0‐4.0pt 1.0‐2.0lb

7

60days 24hours

Comments: Controls Palmer amaranth (includingALS‐andglyphosate‐resistant), sandbur, crabgrass, tropic croton, andcoffeesenna.TankmixwithSTAPLELXforimprovedcontrolofspurredanodaandvelvetleaf.Forimprovedpigweedcontrol,particularlyinconservationtillage,REFLEXmaybeappliedincombinationwithCOTORANpreemergence.CottoninjurymaybeobservedwhenCOTORANisappliedincombinationwithasystemicinsecticideatplanting.Inaddition,COTORANappliedwithCOMMANDmayresultincottoninjury.Usethelowerendoftheraterangeonlightersoils.

Direx4L(diuron)

0.8qt 0.8lb

7

90days 12hours

Comments:ControlsPalmeramaranth(includingALS‐andglyphosate‐resistant),commonragweed,andbristlystarbur.Donotapplywheresoil‐appliedorganophosphateinsecticidewasusedasseverecropinjuryandstandlosswilloccur.SeedlingdiseasesmayweakencottonplantsandincreasethepossibilityofinjuryfromtheuseofTRIFLURALINproductsfollowedbyDIREX.ThesetreatmentsshouldonlybeusedinconjunctionwithastandardfungicideseedtreatmentplusasupplementalsoilfungicideprogramsuchasCAPTAN‐PCNBmixture.Donotapplytosandsorsandyloamsoilswithorganicmatterlessthan1.0%.

FlexstarGT3.52.82EC(fomesafen+glyphosate)

3.5‐5.3pt 0.25‐0.37lb

+0.99‐1.50lbae

149

70days 24hours

Comments:VeryeffectiveonPalmeramaranth(glyphosate‐resistantandALS‐resistantbiotypes)thathasnotemergedfromthesoil.Applyonlytocoarsetexturedsoils(sandyloam,loamysand,sandyclayloam).Adequaterainfallorirrigation(around0.25”)within7daysofapplicationisrequiredforactivation.Somecrinklingorspottingofcottonfoliageorstuntingmayoccur, especially if heavy rainfall occurs during or soon after emergence, but plants outgrow these effects and developnormally.TankmixwithCOTORAN,DIREX,PROWL,orSTAPLEtobroadenthespectrumofweedcontrol.ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.


84

PreemergenceHerbicidesforWeedManagementinCotton(cont)




ProwlH2O3.8CS(pendimethalin)Prowl3.3EC

1.0‐2.0pt

1.2‐2.4pt

0.48‐0.95lb

0.50‐0.99lb

3

60days 24hours

Comments: Controls Palmer amaranth (glyphosate‐ andALS‐resistant biotypes), common lambsquarters, Floridapusley,andcrabgrass.Applyatplantingorupto2daysafterplanting.Note:IfyourfieldhasahistoryofpoorPalmeramaranthcontrolwithyellowherbicides,considertankmixingPROWLwithCOTORAN,REFLEX,orSTAPLE.

Reflex2EC(fomesafen)Dawn2EC

12‐16floz 0.1875‐0.25lb

14

70days 24hours

Comments:VeryeffectiveonPalmeramaranth(glyphosate‐resistantandALS‐resistantbiotypes).Applyonlytocoarsetexturedsoils(sandyloam,loamysand,sandyclayloam).Adequaterainfallorirrigationwithin7daysofapplicationisrequiredforactivation.Somecrinklingorspottingofcottonfoliageorstuntingmayoccur,especiallyifheavyrainfalloccursduringorsoonaftercottonemergence,butplantsoutgrowtheseeffectsanddevelopnormally.TankmixwithCOTORAN,DIREX,PROWL,orSTAPLEtobroadenthespectrumofweedcontrol.ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.

StapleLX3.2SL(pyrithiobac)

1.7‐2.1floz 0.0425‐0.0525lb

2

60days 4hours

Comments:ControlsPalmeramaranth(glyphosate‐resistantbiotypes),spurredanoda,andvelvetleaf.Plantstressesfrom cool temps, thrips damage, or excessive soil moisture may cause temporary leaf yellowing or stunting. Asconditions improve, cottonwill recover.Donotuseon soilswhereorganicmatter is less than0.5%oron coarsetexturedsoils(sandsorloamysands).DonotapplymorethanonepreemergenceapplicationofSTAPLEperyear.TankmixwithPROWLforimprovedgrasscontrol.ResistanceManagement:Makeonlyoneapplicationofagroup2containingherbicidepergrowingseason.


1.25‐2.0qt 0.94‐1.5lb

15

‐‐‐ 12hours

Comments:Providesresidualcontrolofsmallseededbroadleavesandgrasses.Applyafterplantingbutbeforeweedsgerminate.TheoptimumrateofWARRANTis3pt/A.Donotexceed4.0qt/AofWARRANTperseason.TankmixwithGLYPHOSATEorPARAQUATtocontrolweedsthathavegerminatedsinceplanting.Environmentalconditions thatfollowapplicationofWARRANTincludingcold,wetsoilsorwaterloggedconditionfromexcessiverainmayresultincropinjury.DonotapplyACETOCHLORwithin50ftofanywellwheredepthtogroundwateris30feetorless:sandswithlessthan3%organicmatter;loamysandswithlessthan2%organicmatter;orsandyloamswithlessthan1%organicmatter.


85

WeedResponsetoPostemergenceBroadcastCottonHerbicides1

AssureII

Cotoran

EnlistDuo4

Envoke

Envoke+Staple

FusiladeDX/Fusion

Glyphosate2

Glyphosate+DualMag.2

Glyphosate+Envoke2

Glyphosate+Prowl2

Glyphosate+Staple

2

Glyphosate+Warrant2

Liberty

3

Liberty+DualMag.3

Liberty+Prowl3

Liberty+Warrant3

MSM

A

Poast/PoastPlus

Select/SelectM

AX

Sequence

2

Staple

anoda,spurred P ‐‐‐ E P G P GE GE E GE E GE P P P P P P P GE Gbarnyardgrass G G E ‐‐‐ ‐‐‐ G E E E E E E G G G G F GE GE E ‐‐‐beggarweed,Florida P G E GE GE G E E E E E E G G G G E P P E Gbermudagrass G P F P P G F F FG F FG F P P P P P F G F Pcitronmelon P G GE GE GE P GE GE E GE E GE G G G G PF P P GE ‐‐‐cocklebur,common P FG E GE G P E E E E E E E E E E E P P E Gcowpea P FG E G GE P E E E E E E G G G G F P P E ‐‐‐crabgrass G PF E P P G E E E E E E FG G G FG F GE GE E Pcrotolaria,showy P G E ‐‐‐ ‐‐‐ P G G G G G G G G G G F P P G ‐‐‐croton,tropic P FG E PF PF P E E E E E E G G G G F P P E Pcrowfootgrass G PF E F P F E E E E E E G G G GE F FG G E Pdayflower,Benghal P P G F F P FG G G FG G FG FG G FG FG P P P FG Peclipta P ‐‐‐ E P FG P E E E E E E G G G G ‐‐‐ P P E Ggoosegrass G PF E P P G E E E E E E FG G G FG F GE GE E Pjimsonweed P G E P GE P E E E E E E E E E E P P P E Ejohnsongrass,seedling E P E FG FG GE E E E E E E G G G GE F GE E E Pjohnsongrass,rhizome E P GE PF PF GE GE G GE E GE E P P P P P G GE E Plambsquarters,common P G GE G GE P G G E G G G E G G G P P P E Pmorninggloryspp. P G E G G P G G E G G G E E E E F P P G Gnutsedge,purple P P F FG FG P F F G F FG FG P P P P F P P FG PFnutsedge,yellow P P FG G G P FG FG GE FG FG F P P P P FG P P F PFpanicum,fall GE PF E P P GE E E E E E E G G GE GE F E E E Ppanicum,Texas G P E P P G E E E E E E G G GE GE P E E E Ppigweedspp.glyphosate‐resistantALS‐resistant

