Transcription
ERM-146605/16
Chemical Weed and Brush ControlSuggestions for RangelandRobert K. Lyons, Megan Clayton, Wayne Hamilton, Larry Redmon, Barron Rector, and Jeff Goodwin*This publication provides general suggestions for herbicides used to control brush and weeds on Texas rangelands. It also givesinformation on the levels of control expected. The information is presented in good faith, but no warranty, express or implied, isgiven. Weed and brush control results may vary tremendously if treatments are applied under less than optimum conditions.Users of this publication may find the decision support system for rangeland weed and brush control technology selection—PestMan—helpful. PestMan is designed to recommend appropriate mechanical and chemical rangeland brush and weed controltreatments for Texas and New Mexico. All herbicide treatments included in this publication are also included in PestMan, whichhelps in estimating costs and the economic impact of various treatment options. PestMan is an Internet-based system (http://pestman.tamu.edu) that can be accessed free of charge.How to use this guide1. Find your problem weed or brush species in the Index onPage 4.2. Go to the pages where your plant is listed; find the plantname in the first column on those pages.3. See the second column on those pages for a list of suggestedherbicides (these are active ingredients).4. Choose herbicides based on:a. Whether you would like to make a broadcastapplication or treat individual plants (third or fourthcolumn).b. Check the effectiveness (VH, H, M, and L), which tellsyou the percentage of plants you should expect to killwith that herbicide and rate. For percent kill ranges, seePage 5.c. See the fifth column for the method to use—how toapply the chemical. This could be foliar, stem, cutstump, aerial, etc.5. The three columns on the right explain other details, suchas how much surfactant to use, when to treat the plant, andany exceptions. Be sure to read these before choosing anherbicide.6. Go to Page 6 and match the herbicide you chose forcontrolling the problem plant with product names you aremore likely to know.7. For tips on measuring and mixing herbicides, see Page 7.*Professor and Extension Range Specialist, Assistant Professor and Extension Range Specialist, Senior Lecturer, Professor andExtension Forage Specialist, Associate Professor and Extension Range Specialist, The Texas A&M University System; and StateRangeland Management Specialist, USDA–Natural Resources Conservation Service
IndexControl descriptions for weed and brush plants are located on the page numbers indicated. Carefully check the table. More than one control measure may exist.Weed speciesPageAfrican rue.8Bitter sneezeweed . 8, 9Broomweed (annual or common). 9, 10Broom snakeweed.11Buffalobur. 8, 9Bullnettle.11Camphorweed. 8, 9Carolina horsenettle.11Cocklebur. 8, 9Common goldenweed. 11, 12Croton. 8, 9Dogfennel.11Drummond’s goldenweed. 11, 12Flathead sedge.12Gray goldaster.13Horehound. 8, 9Jimmyweed.14Lespedeza.13Marshelder. 8, 9Narrowleaf goldaster.13Perennial broomweed.10Plantain. 9, 10Prairie gerardia. 8, 9Ragweed. 8, 9Rayless goldenrod.14Rosin weed.11Silverleaf nightshade.11Smartweed. 8, 9Spiny aster.14Sunflower. 8, 9Tallowweed. 9, 10Thistles. 8, 9Threadleaf groundsel.12, 14Treadsalve.11Twinleaf (twoleaf) senna.15Upright prairie-coneflower. 11, 15Western bitterweed. 8, 9Western horsenettle.11Western ragweed. 8, 9Wild carrot. 9, 10Wolfweed.14Woolly locoweed.12Yankeeweed.11Brush speciesPageAshe juniper.16Baccharis.16, 17Beebrush.18, 33Beebush.18, 33Bigelow shinoak.17Blackberry.17Blackbrush.17, 18, 29Blackgum.18Blackjack oak.18Blueberry cedar.16Bois d’arc. 17, 18Burrobrush.18Catclaw acacia. 