Crop, Situation, and Active Chemical Formulated Material Method of Application Per Broadcast Acre Weeds Controlled Per Broadcast Acre Time of Application and Precautions COTTON For additional information on burndown see p. 21, WEED RESPONSE RATINGS FOR BURNDOWN HERBICIDES. Preplant–Burndown Apply for knockdown of existing vegetation (3 lb/gal formulations) prior to planting. Not dependent upon tem- paraquat @ 0.47 to Most emerged broadleaf weeds 32 to 40 oz/A. or 1.25 to 2.5 pt/A. After beds are formed but prior to perature for activity. Add 2,4-D or Clarity for 0.94 lb/A and grasses. Use high rate on weeds larger than planting. 2 inches. Add a surfactant (p. 3). improved control of horseweed. Add Cotoran or Diuron for improved control. Add 2,4-D or Clarity for improved control of Most emerged broadleaf and horseweed if preplant interval can be achieved. @ 0.73 lb/A Glufosinate (280 SL formulations) Prior to planting. grass weeds. 40 oz/A. Follow label for surfactant use. Use nozzles and pressure that create medium spray droplets. Use 10 gpa. Annual grasses and broadleaf (4 lb/gal formulations) Use prior to planting for vegetation Add 2,4-D or Clarity for control of horse- glyphosate @ 1 lb/A weeds. Does not control entire- 2 pt/A. weed. leaf and ivyleaf morningglories. knockdown. glyphosate + carfentrazone Improved control of morning- Glyphosate (4 lb/gal Use prior to planting for vegetation Add surfactant if glyphosate formulation formulations) + Aim 2EC does not contain one. Add 2,4-D or Clarity @ 1 lb/A + 0.016 lb/A glory and henbit. knockdown. 2 pt/A + 1.0 oz. for improved control of horseweed. glyphosate + 2,4-D @ 1 lb/A Annual grasses and broadleaf Glyphosate (4 lb/gal Adding residual such as Caparol, formulations) + 4 SL 2,4-D Amine At least 28 days prior to planting. Valor, Cotoran or Direx provides residual + 1 lb/A weeds. 2 pt/A + 2 pt/A. control of horseweed. glyphosate + 2,4-D + Glyphosate (4 lb/gal At least 30 days prior to planting. Annual grasses and broadleaf formulations) + 2,4-D + LeadOff/ rimsulfuron/thifensulfuron­ @ Some injury from LeadOff has been For horseweed use 8 oz/A . weeds. Crusher 1 + 1 + 0.25/0.25 lb/A 2 pt/A + 1.5 pt/A + 1.5 oz/A. observed. Good option for glyphosate-resistant horse- weed. Adding residual herbicide such as glyphosate + dicamba @ Annual grasses and broadleaf Glyphosate (4 lb/gal At least 21 days following 1 inch of rain- formulations) + dicamba Valor, Caparol, Cotoran or Direx provides fall prior to planting non-Xtend varieties. 1 lb/A + 0.25 lb/A weeds including horseweed. 2 pt/A + 8 oz/A. residual control of horseweed. Check plant- board rules prior to application. Glyphosate (4 lb/gal Good option for glyphosate-resistant horse- glyphosate + dicamba @ Annual grasses and broadleaf formulations) + Fexapan weed. Check Arkansas State Plant Board or Xtendimax Prior to planting Xtendflex cotton. 1 lb/A + 0.5 - 1 lb/A weeds including horseweed. 2 pt/A + 22 - 44 oz/A. website (www.aad.arkansas.gov) or updated or Engenia 12.8 oz/A regulations on dicamba applications. glyphosate + haluxifen- methyl Annual grasses and broadleaf Glyphosate (4 lb/gal At least 30 days prior to planting Good option for glyphosate-resistant horse- formulations) + Elevore @ 1 lb/A + 0.004 lb/A weeds including horseweed. 2 pt/A + 1 oz/A. cotton. weed. Add 2,4-D for control of primrose. At least 14 days for 1 oz/A or 21 days glyphosate + flumioxazin @ Annual grasses and broadleaf Glyphosate (4 lb/gal Valor is rainfast in 1 hour. Provides residual formulations) + Valor 51 WDG for 2 oz/A + 1 inch of rain prior to control of horseweed. Add Clarity for resis- 1 lb/A + 0.032 to 0.063 lb/A weeds. 2 pt/A + 1 to 2 oz/A. planting. tant horseweed. Provides residual control of horseweed and glyphosate + @ Broadleaf weeds including Glyphosate (4 lb/gal Apply 14-21 days preplant + 0.5 inch pigweed for 6 weeks after application. Knocking formulations) + Reflex 2 EC 1 lb/A + 0.25 lb/A Palmer pigweed. 2 pt/A + 1 pt/A. rainfall prior to planting. or dragging top of beds prior to planting will remove herbicide and allow weed infestation.