PPP

PFPFPF

EGEGE

PFPFP

FFP

PPP

EPE

EPE

GPE

EPE

EEE

EPE

GGG

GGG

GGG

GGG

PPP

PPP

PPP

EPE

GGP

poinsettia,wild P F GE G G P G G E G GE E GE GE GE GE N P P G Fpurslane,common P FG G ‐‐‐ ‐‐‐ P F F G F G F FG FG FG FG P P P G Fpusley,Florida P PF FG P P P F F PF FG PF FG P P G PF P P P FG Pragweed,common P G E G G P E E E E E E E E E E P P P E FGredweed(chocolateweed) P FG G ‐‐‐ ‐‐‐ P G G G G G G E E E E P P P G ‐‐‐ryegrass,annual G P E ‐‐‐ ‐‐‐ G E E E E E E FG FG FG FG GE G G E ‐‐‐sandbur,field G PF E ‐‐‐ P G E E E E E E G G GE GE F G G E Psenna,coffee P FG E ‐‐‐ GE P E E E E E E GE GE GE GE P P P E GEsesbania,hemp P FG G ‐‐‐ GE P F F ‐‐‐ ‐‐‐ GE ‐‐‐ G G G G P P P ‐‐‐ GEsicklepod P FG E E E P GE GE E GE GE GE E E E E F P P E PFsida,prickly P FG E P F P E E G E G E G G G G P P P E Fsignalgrass,broadleaf G P E P P GE E E E E E E G G GE GE F E E E Psmartweed,Pennsylvania P FG E G G P GE GE E GE E GE GE GE GE GE P P P GE Gspurge,annual P F E ‐‐‐ ‐‐‐ P G G G G G G FG FG FG FG P P P G FGstarbur,bristly P G E GE GE FG E E E E E E GE GE GE GE P P P E GEvelvetleaf P G E G G P GE GE E GE E GE G G G G P P P GE Gvol.cornRRhybridsRR+LLhybrids

GGG

PPP

EPP

PPP

PPP

EEE

EPP

EPP

EPP

EPP

EPP

EPP

FFP

FFP

FFP

FFP

PPP

EEE

GEGEGE

EPP

PPP

vol.peanuts P F F PF PF P F F F F F F GE E GE GE P P P F P1KeytoResponseRatings:E=excellentcontrol,90%orbetter;G=goodcontrol,80to90%;F=faircontrol,70to80%;P=poorcontrol,lessthan70%;‐‐‐=InsufficientData.2Useonlyonglyphosate‐tolerant(Gly‐TolorRoundupReady[RR]Flex)cottonvarieties.3Useonlyonglufosinate‐tolerant(LibertyLink[LL])cottonvarieties.4Useonlyon2,4‐Dcholine‐tolerant(Enlist)cottonvarieties.


86

PostemergenceBroadcastHerbicidesforWeedManagementinCotton(cont)

Herbicide

Rate/AcreBroadcast

ModeofAction

PreharvestInterval

RestrictedEntryIntervalFormulation

ActiveIngredient

AssureII0.88E(quizalofop)

5‐12floz 0.034‐0.069lb

1

80days 12hours

Comments: ApplyASSURE at 7‐8 oz/A over‐top to control annual grasses up to 6” tall. Apply 5 oz/A to controlvolunteerRR‐cornincotton.Forcontrolofrhizomejohnsongrass,apply5ozofAssureIIwhenjohnsongrassis10‐24"tallandthenretreatwith5ozwhenregrowthreaches6‐10"tall.Forbermudagrasscontrol,apply10‐12oz/Aat3”tall(upto6”runners).AddCOCat1gal/100gallonsor1qt/100gallonsofspraymixture.Applicationintervalsshouldbe7daysaparttoallowforregrowth.Donotexceed18oz/Ainagrowingseason.Rainfastinterval=1hour.

Cotoran4L(fluometuron)

2.0‐2.5pt 1.0‐1.25lb

7

60days 24hours

Comments:ApplyCOTORANtocottonafterreaching3inchesinheight.Controlsglyphosate‐andALS‐resistantPalmeramaranth(lessthan2inchestall)andannualmorningglory(lessthan3inchestall).Addsurfactantat2qt/100galofspraysolution.TankmixpartnersmayincludeMSMA,PARALLELPCS,PYRIMAXRainfastinterval=2hours.

DualMag.7.62EC(s‐metolachlor)ParallelPCS8.0EC(metolachlor)

1.0‐1.33pt 0.95‐1.27lb

15

100days 24hours

Comments: ApplyMETOLACHLORatwhencottonis3to6 inchestall.DUALMAGNUMdoesnotcontrolemergedweeds,butwillprovideresidualcontrolofannualgrasses,pigweeds,andsuppressionofyellownutsedge.TankmixwithMSMA,GLYPHOSATE(ROUNDUPREADYFLEX)orLIBERTY(LIBERTY‐LINK)forcontrolofemergedweeds.Donotapplytosandorloamysandsoils.Rainfastinterval=none.

Envoke75WDG(trifloxysulfuron)

0.10‐0.15oz 0.0046‐0.0069

lb

2

60days 12hours

ApplyENVOKEto5‐leaforgreatercottonforcontrolofpigweed,annualmorningglory,andyellownutsedge.WeakonPalmeramaranth.AddNIS(aminimumof80%surfaceactive)at1qt/100galofspraysolution.Donotapplywithanyotheradditiveorgrowthregulatorasunacceptableinjurymayoccur.TankmixwithSTAPLEforenhancedsmallflowermorningglorycontrol.Donotapplyasapreemergenceassubstantialcottoninjurywillresult.Rainfastinterval=3hours.ResistanceManagement:Makeonlyoneapplicationofagroup2containingherbicidepergrowingseason.

FusiladeDX2EC(fluazifop‐p‐butyl)

8‐12floz 0.125‐0.188lb

1

90days 12hours

Comments: Controlsannualandperennialgrassesbeforetheyexceed6‐8"tall.Forrhizomejohnsongrasscontrol,apply12oz/Awhenitis8‐18"tall.Makeasecondapplication(8oz/A)whenregrowthis6‐12"tall.Forbermudagrass,apply12oz/Awhenrunnersare4‐8"long,and8oz/Awhenre‐growthreaches4‐8".AddCOCat1gal/100gallonorNIS2pt/100galofspraysolution.ControlsvolunteerRR‐cornincotton.Donotapplyafterbollset.Doapplymorethan48oz/Aperorwithin90daysofharvest.Rainfastinterval=1hour.


87


Herbicide

Rate/AcreBroadcastModeofAction

PreharvestInterval

RestrictedEntryIntervalFormulation Active

Ingredient

Fusion2.56EC(fluazifop‐p‐butyl+fenoxaprop‐p‐ethyl)

8‐12oz 0.16‐0.24lb

11

90days 24hours

ApplyFUSIONat8oz/Aforcontrolofmostannualgrassesbeforetheyexceed6‐8"tall.Forrhizomejohnsongrass,apply10‐12oz/Aforcontrolofjohnsongrass8‐18"tall.Asecond8oz/Atreatmentmaybeappliedtocontrolregrowth6‐12"tall.Forbermudagrass,treat4‐8"runnerswith12oz/A,andthenapplyasecondapplicationof8oz/Ato4‐8"re‐growth.AddCOCat1gal/100orNISat2pt/100gallonofspraysolution.ControlsvolunteerRR‐cornincotton.Rainfastinterval=1hour.