17, 29Catclaw mimosa.17, 19, 29Cenizo.19Chinese tallowtree.17, 19, 20Cholla.16Christ thorn .20, 24, 27Common persimmon. 20Creosotebush. 20Dog cactus.16Dryland willow.16, 17Eastern persimmon. 20Eastern redcedar. 20Elm.17, 18, 21Flameleaf sumac.21Giant reed.21Granjeno.21, 29Greenbriar. 17, 21Guajillo.18, 29Hackberry.17, 18, 21Hardwoods. 18, 21, 25Hercules club.17, 18, 21Honeylocust. 22Huisache. 21, 22, 23, 24, 25, 29Lotebush. 18, 21, 23Macartney rose.23, 24Mesquite. 24, 25, 26, 27, 28Mesquite, western honey. 28Mixed brush–South Texas. 28, 29Mixed brush–Davis Mountains. 29Mohrs shinoak. 29Post oak.18Pricklyash (Hercules club).17, 18, 21Pricklypear. 30Redberry cedar.16, 30, 31Redberry juniper.16, 30, 31Retama. 23, 29Roosevelt willow.16, 17Running live oak.31Sacahuista. 32Saltcedar. 32Sand sagebrush. 32Sand shinnery oak. 32Saw palmetto. 33Seep willow.16, 17Skunkbush. 29Spiny hackberry.21, 29Sweetgum.18Tarbush. 20Tasajillo.16, 30Texas persimmon.17Twisted acacia. 25, 29White shinoak.17Whitebrush.18, 29, 33Whitethorn acacia. 20Willow.18Willow baccharis.16, 17Winged elm.17Yaupon. 17, 21Yucca. 33
Millions of acres of Texas rangeland support an excessive cover of woody plantsand forbs. Dense stands of brush and weeds use valuable water for growth,reduce grass production, and cause soil erosion. These noxious plants must bemanaged effectively for rangelands to reach their productive potential. The use of herbicides provides an effective and efficient alternative for controlling brush and weeds for improving and maintaining of rangelands in a highly productive condition.This publication lists current suggestions for herbicide use to control brush and weeds onrangeland. Some herbicides provide a high degree of control of certain species; however,seldom is a species eradicated. Consider other potential rangeland uses when developing abrush management program. Many trees, shrubs, and forbs are valuable as food and coverfor wildlife and may be an important component in livestock diets. Therefore, a brushmanagement program should provide for control methods that give optimum benefits tolivestock and wildlife.Herbicide application may increase the palatability of poisonous plants. Thus, they aremore likely to be consumed by livestock. To prevent losses to toxic plants, do not grazeherbicide-treated areas with poisonous plants present until the toxic plants dry up and losetheir palatability.Properly used herbicides are effective and safe. Misuse can result in poor brush and weedcontrol, herbicidal drift, dangerous residues, or death of desirable plants. Listed below arepoints to follow for proper herbicide use: Identify the weed or brush species and evaluate the need for control. Consider the expected benefits, costs, and alternative control practices. Buy the suggested herbicide for the weed or brush species. Read and follow herbicide label directions for allowable uses, application rates, and special handling or mixing requirements. Provide and require the use of proper safety equipment. Calibrate spray equipment. Mix herbicides in a ventilated area, preferably outside. Spray under conditions that prevent drift to susceptible crops. Apply the herbicides at the suggested rate and time. Keep a record of the herbicide used, the time required to spray, weather conditions, rateof herbicide in the carrier, date, location, and the person using the herbicide.Introduction; Table 1. Rating categories for herbicide treatments and degree of target plant mortality after treatmentThe sprayer used must apply