22 Crop, Situation, and Active Chemical Formulated Material Method of Application Per Broadcast Acre Weeds Controlled Per Broadcast Acre Time of Application and Precautions glyphosate + flumioxazin + Annual grass and broadleaf Glyphosate (4 lb/gal At least 30 days following 1 inch Provides residual control of horseweed and dicamba @ 1 lb/A + weeds including horseweed. formulations) + dicamba + of rainfall prior to planting. pigweed for 6 weeks after application. 0.063 lb/A + 0.25 lb/A Valor 51 WDG or Afforia 2 pt/A + 8 oz/A + 2 oz/A or 2.5 oz/A. glyphosate + oxyfluorfen @ Annual grass and broadleaf Glyphosate (4 lb/gal Apply late February to mid March. If planting directly into the stale seedbed, 1 lb/A + 0.25 lb/A weeds. formulations) + Goal 2XL application of Goal requires at least 30 days 2 pt/A + 1 pt/A. prior to planting and at least three ¼-inch rainfalls. If these conditions are not met, a 2-inch surface incorporation is required before planting. clethodim @ 0.12 lb/A Ryegrass and other grass Select Max 0.97 EC Postemergence. Add a surfactant. For best control of ryegrass, spray prior to weeds. 16 fl oz/A. reproductive stages with temperatures in the 50’s. Tank-mixtures with herbicides such as dicamba and 2,4-D can cause antagonism and result in reduced control.

SOYBEANS For additional information on burndown herbicides see page 21, WEED RESPONSE RATINGS FOR BURNDOWN HERBICIDES. Preplant–Burndown paraquat @ 0.47 to Annual broadleaf and grass Paraquat ( 3 lb/gal formulations) Use prior to planting on seedbeds Good spray coverage is essential. 0.94 lb/A weeds (existing vegetation). 32 to 40 oz/A. that are not to be disturbed before Adding metribuzin will increase activity. Use high rate on weeds larger than planting. Use higher rate on weeds 2 inches. Add a surfactant (p. 3). larger than 2 inches. glyphosate @ 1 lb/A Annual grasses and broadleaf Glyphosate (4 lb/gal Use prior to planting for vegetation Best results when applied in lower spray weeds (existing vegetation). formulations) knockdown. volumes, i.e., 5 to 10 gpa. Weak on morningglories. 2 pt/A. Use high rate on all but very small weeds. glufosinate @ 0.64 lb/A Good option for glyphosate- Glufosinate (280 SL formulations) Use prior to planting for vegetation Good coverage and warm weather will resistant horseweed. Annual 36 oz/A. knockdown. increase efficacy. Do not use prior to plant- grasses and broadleaf weeds ing Liberty Link soybeans. (existing vegetation). glyphosate or paraquat + Postemergence control of exist - Glyphosate (4 lb/gal formulations) At planting or prior to crop Tank mix. Apply as above. Do not use on metribuzin @ 1 lb/A or 0.47 ing annual weeds. See rating or Paraquat (2 or 3 lb/gal emergence. sensitive varieties listed on label. A list of to 0.78 + 0.25 to 0.75 lb/A table for preemergence control formulations) + Metribuzin 75DF metribuzin-tolerant varieties is available. with metribuzin. 2 pt/A or 32 to 64 oz/A or 1.8 to Avoid use on high pH soils. 3 pt/A + 0.33 to 1 lb/A DF. Add 0.25% surfactant.