Glyphosateacidequivalent(ae)4.5lbae/gal

22‐32floz

0.75‐1.12lbae

9 7days 4hours

Comments: USEONLYONCOTTONVARIETIESDESIGNATEDASGLY‐TOLORROUNDUPREADYFLEX!ApplyGLYPHOSATEat0.75to1.12lbae/Aover‐the‐topfromgroundcrackingupto7daysbeforeharvest.Controlsannualgrassesandbroadleaves.Ingeneral,thefirstover‐the‐topbroadcastapplicationshouldbeappliedearlytominimizeweedcompetition(1to3”tallweeds).Norestrictiononthetimingofsequentialtreatments.TankmixwithSTAPLE,DUALMAGNUM, orWARRANT for residual control ofweeds. Aerial application rates are limited to 0.75 lb ae/A.Maximumcombined totalofallapplications fromemergence throughharvestcannotexceed4.5 lbae/A.Rainfastinterval=2hours.ResistanceManagement: Glyphosate‐resistant Palmer amaranth is spreading rapidly throughout South Carolina.Continuedrelianceonglyphosate‐onlyprogramswillenhanceselectionandspreadofresistantbiotypes. Tankmixingglyphosatewithotherchemistriesmustbeutilized.BiotypesofPalmeramaranthresistanttobothALS‐andglyphosatechemistrieshavebeenconfirmedinSouthCarolina.

Liberty2.34SL(glufosinate)Interline2.34SL

29‐43floz 0.53‐0.79lb

10

70days 12hours

Comments:USEONLYONCOTTONVARIETIESDESIGNATEDASLIBERTY‐LINK!ApplyLIBERTY/INTERLINEinaminimumof15GPAusingflatfannozzlesat30‐60PSIfromemergenceuptothebloomgrowthstage.SpraycoverageisessentialformaximumLIBERTY/INTERLINEperformance.Controlsannualgrasses,broadleafweeds,andALS‐andglyphosate‐resistantPalmeramaranth(lessthan4”tall).Uptothreeover‐the‐topapplications(donotexceed36oz/Aperapplication)spacedapartby10‐14daysmaybemade,butdonotexceed87oz/Apergrowingseason.AddAMSat3lb/Atothespraysolution.TankmixwithSTAPLEorDUALMAGNUMforresidualweedcontrol.DonotapplyLIBERTYin conjunction with grass herbicides (i.e., SELECT, FUSILADE, or POAST). Applications of postemergence grassherbicidesandLIBERTY/INTERLINEshouldbeseparatedbyatleast5days.Donotgrazethetreatedcroporcutforhay.Rainfastinterval=4hours.ResistanceManagement:DonotrelysolelyonGLUFOSINATEforcompleteweedcontrolincotton.Tankmixaresidualherbicide(s)ateachGLUFOSINATEapplication.Soilresidualherbicidesatburndownandatplantingwillhelpensureoptimumweedmanagementparticularlyifenvironmentalconditionsdelaytimelysprayeroperations.Residualherbicidesthroughtoutthegrowingseasonareakeycomponentofgoodweedresistancestrategies.


88





MSMA6.6(MSMA)MSMA6Plus

2.4pt

2.66pt

2.0lb

17

‐‐ 12hours

Comments:ApplyMSMAover‐the‐top cotton from3‐leaf (3 inches)up toearly first square stage (about6 inchcotton),whichevercomesfirstusinggroundequipment.Slightburningandareddishcolorationofthecottonleavesmayoccurfollowingapplication,butplantwilldevelopnormally.Onlyoneapplicationisallowedperseason(at2lbai/A),exceptwhereasalvageoperation isneeded(i.e.,Palmeramaranthescapesthe firstapplication).Asecondrepeatsalvagetreatmentshouldbetimed1to3weeksafterfirstapplication.Donotmakemorethantwoapplicationsperseasonwithaseasonalmaximumof4lbaiperacreperseason.Donotapplywithin50ftofpermanentwaterbodies or aquatic habitat including, but not limited to lakes, reservoirs, rivers, streams, marshes, ponds, andestuaries.Applyonlywhenconditionsdonotfavordriftontoadjacentcrops.Donotfeedfoliagetolivestockorgrazetreatedareas.Donotapplyafterfirstbloom.

Poast1.5E(sethoxydim)PoastPlus1E

1.0‐1.5pt

1.5‐2.25pt

0.19‐0.28lb

1

75days 12hours

Comments: ApplyPOAST/POASTPLUSanytimeduringcropgrowthbeforeannualgrassesexceed4‐6"tall. Forrhizomejohnsongrass,apply1.5pt/A(2.25pt/APOASTPLUS)upto25"tall.Asecond1.0pt/A(1.5pt/APOASTPLUS)treatmentmaybeappliedtocontrolregrowthupto12"tall.Forbermudagrass,treat6"runnerswith1.5pt/A(2.25pt/APOASTPLUS),andthenapplyasecondapplicationof1.0pt/A(1.5pt/APOASTPLUS)to4"re‐growth.Add1pt/AofDASHHCorSUNDANCEHCadjuvantorCOC2pt/A.IncludeUANat4‐8pt/AorAMSat2.5lb/Aforenhanced crabgrass activity. Consult label for tankmix partners. Controls volunteer corn in cotton.Rainfastinterval=1hour.

ProwlH2O3.8CS(pendimethalin)Prowl3.3EC

1.0‐2.0pt

1.2‐2.4pt

0.48‐0.95lb

0.50‐0.99lb

3

60days 24hours

Comments: ApplyPROWLbroadcast postemergence over the top after cotton reaches the 4‐ to 5‐leaf stage ofgrowth,butnotafterthe8‐leafstageofgrowth.Overthetopapplicationsmadebeforethe4‐leafstageorafterthe8‐leafstageofdevelopmentmayresultincropinjuryand/oryieldloss.Ifatimelyirrigationfollowsorrainoccursafter application,PROWLprovides residual controlofPalmeramaranth (glyphosate‐andALS‐resistantbiotypes),commonlambsquarters,Floridapusley,andcrabgrass.PostemergenceapplicationsofPROWLmaycausetemporarygrowthreductionand/orleafdiscolorationormalformationofcottonfollowingapplication.Note: If your field hasahistory of poorPalmer amaranth controlwith yellowherbicides, consider an alternativepostemergenceresidualherbicide,suchasWARRANTorDUALMAGNUM.


89





ProwlH2O3.8CS(pendimethalin)Prowl3.3EC+Glyphosateacidequivalent(ae)4.5lbae/gal

1.0‐2.0pt

1.2‐2.4pt

22‐32floz

0.48‐0.95lb

0.50‐0.99lb

0.75‐1.12lbae

39

60days 24hours

Comments:USEONLYONCOTTONVARIETIESDESIGNATEDASROUNDUPREADYFLEX!ApplyPROWLbroadcastpostemergenceoverthetopaftercottonreachesthe4‐to5‐leafstageofgrowth,butnotafterthe8‐leafstageofgrowth.Overthetopapplicationsmadebeforethe4‐leafstageorafterthe8‐leafstageofdevelopmentmayresultincropinjuryand/oryieldloss.ControlsPalmeramaranth(glyphosate‐andALS‐resistantbiotypes),commonlambsquarters,Floridapusley, andcrabgrass. PostemergenceapplicationsofPROWLmaycause temporarygrowth reduction and/or leafdiscolorationormalformationofcottonfollowingapplication.Note:IfyourfieldhasahistoryofpoorPalmeramaranthcontrolwithyellowherbicides,consideranalternativepostemergenceresidualherbicide suchasWARRANTorDUALMAGNUM.