the correct quantity of herbicide mixture to a specific area. Tocalibrate spray equipment, see Extension publication L-5465, Weed Busters: Sprayer Calibration Guide.Suggestions on the use of herbicides made by the Texas A&M AgriLife Extension Serviceare based upon effectiveness under Texas conditions.Broadcast and individual plant treatments are presented in Tables 6 and 7. Individual planttreatments are suited for controlling thin stands of brush and selective control. Broadcasttreatments are useful for dense stands of brush and for weed control.Suggested herbicides must be registered and labeled for use by the Environmental Protection Agency. Because the status of herbicide label clearance is subject to change, be certainthat the herbicide is currently labeled for the intended use.The users are always responsible for the effects of herbicide residue on their livestock andcrops, as well as for problems that could arise from drift or movement of the herbicidefrom their property to that of others. Always read and follow carefully the instructions onthe container label.Treatment control ratingsA control rating, based on the effectiveness of an herbicide treatment in controlling atarget plant, has been assigned to each herbicide use suggestion. These ratings were determined from research and result demonstration data and from observations of commercialapplications. The rating represents a degree of plant mortality of the target plant specieswhen the treatment is applied properly under optimum conditions.Table 1. Rating categories for herbicide treatmentsand degree of target plant mortality after treatmentControl ratingPercent of plants killedVery high76–100High56–75Moderate36–55Low0–355
Table 2. Common, chemical and product names of herbicides*Herbicide common nameChemical nameProduct nameActive ingredientor acid equivalentaminopyralid2-pyridine carboxylic acid, 4-amino-3, 6-dichloro-2-pyrdine carboxylic acid, triisopropanolammonium salt——aminopyralid:2,4-D (1:8)See aminopyralid and 2,4-DGrazonNext HL3.75 lb/galaminopyralid:clopyralid (1:4.6)See aminopyralid and clopyralidSendero2.8 lb/galaminopyralid:metsulfuron methyl(1:6.2)See aminopyralid and metsulfuronChaparral0.62 lb/lbclopyralid3,6-dichloro-2-pyridinecarboxylic acidPyramid R&P, Clopyralid 33 lb/gal2,4-D(2,4-dichlorophenoxy) acetic acidWeedar 64, Broad Range 55, Hi-Dep,Weedone LV4, Esteron 99, othersamine salts, free acids, and estersof variable concentrationdicamba3,6-dichloro-2-methoxybenzoic acidBanvel, Clarity, Vision4 lb/galdicamba:2,4-D(1:3)See dicamba and 2,4-DWeedmaster, Banvel 2,4-D, RangeStar,Outlaw4 lb/galdiesel fuel oil or kerosenerefined petroleum fractionsSeveral manufacturers—fluroxypyr1-methylheptyl ester: etic acidVista XRT2.8 lb/galglyphosateN-(phosphonomethyl) glycineSeveral, including Rodeo**, Roundup,Roundup Ultradry, Glyphosate 417isopropylamine salt; concentrationvaries depending on the methyl-1,3,5-triazine-2,4(IH, 3H)-dioneVelpar L, Pronone Power Pellet2 lb/gal (Velpar L)75% (Pronone Power ethy)-5-oxo-lH-imidazol-2-yl]-3-pyridinecarboxylic acidArsenal, Habitat**2 lb/galmetsulfuron methylmethyl bonyl]amino] sulfonyl] benzoateEscort, Clean Pasture, MSM 60DF60%metsulfuron:chlorosulfuron (3:1)See metsulfuron methyl )aminocarbonyl]benzenesulfonamideCimarron Plus48% metsulfuron15% chlorosulfuronmetsulfuron:chlorosulfuron (1:1)See metsulfuron: chlorosulfuronCimarron X-Tra30% metsulfuron37.5% chlorosulfuronmetsulfuron methyldicamba:2,4-D (1:3)See metsulfuron methyl, dicamba and 2,4-DCimarron Max60% (Part A)3.87 lb/gal (Part ylic acidTordon 22K, Triumph 22K, Picloram 22K2 lb/galpicloram:fluroxypyr (1:1)See picloram and fluroxypyrSurmount1.34 lb/galpicloram:2,4-D (1:4)See picloram and 2,4-DGrazon P D, Gunslinger, Picloram D2.5 lb/galpicloram:2,4-D (1:4)See picloram and 2,4-DGraslan L3.8 adiazol-2-yl}-N-N’-dimethylureaSpike 20P, Spike 80 DF20% (Spike 20P)80% (Spike 80 ic acidClear Pasture, Pathfinder II, Triclopyr R&P,Remedy Ultra, Triclopyr 4 EC0.75 lb/gal (Pathfinder II–ready to useformulation for stem sprays)4 lb/gal (all others)triclopyr:fluroxypr (3:1)See triclopyr and fluroxypyrPastureGard HL4 lb/galtriclopyr:2,4-D(1:2)See triclopyr and 2,4-DCrossbow3 lb/gal*Herbicides have been identified by the accepted Weed Science Society of America common name, and when practical, one or more product names.**Aquatic label6Table 2. Common, Chemical and Product Names of Herbicides
Table 3. Common measurement conversions for use with herbicide applicationsLiquidWeight1 gallon (gal) 4 quarts (qt)1 gal 8 pints (pt)1 gal 16 cups (c)1 gal 128 ounces (oz)1 gal 3784.96 milliliters (ml)1 quart (qt) 2 pt1 qt 4 c1 qt 32 oz1 qt 946.24 ml1 pint (pt) 2 c1 pt 16 oz1 pt 473.12 ml1 c 8 oz1 oz 2 tablespoons (tbs)1 oz 29.57 ml1 tablespoon (tbs) 3 teaspoons (tsp)1 tbs 0.5 oz1 tbs 14.79 ml1 teaspoon (tsp) 4.98 ml1 pound (lb) 16 oz1 lb 453.6 grams (g)1 oz 28.35 g1 kilogram (kg) 2.2 lbArea1 acre 43,560 square feet (sq ft)1 hectare (ha) 2.471 acresTable 4. Guide to quantity of herbicide formulation for total volume of spray mixHerbicide concentration desired for individual plant and spot treatmentTotal sprayvolumedesired0.25 %1 gal0.33 oz0.67 oz1 oz1.33 oz2 oz2.67 oz3 gal*1 oz2 oz3 oz4 oz*6 oz5 gal1.67 oz3.33 oz5 oz6.5 oz10 gal3.33 oz6.5 oz10 oz25 gal8 oz16 oz50 gal16 oz100 gal32 oz0.5 %0.75 %1%*1.5%2%3%4%5%10%15%25%4 oz5.25 oz6.5 oz13 oz19 oz1 qt8 oz12 oz15.5 oz19 oz38 oz57 oz96 oz10 oz13 oz19 oz26 oz32 oz64 oz96 oz1.25 gal13 oz19 oz26 oz38 oz51 oz2 qt1 gal1.5 gal2.5 gal24 oz32 oz48 oz64 oz96 oz1 gal1.25 gal2.5 gal3.75 gal6.25 gal32 oz48 oz64 oz96 oz1 gal1.5 gal2 gal2.5 gal5 gal7.5 gal12.5 gal64 oz96 oz1 gal1.5 gal2 gal3 gal4 gal5 gal10 gal15 gal25 galQuantity of herbicide formulation*Example: To prepare 3 gal of a spray mixture (herbicide, water, and surfactant) containing 1% herbicide, add 4 oz of herbicide.Note:Add 0.25%–0.5% commercial, non-ionic surfactant for mixtures using only water as the herbicide carrier.Add 5% diesel fuel if an oil-in-water emulsion is the herbicide carrier. Add an oil emulsifying agent (emulsifier) according to label directions. Agitation and the emulsifier are necessary to prevent separation ofthe spray mixture.Caution:Non-ionic surfactants are not emulsifying agents and will not result in the formation of an emulsion when diesel fuel and water are mixed and agitated. Add the emulsifier at 1–3 oz/gal of the diesel fuel beforeadding the diesel fuel to the spray tank. Fill the spray tank to about half the desired volume with water before adding the diesel fuel-emulsifier premix. Then slowly add the diesel fuel-emulsifier premix to the spraytank, with agitation, after which fill the spray tank to the desired volume with water.Table 3. Common Measurement Conversions; Table 4. Guide to Quantity of Herbicide Formulation7