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BURNDOWN – COTTON,­ SOYBEAN Crop, Situation, and Active Chemical Formulated Material Method of Application Per Broadcast Acre Weeds Controlled Per Broadcast Acre Time of Application and Precautions SOYBEANS For additional information on burndown herbicides see page 21, WEED RESPONSE RATINGS FOR BURNDOWN HERBICIDES. Preplant–Burndown [cont.] Annual broadleaf and grass weeds. Glyphosate (4 lb/gal formulations) This is a reduced rate of Canopy. Higher rates glyphosate or paraquat + Improved control of cocklebur, or Paraquat (2 or 3 lb/gal have been shown to cause injury in minimum chlorimuron/metribuzin @ hemp sesbania, morningglories, formulations) + Canopy 75DF tillage culture. Tank mix with Dual or another Prior to planting. grass herbicide, or follow this treatment with a 1 lb/A or 0.47 to 0.94 + smartweed and prickly sida. See 2 pt/A or 32 to 64 oz/A or 1.8 postemergence grass herbicide for season-long 0.188 lb/A rating table for preemergence to 3 pt/A + 6 oz/A. Add 0.25% grass control. A follow-up postemergence control with Canopy. surfactant.­ broadleaf treatment will also likely be needed. Annual broadleaf and grass weeds. Glyphosate (4 lb/gal formulations) glyphosate or paraquat + Improved control of cockle bur, or Paraquat (2 or 3 lb/gal Tank mix. Good program for burndown with /cloransulam morningglories, smart weed and @ 1 lb/A or 0.47 to 0.94 + horseweed. Additional residual formulations) + Sonic Prior to planting. residual broadleaf control. Good program for 0.13 to 0.26 lb/A control of many broad leaf weeds, 2 pt/A or 32 to 64 oz/A or 1.8 to Liberty Link soybeans. including Palmer amaranth. 3 pt/A + 3 to 6 oz/A. If planting directly into the stale seedbed, Glyphosate (4 lb/gal application of Goal requires at least 30 days glyphosate + oxyfluorfen @ Annual grass and broadleaf formulations) + Goal 2XL Apply late February to mid March. prior to planting and at least three ¼-inch 1 lb/A + 0.25 lb/A weeds. 2 pt/A + 1 pt/A. rainfalls. If these conditions are not met, a 2-inch surface incorporation is required before planting. glyphosate or paraquat + Glyphosate (4 lb/gal formulations) 2,4-D or dicamba + or Paraquat (3 lb/gal formulations) chlorimuron/tribenuron­ or + 2,4-D or dicamba + For dicamba and 2,4-D, 21 days after Burndown plus enhanced control of broadleaf Horseweed and other broadleaf Canopy EX or Valor (or other flumioxazin­ @ 1 lb/A or weeds. Valor-containing premixes) 1.0 inch rainfall, prior to planting. weeds. If horseweed is present, use at least 0.47 to 0.94 + 1 lb/A or 2 pt/A or 32 to 40 oz/A or 1.8 to 8 oz/A of dicamba. 0.25 lb/A + 0.28 to 3 pt + 2 pt/A or 8 oz/A + 1.5 to 0.37 lb/A or 0.063 lb/A 2 oz/A or 2 oz. Glyphosate (4 lb/gal Good option for glyphosate-resistant horse- formulations) + Fexapan glyphosate + dicamba @ Annual grass and broadleaf or Xtendimax Prior to planting Xtend soybean weed. Add 2, 4-D for control of primrose. 1 lb/A + 0.5 - 1lb/A weeds including horseweed. 2 pt/A + 22 - 44 oz pt/A. Visit elevoretankmix.com for approved tank- or Engenia 12.8 oz/A mix partners. glyphosate + halauxfen- Glyphosate (4 lb/gal Good option for glyphosate-resistant. Annual grass and broadleaf At least 14 days prior to planting Check Arkansas State Plant Board website methyl @ 1 lb/A + weeds including horseweed. formulations) + Elevore soybean (www.aad.arkansas.gov) for updated regula- 0.004 1lb/A 2 pt/A + 1 oz/A. tions on dicamba applications. glyphosate + thifensulfuron/ Glyphosate (4 lb/gal Immediately prior to planting. Label Improved control of garlic, curly formulations) + requires application be made at least Burndown plus enhanced control of broadleaf tribenuron @ 1 lb/A + 0.016 dock, smartweed and henbit. FirstShot SG weeds. to 0.025 lb/A 2 pt/A + 0.5 to 0.8 oz/A. 7 days prior to planting. Glyphosate (4 lb/gal glyphosate + carfentrazone Improved control of morning- formulations) + Aim 2 EC At planting or prior to crop emergence. Good spray coverage is essential. @ 1 lb/A + 0.016 lb/A glories. 2 pt/A + 1 oz/A. glyphosate + 2,4-D + Henbit, grasses and broad- Glyphosate (4 lb/gal At least 30 days prior to planting. For horseweed, substitute dicamba 8 oz/A rimsulfuron/thifensulfuron­ formulations) + 2,4-D + Leadoff Recommend planting STS or BOLT for 2,4-D. See label for specific plant-back @ 1 + 1 + 0.25/0.25 lb/A leaves. 