ProwlH2O3.8CS(pendimethalin)Prowl3.3EC+Liberty280SL2.34S(glufosinate)

1.0‐2.0pt

1.2‐2.4pt

29‐43floz

0.48‐0.95lb

0.50‐0.99lb

0.53‐0.79lb

310

70days 24hours

Comments: USE ONLY ON COTTON VARIETIES DESIGNATED AS LIBERTY‐LINK! Apply PROWL broadcastpostemergenceoverthetopaftercottonreachesthe4‐to5‐leafstageofgrowth,butnotafterthe8‐leafstageofgrowth.Overthetopapplicationsmadebeforethe4‐leafstageorafterthe8‐leafstageofdevelopmentmayresultincropinjuryand/oryieldloss.ControlsPalmeramaranth(glyphosate‐andALS‐resistantbiotypes),commonlambsquarters,Floridapusley, andcrabgrass. PostemergenceapplicationsofPROWLmaycause temporarygrowth reduction and/or leafdiscolorationormalformationofcottonfollowingapplication.Note:IfyourfieldhasahistoryofpoorPalmeramaranthcontrolwithyellowherbicides,consideranalternativepostemergenceresidualherbicide suchasWARRANTorDUALMAGNUM.

Select2EC(clethodim)SelectMAX0.97EC

6.0‐16.0oz

9.0‐32.0oz

0.094‐0.25lb

0.068‐0.24lb

1

70days 24hours

Comments: ApplySELECT/SELECTMAXanytimeduringcropgrowthbeforeannualgrassesexceed4‐6"tall. Forrhizomejohnsongrass,apply8oz/A(12‐14oz/ASELECTMAX)upto24"tall.Asecond6oz/A(6‐18oz/ASELECTMAX)treatmentmaybeappliedtocontrolregrowth.Forbermudagrass,treat6"runnerswith8oz/A(16oz/ASELECTMAX), andapply8oz/A (16oz/ASELECTMAX) to6" re‐growth.AddCOCat1qt/AplusAMSat2.5‐4.0 lb/A forenhancedjohnsongrassandvolunteercornactivity.Rainfastinterval=1hour.


90





Sequence5.25L(glyphosate+s‐metolachlor)

2.5pt

0.75lbae

+0.94lb

915

50days 24hours

Comments: USEONLYONCOTTONVARIETIESDESIGNATEDASROUNDUPREADYFLEX!Apply2.5pt/Aover‐the‐topfromcotyledonstageupto10‐leafstage.Donotapplyafterthe10‐leafstageofcottondevelopmentassevereinjury, including yield loss,mayoccur. Controls annual grasses andbroadleaves. In general, the first over‐the‐topbroadcastapplicationshouldbeappliedearlytominimizeweedcompetition(1to3”tallweeds).DonotaddAMSorotheradjuvants.Thiscombinationprovidesresidualcontrolofannualgrasses,pigweeds,Floridapusley,dayflower,and suppressionof yellownutsedge.Donot exceed 3.5 pt/Aper season.Do not tankmixwith STAPLE.Rainfastinterval=2hours.

StapleLX3.2SL(pyrithiobac)

1.3‐3.8floz

0.033‐0.095lb

2

60days 4hours

Comments: ApplySTAPLEover‐the‐toporpost‐directedbeginningat the first true leafstageofcottontocontrolcocklebur,pigweed,andannualmorningglory.FairtogoodperformanceonPalmeramaranth(lessthan2”tall).Forheavilyinfestedfieldwithglyphosate‐resistantPalmeramaranth,applySTAPLEat2.6oz/A.AddNISat1qt/100galofspraysolution.Maycausetemporaryleafyellowing,bronzing,orcrinklingparticularlyundercoolconditions.Atotalof5.1oz/Amaybeappliedperseason.Allowaminimumof7daysbetweenapplications.STAPLEmaybetank‐mixedwithmost insecticides approved for use on cotton. Do not tankmixwith any DUAL product. DUAL and STAPLEapplicationsshouldbespacedapartbyat least5days.Donottank‐mixwithmalathion‐containing insecticides.Toavoid injury, MALATHION insecticide application should be made at least 24 hours before or after a STAPLEapplication.Rainfastinterval=4hours.ResistanceManagement:Makeonlyoneapplicationofagroup2containingherbicidepergrowingseason.


3pt 1.125lb

15

‐‐‐ 12hours

Comments:ApplyWARRANTover‐the‐topfromemergenceuntilcottonreachesfirstbloom.Providesresidualcontrolofsmallseededbroadleavesandgrasses.Optimumapplicationtimingforfirstbroadcastapplicationis2‐3leafstagefollowedbyaseconddirectedapplicationat5‐6leafstage(seePOSTDIRECTEDsection).Donotexceed4.0qt/AofWARRANTperseason.TankmixwithGLYPHOSATE(useonlyonROUNDUPREADYFLEXvarieties)orLIBERTY(useonlyonLIBERTYLINKvarieties)forcontrolofexistingweeds.DonotapplyWARRANTusingasprayablefluidfertilizerasthecarrierbecauseofseverecropinjurymayoccur.DonotapplyWARRANTtothefollowingsoilswithin50ftofanywellwheredepthtogroundwateris30feetorless:sandswithlessthan3%organicmatter;loamysandswithlessthan2%organicmatter;orsandyloamswithlessthan1%organicmatter.


91

WeedResponsetoPostemergenceDirectedCottonHerbicides1

Aim

Liberty

2

MSM

A

MSM

A+Caparol

MSM

A+Cobra

MSM

A+Cotoran

MSM

A+Direx

MSM

A+LaybyPro

MSM

A+Suprend

MSM

A+Valor

FlexstarGT3

anoda,spurred G P P F F FG F F F G Ebarnyardgrass P FG F FG F F F FG FG FG Ebeggarweed,Florida G P P F F FG F F F G Ebermudagrass P P P P P P P P P P Fcitronmelon P G F G G G G G G G Ecocklebur,common G E E E E E E E E E Ecowpea G G FG G FG G G G G G Ecrabgrass P FG F FG F F F FG FG FG Ecrotolaria,showy G E G G G G G G G G Ecroton,tropic G G F G E G G G GE E Ecrowfootgrass P FG F FG F F F FG FG FG Edayflower,Benghal P PF GE GE GE GE GE GE GE GE PFeclipta G G G G G G E E G E Egoosegrass P F F FG F F F FG FG F Ejimsonweed G E F G GE GE G G G G Ejohnsongrass,seedling P G F FG F F F FG FG F Ejohnsongrass,rhizome P F P P P P P P P P GElambsquarters,common FG E P G F G G G G G Emorninggloryspp. GE E F E E G GE GE E E Gnutsedge,purple P P F F F F F F E FG FGnutsedge,yellow P P FG FG FG FG G G E G Gpanicum,fall P FG F FG F F F FG FG FG Epanicum,Texas P P P F P P P F F PF Epigweedspp.glyphosate‐resistantALS‐resistant