Table 5. Herbicides for controlling weeds on rangelandWeed controlledAfrican rueBerlander lobelia, bittersneezeweed, buffalobur,camphorweed, cocklebur,croton, horehound,marshelder (sumpweed,sulfaweed), prairie gerardia(see remarks), ragweed,smartweed, sunflower,thistles, western bitterweed(see remarks), westernragweed, others(continued on next page)Herbicide (common andchemical names, Table 2)Herbicide quantity(active ingredient rate in parenthesis)Spray volume(per acre for broadcast, asdescribed for individualplant)Timeto applyRemarksBroadcast rateper acreIndividual plant/spottreatment*hexazinone liquid—VH**2 ml/plantUse an exact delivery handgun toapply undiluted herbicide to soilsurface at the edge of the plantcanopy.hexazinone pellet—1 pellet/plant—tebuthiuron 20% pelletsH7.5 lb (1.5 lb)—imazapyrH32 oz (0.5 lb)VH0.5%2,4-D amine or low volatileesterVH**16–32 oz (0.5–1 lb)4 lb/gal productVH1% (4 lb/gal product)dicamba:2,4-D(1:3)VH16–32 oz (0.5–1 lb)VH1%VH4–8 oz (0.125–0.75 lb)dicamba 12–24 oz (0.375–0.75 lb)2, 4-D, 4 lb/gal productVH0.25% dicamba 0.75 % 2,4-D(4 lb/gal product)picloram:2,4-D (1:4),(3.8 lb/gal product)VH11–16 oz(0.3–0.5 lb)VH0.63%picloram:2,4-D (1:4),(2.5 lb/gal product)VH16–24 oz(0.3–0.5 lb)VH1%VH8–24 oz (0.0625–0.1875 lb)picloram 8–24 oz (0.25–0.75 lb) 2,4-D4 lb/gal productVH0.25% picloram 0.5% 2,4-D(4 lb/gal product)VHRate 1–Rate 2—Because of metsulfuron methyl in theformulation, these herbicides are notrecommended on bahiagrass pastures forweed control.VH24–32 oz (0.25–0.33 lb)VH1%Use high end of rate range for camphorweed, marshelder, and smartweed.dicamba 2,4-D amineor low volatile esterpicloram 2,4-D amineor low volatile estermetsulfuron methyldicamba:2,4-D(1:3)picloram:fluroxypyr (1:1)Spring–summerDo not use on heavy clay or caliche soils.10–25 gal/ac for ground broadcast.Thoroughly wet foliage forindividual plant treatment. Add32–64 oz surfactant/100 gal water.Late Sept–Oct(to first frost)Apply to fall regrowth that is in goodgrowing condition. Recommend usingindividual plant treatment when growingwith desirable vegetation to reduce nontarget damage. Imazapyr is a non-selectiveherbicide and will kill or damage desirablevegetation if sprayed.2–4 gal water for aerial spray; 10–25gal water for ground broadcastapplication. Thoroughly wet foliagefor individual plant treatment. Add32–64 oz surfactant/100 gal water.Spring, weeds4–6 in. high, goodmoisture conditions.Spray thistles inrosette stage.With 2,4-D, use the amine formulation inareas with 25 in. of rainfall or more and theester formulation in drier areas where nosusceptible crops are nearby.For western bitterweed control, use 2,4-Dlow volatile ester or amine at 32 oz/ac beforeplants flower, temperature above 72 F, andsoil moisture favors plant growth. When ¾ ofplants are blooming, and/or temperature isless than 60 F, use dicamba:2,4-D (1:3), 2,4-Dplus dicamba; picloram:2,4-D (1:4), (3.8 lb/gal product), picloram:2,4-D (1:4), (2.5 lb/galproduct), aminopyralid:2,4-D (1:8) or 2,4-Dplus picloram.For prairie gerardia control, use 48 oz/acre of 2,4-D or the low rate of dicamba:2,4-D(1:3), dicamba plus 2,4-D; picloram:2,4-D(1:4), (3.8 lb/gal product), picloram:2,4-D (1:4),(2.5 lb/ gal product) or picloram plus 2,4-Dwhen plants are 4–6 in. high. Use 20 oz/acreof picloram:2,4-D (1:4), (3.8 lb/gal product;Do not apply more than 80 oz/acre per year),32 oz/acre of picloram:2,4-D (1:4), (2.5 lb/ galproduct) or 8 oz of 2,4-D/acre when plantsare 6–10 in. high before flowering.*See Table 4 for mixing information.**Treatment control ratings: VH – Very High; H – High; M – Moderate; L – Low8Table 5. Herbicides for Controlling Weeds on Rangeland
