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Burndown Herbicides See P

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Burndown Herbicides See P 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 herbicides see p. 21, WEED RESPONSE RATINGS FOR BURNDOWN HERBICIDES. Preplant–Burndown Apply for knockdown of existing vegetation Paraquat (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. glufosinate @ 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 Glyphosate (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 herbicide 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 dicamba. 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 + fomesafen @ 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 auxin 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. 23 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 sulfentrazone/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.
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