GGG

GGG

PPP

FGFGFG

GGG

FGFGFG

GEGEGE

GEGEGE

GEGEGE

GGG

EGE

poinsettia,wild G PF PF PF G F PF G P G Gpurslane,common P F PF FG G FG G G G G FGpusley,Florida G F P F F F F F F FG Gragweed,common FG E F E E GE E E E GE Eredweed(chocolateweed) G GE P G GE FG GE GE G GE Gryegrass,annual G FG P P FG P GE GE P F Esandbur P FG F FG F F F FG FG F Esenna,coffee ‐‐‐ GE F G F G G G ‐‐‐ G Esesbania,hemp P ‐‐‐ P PF F PF PF ‐‐‐ ‐‐‐ G GEsicklepod P E F GE PF G GE GE E GE Esida,prickly FG GE P GE GE FG GE GE GE GE Gsignalgrass,broadleaf P FG F FG F F F FG FG F Esmartweed,Pennsylvania ‐‐‐ GE P F F G F F ‐‐‐ G Gspurge G FG P G G P G G G G Estarbur,bristly ‐‐‐ G PF G G G G G GE G GEvelvetleaf F G P G G F G G FG G Evol.cornRRhybridsRR+LLhybrids

PPP

GGP

PPP

FGFGFG

FGFGFG

FGFGFG

GGG

GGG

FGFGFG

GGG

EFF

vol.peanut P E F F F F G G FG G F1KeytoResponseRatings:E=excellentcontrol,90%orbetter;G=goodcontrol,80to90%;F=faircontrol,70to80%;P=poorcontrol,lessthan70%;‐‐‐=InsufficientData.2UseonlyonLibertyLink(LL)cottonvarieties3Useonlyonglyphosate‐tolerant(Gly‐TolorRoundupReady[RR]Flex)cottonvarieties.


92

WeedResponsetoPostemergenceDirectedCottonHerbicides(cont)1

Glyphosate2

Glyphosate+Aim/ET2

Glyphosate+Caparol

2

Glyphosate+Direx

2

Glyphosate+Envoke2

Glyphosate+Prowl2

Glyphosate+Staple

2

Glypohsate+Valor

2

Prefix

Reflex

Sequence

2

HOOD

Gramoxone+Direx

anoda,spurred E E E E E E E E P P E Gbarnyardgrass E E E E E E E E P P E Gbeggarweed,Florida E E E E E E E E G G E Ebermudagrass F F F F F F F F P P F Pcitronmelon GE GE GE GE E GE E E G G E Gcocklebur,common E E E E E E E E G G E Gcowpea GE GE GE GE GE GE GE E F F GE Gcrabgrass E E GE GE E E E E P P E Gcrotolaria,showy G G G G G G G G ‐‐‐ ‐‐‐ G Gcroton,tropic E E E E E E E E ‐‐‐ ‐‐‐ E Fcrowfootgrass E E GE GE E E E E P P E Gdayflower,Benghal PF GE FG FG PF PF FG GE ‐‐‐ ‐‐‐ PF Geclipta E E E E E E E E G G E Fgoosegrass E E GE GE E E E E P P E Gjimsonweed E E E E E E E E G G E Gjohnsongrass,seedling E E GE GE E E E E P P E Gjohnsongrass,rhizome GE GE G G E GE GE GE P P GE Plambsquarters,common G GE GE GE GE G GE GE FG FG G Fmorningglory,annual FG E GE GE GE FG GE E G G FG FGnutsedge,purple FG FG FG FG GE FG FG GE FG P FG PFnutsedge,yellow G F F F E G FG E F P F PFpanicum,fall E E GE GE E E E E P P E Gpanicum,Texas E E GE GE E E E E P P E Gpigweedspp.glyphosate‐resistantALS‐resistant

EPE

EFE

EFE

EGE

EGE

EPE

EGE

EGE

EEE

EEE

EPE

GEGEGE

poinsettia,wild G GE GE G E G G GE G G GE Gpurslane,common F G FG GE FG F FG GE P P F Gpusley,Florida PF G G G PF PF PF GE GE GE PF PFragweed,common E E E E E E E E GE GE GE Fredweed(chocolateweed) GE GE GE GE GE GE GE GE G G GE FGryegrass,annual E E E E E E E E F F E Fsandbur,field E E GE GE E E E E P P E Gsenna,coffee E E E E E E E E FG FG GE Fsesbania,hemp F GE GE FG FG F GE FG GE GE G Fsicklepod E E E E E E E E FG FG E GEsida,prickly FG FG G G FG FG G GE FG FG FG PFsignalgrass,broadleaf E E GE GE E E E E P P E GEsmartweed,Pennsylvania G GE G G E G E G ‐‐‐ ‐‐‐ G Gspurge G GE G GE G G G G G G G Gstarbur,bristly GE GE GE GE GE GE GE GE ‐‐‐ ‐‐‐ GE Evelvetleaf E E E E E E E E PF PF E ‐‐‐vol.cornRRhybridsRR+LLhybrids

EFGFG

EFGFG

EFGFG

EFGFG

EGEGE

EFGFG

EFGFG

EGEGE

FGFGFG

FFF

EFGFG

FFF

vol.peanut G GE G G FG FG F FG P P G P1KeytoResponseRatings:E=excellentcontrol,90%orbetter;G=goodcontrol,80to90%;F=faircontrol,70to80%;P=poorcontrol,lessthan70%;‐‐‐=InsufficientData.2Useonlyonglyphosate‐tolerant(Gly‐TolorRoundupReadyFlex)cottonvarieties


93

PostemergenceDirectedHerbicidesforWeedManagementinCotton





1.0‐1.6floz 0.013‐0.025lb

14

7days 12hours

Comments:ApplyAIMat1.0‐1.6oz/Awhencotton isaminimumof6” tall (if less than5‐6nodes,useahoodedsprayer)andwhereasufficientheightdifferentialexistsbetweencropandweed(3‐4”).Caremustbetakentoensurethatnospraycontactsgreenfoliageorunbarkedstem;otherwise,severecropinjurymayoccur.Forbestperformance,applytoactivelygrowingweedslessthan4”tall.Coverageisessentialforgoodcontrol.AddCOC1galorNISat2pt/100gallonsofspraysolution.Foradditionalcontrolofbroadleafandgrassweeds,AIMmaybetankmixedwithotherherbicideslabeledforcottonpost‐directedandlaybyapplications.

Caparol4L(prometryn)

1.3‐2.4pt 0.65‐1.2lb

5

‐‐‐ 12hours

Comments:ApplyCAPAROLat1.3pt/Awhencottonis6inchestallandupto2.4pt/Awhencottonisatleast12”tallbefore weeds are 2 inches in height. Add NIS at 2 qt/100 gal of spray solution. Tankmix partnersmay includeGLYPHOSATE,MSMA,orGRAMOXONE(hoodedapplicatationsonly).

Cobra2EC(lactofen)

6.0‐12.5floz 0.094‐0.195lb

14

70days 12hours

Comments:ApplyCOBRAwhencottonis6”tallandwheresufficientheightdifferentialexistsbetweencropandweed(3‐4”).Directspraytothelower2inchesofthecottonstemtoavoidinjury.Applywhenweedsaresmallandactivelygrowing.Adjustnozzlestoensurefullcoverageoftargetweeds.Donotapplymorethan25floz/AofCOBRAperyear.Donotapplymorethan2applicationsofCOBRAperseason.DonotapplyasequentialapplicationofCOBRAwithin14daysoffirstapplication.TankmixpartnersmayincludeMSMAorDIURON.Rainfastinterval=30minutes.