2 pt/A + 1.5 pt/A + 1.5 oz/A. soybeans to avoid risk of injury. intervals to soybean. Glyphosate + halsulfuron + Glyphosate (4 lb/gal formulations) thifensulfuron @ 1 + .031 to Sedges and smartweed. + Permit Plus 75 WG Up to 21 days prior to planting. *STS/BOLT soybean varieties only! .062 + .004 to .008 lb/A 2pt + to 1.5 oz/A 24 Crop, Situation, and Active Chemical Formulated Material Method of Application Per Broadcast Acre Weeds Controlled Per Broadcast Acre Time of Application and Precautions clethodim @ 0.12 lb/A Ryegrass and other grass Select Max 0.97 EC Postemergence. Add a surfactant. For best control of ryegrass, spray prior to weeds. 16 fl oz/A. reproductive stages with temperatures in the 50’s. Tank-mixtures with auxin herbicides such as dicamba and 2,4-D can cause antagonism and result in reduced control. sulfentrazone + metribuzin Broadleaf weeds. Authority MTZ Up to 14 days prior to planting. Add glyphosate or paraquat for existing @ 0.225 + 0.2 lb/A 12-16 oz/A. Add 1% COC. vegetation. See soil texture chart on page 46. For higher rates, use tolerant varieties. Use 16 oz/A on clay soils. flumioxazin @ 0.063 lb/A Residual horseweed control. Valor 51 WDG Prior to soybean emergence. Apply to clean ground or tank-mix for post No post horseweed activity. 2 oz/A. weed control. Rainfall at emergence may result in injury, mainly cosmetic. flumetsulam @ 0.05 to Horseweed and other broad- Python 80 WDG Prior to planting wheat-beans. Contact and residual for horseweed. Good tank 0.066 lb/A leaves. 1 to 1.33 oz/A. mix with glufosinate. Good option where horse- weed is present less than 14 days prior to planting. flumioxazin + chlorimuron/ Residual horseweed control. Envive or Enlite WDG Prior to soybean emergence. Use 2.8 oz/A Enlite on high pH soils. thifensulfuron 3.5 or 2.8 oz/A. @ 0.022 to Horseweed rapid burndown – Sharpen 2.85 SC Prior to soybean emergence. 30 days Tank mix with glyphosate, 1% MSO and 0.044 lb/A regrowth will occur. 1 to 2 oz/A. prior to plant depending on rate 2% v/v of AMS or UAN for best activity. applied and soil type. 30-day plant back on coarse soils. saflufenacil + Horseweed burndown and Verdict 5.57 EC Prior to planting to preplant. 30 days Tank mix with glyphosate, 1% MSO and @ 0.022 to 0.044 + 0.2 to ­residual control. 5 to 10 oz/A. prior to plant depending on rate 2% v/v of AMS or UAN for best activity. 0.4 lb/A applied and soil type. flumioxazin + thifensulfuron Residual horseweed control. No Afforia 50.8 WDG Prior to soybean emergence. Up to 3 Apply to clean ground or tank-mix for post + tribenuron@ 0.063 + post horseweed activity. Post activ- 2.5 oz/A. days after planting. weed control. Rainfall at emergence may 0.008 + 0.008 lb/A ity of winter annuals and smartweed. result in injury, mainly cosmetic. flumioxazin + chlorimuron + Residual horseweed, pigweed and Trivence 61.3 DG Prior to soybean emergence. Use 6 oz/A on high pH soils. metribuzin @ 0.063 + 0.02 morningglory control. 8 oz/A. + 0.223 lb/A RICE For additional information on burndown herbicides see p. 21, WEED RESPONSE RATINGS FOR BURNDOWN HERBICIDES. Preplant-Vegetation Knockdown 2,4-D amine @ 0.5 to 1 lb/A Emerged broadleaf weeds. 2,4-D Various formulations See label for plant-back intervals. Some plants are sensitive to off-target 1 to 2 pt/A. Add 0.25% v/v nonionic movement. Therefore, avoid drift. May be surfactant. tank-mixed with glyphosate. glyphosate @ 1.0 lb/A Emerged weeds. Glyphosate (4 lb/gal Apply at least 7 days before seedbed Field must be free of standing water. formulations) preparation. 32 oz/A. saflufenacil @ 0.022 - Pigweed, mare’s tail, morning- Sharpen Prior to planting. Timing to small Tank mix with glyphosate or paraquat. Use high 0.088 lb/A glory and small-seeded broad- 1 to 4 oz/A. Must use a minimum of weeds or prior to weed emergence. water volumes for best coverage. See label for leaves. 1% v/v MSO + AMS. crop specific restrictions and limitations. glyphosate + thifensulfuron Improved control of curly dock, Glyphosate (4 lb/gal Prior to planting. Field must be free of standing water. + tribenuron @ 1.0 + 0.016 smartweed, henbit and garlic. formulations) + FirstShot 50 SG to 0.025 lb/A 32 oz/A + 0.5 to 0.8 oz/A.