Weed controlledHerbicide (common andchemical names, Table 2)Herbicide quantity(active ingredient rate in parenthesis)Broadcast rateper acreIndividual plant/spottreatment*Berlander lobelia, bittersneezeweed, buffalobur,camphorweed, cocklebur,croton, horehound,marshelder (sumpweed,sulfaweed), prairie gerardia(see remarks), ragweed,smartweed, sunflower,thistles, western bitterweed(see remarks), westernragweed, others(continued from previouspage)triclopyr:fluroxypr (3:1)H16–24 oz (0.5–0.75 lb)VH0.5%aminopyralid:2,4-D (1:8)VH24 oz (0.70 lb)—aminopyralid:metsulfuronmethyl (1:6.2)VH2.0–3.3 oz(0.078–0.127 lb)—Broomweed (annualor common), plantain(tallowweed), wild carrot2,4-D amine or low volatileesterVH**16–32 oz (0.5–1 lb)4 lb/gal productVH1% (4 lb/gal product)VH24 oz (0.70 lb)—VH2.0-3.3 oz(0.078–0.127 lb)—VH16–32 oz (0.5–1 lb)VH1%VH4–8 oz (0.125–0.25 lb)dicamba 12–24 oz (0.375–0.75 lb)2, 4-D, 4 lb/gal productVH0.25% dicamba 0.75% 2,4-D(4 lb/gal product)picloram:2,4-D (1:4),(3.8 lb/gal product)VH11–16 oz (0.3–0.5 lb)VH0.63%picloram:2,4-D (1:4),(2.5 lb/gal product)VH16–24 oz (0.3–0.5 lb)VH1%picloram 2,4-D amineor low volatile esterVH8–24 oz (0.0625–0.1875 lb)picloram 8–24 oz (0.25–0.75 lb)2,4-D 4 lb/gal productVH0.25% picloram 0.5% 2,4-D(4 lb/gal product)picloram:fluroxypyr (1:1)VH24–32 oz (0.25–0.33 lb)VH1%triclopyr:fluroxypr (3:1)H16–24 oz (0.5–0.75 lb)VH0.5%VHRate 1–Rate 2—aminopyralid:2,4-D (1:8)aminopyralid:metsulfuronmethyl (1:6.2)dicamba:2,4-D(1:3)dicamba 2,4-D amineor low volatile estermetsulfuron methyldicamba:2,4-D (1:3)Spray volume(per acre for broadcast, asdescribed for individualplant)2–4 gal water for aerial spray; 10–25 gal water for ground broadcastapplication. Thoroughly wetfoliage for individual planttreatment. Add 32–64 ozsurfactant/100 gal water.Timeto applyRemarksSpring, weeds4–6 in. high, goodmoisture conditions.Spray thistles inrosette stage.Use high end of rate range forcamphorweed, marshelder, and smartweed.Triclopyr:fluroxypr (3:1) efficacy onsmartweed is marginal.—Because of metsulfuron methyl in theformulation, these herbicides are notrecommended on bahiagrass pastures forweed control.2–4 gal water for aerial spray; 10–25 gal water for ground broadcastapplication. Thoroughly wetfoliage for individual planttreatment. Add 32–64 ozsurfactant/100 gal water.Spring, weeds lessthan 4 in. tall, goodmoisture conditionsUse 2,4-D amine in areas with 25 in. of rainfallor more. Use 2,4-D low volatile ester in drierareas where no susceptible crops are nearby.Picloram:2,4-D (1:4), (3.8 lb/gal product): Donot apply more than 80 oz/acre per year.Because of metsulfuron methyl in theformulation, these herbicides are notrecommended on bahiagrass pastures forweed control.*See Table 4 for mixing information.**Treatment control ratings: VH – Very High; H – High; M – Moderate; L – LowTable 5. Herbicides for Controlling Weeds on Rangeland9
Weed controlledBroomweed (annualor common), plantain(tallowweed), wild carrot(continued from previouspage)Broom snakeweed(perennial broomweed)Herbicide (common andchemical names, Table 2)Herbicide quantity(active ingredient rate in parenthesis)Broadcast rateper acreIndividual plant/spottreatment*metsulfuron methylVH0.1 oz—metsulfuron:chlorosulfuron (3:1)VH0.125 oz—metsulfuron:chlorosulfuron (1:1)VH0.2 oz—VH16–32 oz (0.25–0.5 lb)VH0.5%picloram:2,4-D (1:4),(3.8 lb/gal product)VH43 oz (1.25 lb)VH0.63%picloram:2,4-D (1:4),(2.5 lb/gal product)VH64 oz (1.25 lb)VH1%picloram:fluroxypyr (1:1)VH48–96 oz (0.5–1.0 lb)VH1%picloram 2,4-D amineor low volatile esterVH16 oz (0.25 lb) picloram 16–32 oz (0.5–1 lb)2,4-D, 4 lb/gal productVH0.25% picloram 0.5% 2,4-D(4 lb/gal product)VH32 oz (1 lb)VH1%VH8 oz (0.25 lb) dicamba 24 oz (0.75 lb)2,4-D, 4 lb/gal productVH0.25% dicamba 0.75
All herbicide treatments included in this publication are also included in PestMan, which . Because the status of herbicide label clearance is subject to change, be certain . 2,4-D (2,4-dichlorophenoxy) acetic acid Weedar 64, Broad Range 55, Hi-Dep, Weedone LV4, Esteron 99, o