Cotoran4L(fluometuron)

2.0‐4.0pt 1.0‐2.0lb

7

60days 24hours

Comments:ApplyCOTORANat2.0‐4.0pt/A(dependingonsoiltexture)whencottonisatleast3”tall.Addsurfactantat2qt/100galofspraysolution.TankmixpartnersmayincludePYRIMAX,PARALLELPCS,andMSMA.

Diuron4F(diuron)

1.0‐1.5pt

0.4‐1.2lb

7

‐‐‐ 12hours

Comments:ApplyDIREXat1.0‐1.5pt/Awhencottonisatleast6inchestall(1.0pt/Aon6‐8”tallcottonand1.5pt/Aon cotton that is 8‐12” tall). For enhanced control of emerged weeds, tank mix with MSMA, GLYPHOSATE, orGRAMOXONE(hoodedonly).

DualMag.7.62EC(s‐metolachlor)

1.0‐1.33qt

0.95‐1.27lb

15

80days 24hours

Comments:ApplyDUALat1.0‐1.33pt/Awhencottonisatleast3inchestall.Forenhancedcontrolofemergedweeds,tankmixwithMSMA,GLYPHOSATE,CAPAROLorCOTORAN.


94

PostemergenceDirectedHerbicidesforWeedManagementinCotton(cont)




ET0.208EC(pyraflufenethyl)ETX0.338EC

0.5‐1.0floz

0.3‐0.6floz

0.0008‐0.0016lb

14

7days 12hours

Comments:ApplyETat0.5‐1.0floz/AorETXat0.3‐0.6floz/Awhencottonisatleast18"tallandhasaminimumof3”ofstembark.Applywhenweedsarelessthan4”tall.Avoidcontactwithdesirablefoliage.Allowaminimumof30daysbetweenapplications.Rainfastinterval=N/A

Envoke(trifloxysulfuron)

0.1‐0.2oz 0.0047‐0.0094lb

2

60days 12hours

Comments:ApplyENVOKEat0.1‐0.2oz/Awhencottonatleast6"tallthroughlayby.Forcontrolofemergedweeds(usehigherratefor largerweeds;max4”tall).AddNISat2qtorCOCat1gal/100galofspraysolution.Rainfastinterval=3hours.ResistanceManagement:Makeonlyoneapplicationofagroup2containingherbicidepergrowingseason.

Fierce76WDG(flumioxazin+pyroxasulfone)

3.0oz 0.063lb

+0.080lb

1415

60days 12hours

Comments:ApplyFIERCEat3.0oz/Awhencottonisatleast6”tallwithadirectedshieldedsprayer.Forlaybytimings,FIERCEappliedwhencottonisatleast18”tallandshouldbedirectedatthelower2inchesofthecottonstemtoavoidinjury.FIERCEshouldbetankmixedwithMSMA,DIURON,orGLYPHOSATEtocontrolemergedweeds.AddNISat1qtper100galofspraysolution.Donotapplymorethan3oz/AofFIERCEduringasingleapplication.Donotapplymore6oz/Aduringasinglegrowingseason.DonotmakeasequentialapplicationofFIERCEwithin30daysofthefirstapplicationofFIERCE.Rainfastinterval=1hour.

FlexstarGT3.5SL(fomesafen +glyphosate)

3.5pt 0.25lb+

0.99lbae

149

70days 24hours

Comments: USE ONLY ON COTTON VARIETIES DESIGNATED AS ROUNDUP READY FLEX! For directedapplications,applyFLEXSTARGTtocottonatleast6”tall.ApplyFLEXSTARGTtocottonatleast18”tallwith4”ofbarkatthebaseoftheplantatlayby.Caremustbetakensothatnospraycontactsgreenfoliageorunbarkedstem;otherwise,severecropinjurymayoccur.ApplyFLEXSTARGTwhenweedsaresmall(2‐4cotyledonstageforbroadleafweeds)andifactivatedbyrainfallwillprovideresidualweedcontrol.Donotapplymorethan3.5pt/AofFLEXSTARGT per postemergence directed application per year. Tank mix partners may include any herbicide labeled forpostemergencedirectedapplicationsincotton.Rainfastinterval=1hour.ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.


95





Glyphosate acidequivalent(ae)4.5lbae/gal

22‐32floz

0.75‐1.12lbae

9

7days 4hours

Comments:USEONLYONCOTTONVARIETIESDESIGNATEDASROUNDUPREADYFLEX!Apply0.63to1.12lbae/Afromcrackinguntil7daysbeforeharvest.Controlsannualgrassesandbroadleaves.Directsprayallowsbettercontactwithweedsunderthecottoncanopy.Bestresultsareobtainedwhenweedsarelessthan3”tall.Consultlabelformaximumapplicationratesallowedduringtheseason.TankmixeswithGLYPHOSATElabeledforpost‐directedapplications to ROUNDUPREADY FLEX cotton varieties include AIM, CAPAROL, DIREX, DUALMAGNUM, DUAL IIMAGNUM,ENVOKE,PARRLAY,STAPLE,VALOR,WARRANT,andPENDIMETHALIN.Seetankmixpartner labels formoreinformation.Rainfastinterval=heavyrainfallsoonafterapplicationmaywashproductoffofthefoliageandarepeatapplicationmaybeneededtoensureadequateweedcontrol(suggest1hour).ResistanceManagement:Glyphosate‐resistant (Group 9)Palmer amaranth is spreading rapidly throughout SouthCarolina.Continuedrelianceonglyphosate‐onlyprogramswillenhanceselectionandspreadofresistantbiotypes.Tankmixingglyphosatewithotherchemistriesmustbeutilized.

Goal2XL(oxyflourfen)GoalTender

1.0‐2.0pt

0.5‐1.0pt

0.25‐0.5lb

14 90days 24hours

Comments:ApplyGOAL/GOALTENDERwhencottonis6to8inchestall.Applywhenweedsaresmallandactivelygrowingpreferablywhentherearenotmorethan4trueleavespresent.Adjustnozzlestoensurefullcoverageoftargetweeds.Donotusehollowconenozzles.Useaminimumof20GPAsprayvolume.Donotapplymorethan0.5lbai/Aofoxyflourfenperseason.GOAL/GOALTENDERmaybetankmixedwithotherherbicidesregisteredforpostemergenceuseincotton.

ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.

LaybyPro4L(liuron+diuron)

1.0‐2.0pt

0.25‐0.5lb

+0.25‐0.5lb

77

76days 24hours

Comments:ApplyLAYBYPROat1.0‐1.5pt/Awhencottonatleast8"talland1.6‐2.0pt/Awhencottongreaterthan15"tall.Forcontrolofemergedweeds(usehigherrate for largerweeds;max4”tall).AddNISat2qtorCOCat1gal/100galofspraysolution.Rainfastinterval=2hours.

Liberty2802.34SL(glufosinate)

29‐43floz

0.53‐0.79lb

10

70days 12hours

Comments:USEONLYONCOTTONVARIETIESDESIGNATEDASLIBERTY‐LINK!ApplyLIBERTYat29oz/Aasadirected applicationwhen cotton canopy prevents spray from reachingweeds below.Do not exceed 87oz/Aperseason(uptothree29oz/Aapplications).Ifweatherconditionspreventatimely1stapplication,thenLIBERTYmaybeappliedupto43oz/Atocontrollargerweeds.Ifmorethan29oz/Aareusedinanysingleapplication,seasonaltotalmaynotexceed72oz/Aincludingallapplicationtimings.Controlsannualgrassesandbroadleaves.Directsprayallowsbettercontactwithweedsunderthecottoncanopy.Bestresultsareobtainedwhenweedsarelessthan3”tall.Directspraytothelowerthirdofthecottonplant.AddAMSat3lb/Atothespraysolution.Forresidualcontrolofweeds,tankmixDUALMAGNUM,WARRANT,orSTAPLE.Rainfastinterval=4hours.