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BURNDOWN – SOYBEAN,­ RICE Crop, Situation, and Active Chemical Formulated Material Method of Application Per Broadcast Acre Weeds Controlled Per Broadcast Acre Time of Application and Precautions

RICE For additional information on burndown herbicides see page 21, WEED RESPONSE RATINGS FOR BURNDOWN HERBICIDES. Preplant–Vegetation Knockdown [cont.] glyphosate + halsulfuron + Grasses, Sedges, Smartweed Glyphosate (4 lb/gal formulations) Prior to planting Applications at or immediately following plant- prosulfuron @ 1 + .031 to and other broadleaf weeds. + Gambit 79 WG ing may result in rice injury. Do not apply if pH .062 + .018 to .036 lb/A 2pt + 1 to 2 oz/A > 8.0. glyphosate + bensulfuron Improved control of yellow nut- Glyphosate (4 lb/gal Apply at least 7 days before seedbed Field must be free of standing water. @ 1.0 + 0.023 lb/A sedge, morningglory and hemp formulations) + Londax 60 DF preparation or planting. sesbania. 32 oz/A + 0.5 oz/A. glyphosate + @ Emerged weeds plus residual Glyphosate (4 lb/gal Up to 14 days prior to planting. Field must be free of standing water. 1.0 lb + 0.3-0.6 lb/A grass. formulations) Antagonism has been documented with this 32 oz tank mix. Always use full rate of glyphosate. + Command 3 ME 0.8-1.6 pt/A Medium Fine (Silt Loam) (Clay) 0.8-1.1 pt/A 1.3-1.6 pt/A Research has shown very little difference in grass control among rates within each soil type. Note: On thin soils, especially those that have been leveled, consider rates as low as 0.5 pt/A. clethodim @ 0.12 lb/A Ryegrass and other grass Select Max 0.97 EC Postemergence. Add a surfactant. 30 day plant-back to rice. For best control of weeds. 16 fl oz/A ryegrass, spray prior to reproductive stages with temperatures in the 50’s. Tank-mixtures with auxin herbicides such as dicamba and 2,4-D can cause antagonism and result in reduced control. paraquat @ 0.75 lb/A Emerged weeds. Paraquat (3 lb/gal Use high rate on weeds larger than Provides rapid desiccation of existing formulations) 2 inches. vegetation. Paraquat is sensitive to off-target 32-40 oz/A. Add 0.25% v/v movement; therefore, drift control is neces- nonionic­ surfactant. sary. Refer to label for precautions and tank- mix instructions. glyphosate + halosulfuron + Emerged weeds + enhanced Glyphosate (4 lb/gal Up to 14 days prior to planting. Field must be free of standing water. Avoid thifensulfuron @ 1.0 + sedge control. Will suppress formulations) glyphosate drift to corn. pH must be less than 8.0. 0.065 lb/A or 1.0 + 0.031 + other broadleaves. + Permit 75 WG or Permit Plus 0.004 lb/A 32 oz/A + 1 oz/A or 0.75 oz/A.

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