96





MSMA6L 2.67pt 2.0lb 17 ‐‐‐ 12hours

Comments:ApplyMSMAwhencottonis3"talluptofirstbloom.Donotapplyafterfirstbloom.Aslightburningorreddishdiscolorationofthefoliagemayoccurafterapplication;however,cottonplantswilldevelopnormally.Addsurfactantat2qt/100galtothespraysolution.Donotapplymorethan4lbai/AofMSMA.Rainfastinterval=2hours.

Prefix5.29EC(s‐metolachlor+fomesafen)

2.0‐2.33pt 1.09‐1.26lb

+0.24‐0.28lb

1514

80days

24hours

Comments:Fordirectedapplications,applyPREFIXtocottonatleast6”tall.ApplyPREFIXtocottonatleast18”tallwith4”ofbarkatthebaseoftheplantatlayby.Caremustbetakensothatnospraycontactsgreenfoliageorunbarkedstem;otherwise,severecropinjurymayoccur.PREFIXwillcontrolsmallemergedweeds(2‐4cotyledonsforbroadleafweeds)andifactivatedbyrainfallwithin7‐10dayswillprovideresidualweedcontrol.AddNISat1‐2qtorCOCat1gal/100gallonsofspraysolution.Donotapplymorethan2.33pt/AofPREFIXperseason.DonotaddliquidnitrogentoPREFIXtankmixesincotton.TankmixpartnersmayincludeCAPAROL,DSMA,DIREX,ENVOKE,KARMEX,LAYBYPRO,MSMA,GLYPHOSATE(glyphosate‐tolerantcottonvarietiesonly),andSUPREND.Rainfastinterval=N/A.ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.

ProwlH203.8CS(pendimethalin)Prowl3.3EC

1.0‐2.0pt

1.2‐2.4pt

0.48‐0.95lb

3

60days 24hours

Comments:ApplyPROWLdirectlytothesoilbetweenrowsasadirectedsprayfollowingthelastcultivation.LaybyapplicationscanbeappliedincottonpreviouslytreatedwithPROWL.However,thetotalamountofPROWLappliedperacreperseasoncannotexceedthehighestlabelrateofPROWLforthegivensoiltype.ControlsPalmeramaranth(glyphosate‐andALS‐resistantbiotypes),commonlambsquarters,Floridapusley,andcrabgrass.Note:Ifyourfieldhasa history of poor Palmer amaranth control with yellow herbicides, consider alternative soil residual partner forGLYPHOSATE(i.e.,DUALorWARRANT).Rainfastinterval=N/A.

Sequence5.25SL(glyphosate+s‐metolachlor)

2.5pt

0.75lbae+

0.94lb

915

50days 24hours

Comments:USEONLYONCOTTONVARIETIESDESIGNATEDASROUNDUPREADYFLEX!ApplySEQUENCEat2.5pt/Aupto12"tallcotton(10leafstage).Donotapplylaterincottondevelopmentassevereinjury,includingyieldloss,mayoccur.Controlsannualgrassesandbroadleaves.Bestresultsareobtainedwhenweedsarelessthan3”tall.Donotexceed3.5pt/AofSequenceperseason.CanbetankmixedwithCENTRICorKARATEinsecticides.Rainfastinterval=heavyrainfallshortlyafterapplicationrequireretreatment.


97





Suprend80WDG(prometryn+trifloxysulfuron)

1.0‐1.5lb 0.79‐1.18lb

+0.007‐0.0105lb

72

60days 12hours

Comments:ApplySUPRENDat1.0‐1.5lb/Awhencottonisatleast6"tall.Forcontrolofemergedweeds(usehigherrateforlargerweeds;lessthan6”tall).Addsurfactantat2qt/100galtothespraysolution.DonottankmixSUPRENDwithMALATHION,PROFENFOS,DENIM,ACEPHATE,BIDRIN,CAPTURE,KARATEorunacceptablecropinjurymayoccur.Donotexceed0.0188lbai/Aoftrifloxysulfuronperyear.Rainfastinterval=3hours.ResistanceManagement:Makeonlyoneapplicationofagroup2containingherbicidepergrowingseason.

ValorSX51WDG(flumioxazin)

1.0‐2.0oz 0.032‐0.064lb

14

21days 12hours

Comments:ApplyVALORSXat2oz/Awhencottonisatleast18"tallasadirectspraytocontactonlylower2”ofbarkonstem(nospraycontactsgreenfoliageorunbarkedstem).DonotapplyMSMAafterfirstbloom.AddNISat1qt/100galofspraysolution.DonotuseCOC,MSO,organo‐siliconeadjuvants,oranyadjuvantcontaininganyofthese.Rainfastinterval=2hours.ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.


1.5‐2.0qt 1.125lb

15

‐‐‐ 12hours

Comments:ApplyWARRANTpostemergencedirectedfrom5‐6leafstageuntilcottonreachesfirstbloom.Providesresidualcontrolofsmallseededbroadleavesandgrasses.Donotexceed4.0qt/AofWARRANTperseason.TankmixwithGLYPHOSATE(useonlyonROUNDUPREADYFLEXvarieties)orLIBERTY(useonlyonLIBERTYLINKvarieties)forcontrolofexistingweeds.DonotapplyWARRANTusingasprayablefluidfertilizerasthecarrierbecauseofseverecropinjurymayoccur.DonotapplyWARRANTtothefollowingsoilswithin50ftofanywellwheredepthtogroundwateris30feetorless:sandswithlessthan3%organicmatter;loamysandswithlessthan2%organicmatter;orsandyloamswithlessthan1%organicmatter.


98

HoodedSprayerHerbicidesforWeedManagementinCotton




ET0.208EC(pyraflufenethyl)ETX0.335EC

0.5‐1.0floz

0.3‐1.25floz

0.0008‐0.0033lb

14

7days 12hours

Comments:ApplyETat0.5‐1.0floz/AorETXat0.3‐1.25floz/Awhencottonis18inchesormoreandhasaleast3inchesofstembarkusinghoodedgroundequipmentonly.Applywhenweedsarelessthan4”tall.Avoidcontactwithdesirablefoliage.Allowaminimumof30daysbetweenapplications.Donotexceed0.0033lbaiPYRAFLUFENETHYLperseason.

Fierce76WDG(flumioxazin+pyroxasulfone)

3.0oz 0.063lb

+0.080lb

1415

60days 12hours

Comments:ApplyFIERCEat3.0oz/Awhencottonisatleast6”tallwithahoodedsprayer.FIERCEshouldbetankmixedwithMSMA,DIURON,orGLYPHOSATEtocontrolemergedweeds.AddNISat1qtper100galofspraysolution.Donotapplymorethan3oz/AofFIERCEduringasingleapplication.Donotapplymore6oz/Aduringasinglegrowingseason.DonotmakeasequentialapplicationofFIERCEwithin30daysofthefirstapplicationofFIERCE.Rainfastinterval=1hour

FlexstarGT3.5SL(fomesafen+glyphosate)

3.5pt 0.25lb+

0.99lbae

149

70days 24hours

Comments:Forhoodedorshieldedsprayerapplications,applyFLEXSTARGTtocottonatleast6”tall.Caremustbetakensothatnospraycontactsgreenfoliageorunbarkedstem;otherwise,severecropinjurymayoccur.ApplyFLEXSTARGTwhenweedsaresmall(2‐4cotyledonstageforbroadleafweeds)andifactivatedbyrainfallwillprovideresidualweedcontrol.Adjustnozzlestoensurefullcoverageoftargetweeds.Donotapplymorethan3.5pt/AofFLEXSTARGTperpostemergencedirectedapplicationperyear.Tankmixpartnersmayincludeanyherbicidelabeledforpostemergencedirectedapplicationsincotton.Rainfastinterval=1hour.ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.


22floz

0.75lbae

9 7days 12hours

Comments:Hoodsshouldbekeptasclosetothegroundaspossibleinconventionalandnon‐RoundupReadycottonvarieties.Donotallowthespraytocontactstemsorfoliageofnon‐RoundupReadycotton.Applyin5‐10GPAatamaximumof25PSI.Donotexceed5MPH.Cottonshouldbeatleast8”tall.SeeGLYPHOSATEproductlabelforadjuvantrecommendation.TankmixeswithCAPAROL,DIREX,ENVOKE,LAYBYPRO,STAPLE,PROWL,andVALORwillenhanceresidualweed control.Rainfast interval=heavyrainfallsoonafterapplicationmaywashproductoffof thefoliageandarepeatapplicationmaybeneededtoensureadequateweedcontrol(suggest1hour).ResistanceManagement: Glyphosate‐resistant Palmer amaranth is spreading rapidly throughout South Carolina.Continuedrelianceonglyphosate‐onlyprogramswillenhanceselectionandspreadofresistantbiotypes.Tankmixingglyphosatewithotherchemistriesmustbeused.


99

HoodedSprayerHerbicidesforWeedManagementinCotton(cont)




GramoxoneSL2S(paraquat)

1.2‐2.0pt 0.3‐0.5lb

22

15days 24hours

Comments:Hoodsshouldbekeptasclosetothegroundaspossible.Donotallowthespraytocontactstemsorfoliageofcotton.Applyinaminimumof10GPAatamaximumof25PSI.Donotexceed5MPH.Cottonshouldbeatleast8”tall.AddNISat2ptorCOCat1gal/100galofspraysolution.Allow14daysbetweenmultipleapplications.CAPAROL or DIREX may be tank mixed with GRAMOXONE and will enhance residual weed control.Rainfastinterval=30minutes.

Liberty2802.34SL(glufosinate)

29‐43floz

0.53‐0.79lb

10

70days 12hours

Comments:Hoodsshouldbekeptasclosetothegroundaspossibleinconventionalandnon‐Liberty‐Linkcottonvarieties.Donotallowthespraytocontactstemsorfoliageofcotton.Applyinaminimumof15GPAatamaximumof25PSI.Donotexceed5MPH.ApplyLIBERTYat29‐43oz/Aasahoodedapplicationwhencottoncanopypreventsspray fromreachingweedsbelow.Cottonshouldbeat least8” tall.Donotexceed87oz/Aperseason fromallapplicationsources.AddAMSat3lb/Atothespraysolution.Fornon‐Liberty‐Linkvarieties,Tankmixpartnersforhooded applications of LIBERTY include AIM, CAPAROL, COTORAN, DIREX, DUAL MAGNUM, GLYPHOSATE,KARMEX,PENDIMAX,PROWL,SELECTMAX,andSTAPLE.Rainfastinterval=4hours.

Prefix5.29EC(s‐metolachlor+fomesafen)

2.0‐2.33pt 1.09‐1.26lb

+0.24‐0.28lb

1514

80days

24hours

Comments:Forhoodedorshieldedsprayerapplications,applyPREFIXtocottonatleast6”tall.Caremustbetakensothatnospraycontactsgreenfoliageorunbarkedstem;otherwise,severecropinjurymayoccur.PREFIXwillcontrolsmallemergedweeds(2‐4cotyledonsforbroadleafweeds)andifactivatedbyrainfallwithin7‐10dayswillprovideresidualweedcontrol.AddNISat1‐2qtorCOCat1gal/100gallonsofspraysolution.Donotapplymorethan2.33pt/AofPREFIXperseason.TankmixpartnersincludeCAPAROL,DSMA,DIREX,ENVOKE,KARMEX,LAYBYPRO, MSMA, GLYPHOSATE (glyphosate‐tolerant cotton varieties only), and SUPREND.Rainfastperiod =N/A(suggest1hour)ResistanceManagement:Makeonlyoneapplicationofagroup14containingherbicidepergrowingseason.


100

HarvestAidsforCotton





1.6floz 0.025lb

14

7days 12hours

Comments:ApplyAIMupto1.6oz/Aafter60to70%ofthebollsareopen.Useaminimumof10gallonsperacreforgroundapplicationsand5gallonsperacreforaerialapplications.Coverageisessentialforgooddefoliation.Arepeatapplicationofupto1.6oz/Aisallowediffoliageisremainingorregrowthisoccurring.Densecanopy,largeplantsizes,andenvironmentalconditionsnon‐conducivetocompleteplantcoveragemayreduceinitialapplicationperformanceandincreaseneedforasecondapplication.AIMmaybetankmixedwithPREP,FINISH,DEF,DROPP,FOLEX,HARVADE,GINSTAR,COTTONQUIK,orotherregisteredcottonharvestaidproducts.Donotapplymorethan3.2oz/Aperseasonasaharvestaid.AddaNISa0.25%v/v(warmerperiodsofdefoliation)orCOCat1galper100gal(coolerperiodsofdefoliation).Rainfastinterval=6‐8hours.

ET0.208EC(pyraflufenethyl)

1.5‐2.75floz 0.0024‐0.0045lb

14

7days 12hours

Comments:ApplyETupto2.75oz/Awhenbollsare60%open.Useaminimumof20gallonsperacreforgroundapplications or 5 gallons per acre for aerial applications. Coverage is essential for good defoliation. Adequatedefoliationisgenerallyachievedwithin7to14daysafterapplication.Arepeatapplicationofupto2.75oz/Aisallowed if foliage is remaining or regrowth is occurring. Do not exceed 2 applications or 5.5 oz/A of ET fordefoliation of cotton. Applications must be made a minimum of 7 days apart. ET may be tank mixed withCOTTONQUIK, CYCLONE, DEF, DROPP, FINISH, FOLEX, GINSTAR, PREP, GRAMOXONE, and/or GLYPHOSATE.Rainfastinterval=1hour.


22‐44floz

0.75‐1.5lbae

9 7days 12hours

Comments:ApplyGLYPHOSATEafter60%ofthebollsareopen(non‐RoundupReadycotton).Canbetankmixedwithsomedefoliants;seelabelsfordetails.ApplytoRoundupReadycottonvarietiesafter20%crackedbollstageortoRoundupReadyFLEXcottonupto7daysbeforeharvest.DonotapplyGLYHOSTEtocottongrownforseedasareductioninvigororgerminationmayoccur.Rainfastinterval=heavyrainfallsoonafterapplicationmaywashproductoffofthefoliageandarepeatapplicationmaybeneededtoensureadequateweedcontrol(suggest1hour).


8.0floz

5.4floz

0.13lb

22

7days 12hours

Comments:Defoliatecottonasnormal.Afteratleast75‐80%ofbollsareopen,theremainingbollsexpectedtobeharvestedaremature,andmostofthecottonleaveshavedropped,applyGRAMOXONEinaminimumof20GPAandadd1ptNISper100galofspraysolution.Rainfastinterval=30minutes.

Documents

2016 PMH MASTER - clemson.edu · South Carolina Pest Management Handbook for Field Crops - 2016 76 Preplant Burndown Herbicides for Weed Management in Cotton (cont) Herbicide Rate/Acre