Tables

Table 1. Herbicide programs for Palmer amaranth control in Roundup Ready^® or Roundup Ready Flex^® cotton varieties¹.
Glyphosate Resistant	ALS Resistant	Infestation Level	Burndown²	Preemergence³	Postemergence or Postdirected⁴	Layby Directed⁵
No	No	Light	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity	Prowl or Treflan Cotoran Reflex Staple	Glyphosate + Dual Magnum (Sequence) Glyphosate + Staple Glyphosate + Envoke	Suprend + MSMA Suprend + glyphosate Valor + MSMA Valor + glyphosate Layby Pro + MSMA Layby Pro + glyphosate Aim + MSMA Aim + glyphosate
		Light	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity	Prowl + Cotoran Prowl + Reflex Prowl + Staple	Glyphosate as needed
		Heavy	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity + Valor	Prowl + Cotoran Prowl + Reflex Prowl + Staple	Glyphosate + Dual Magnum (Sequence) Glyphosate + Staple Glyphosate + Envoke
No	Yes	Light	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity	Prowl or Treflan Cotoran Reflex	Glyphosate + Dual Magnum (Sequence)	Valor + MSMA Valor + glyphosate Layby Pro + MSMA Layby Pro + glyphosate Aim + MSMA Aim + glyphosate
		Light	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity	Prowl + Cotoran Prowl + Reflex	Glyphosate as needed
		Heavy	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity + Valor	Prowl + Cotoran Prowl + Reflex	Glyphosate + Dual Magnum (Sequence)
Yes	No	Light or Heavy	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity + Valor	Prowl + Cotoran Prowl + Reflex Prowl + Staple	Glyphosate + Dual Magnum (Sequence) Glyphosate + Staple Glyphosate + Envoke	Suprend + MSMA Valor + MSMA Layby Pro + MSM Aim + MSMA
Yes	Yes	Light or Heavy	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity + Valor	Prowl + Cotoran Prowl + Reflex	No emerged Palmer: Glyphosate + Dual Magnum (Sequence) Palmer <2” Cotoran + MSMA Caparol/Cotton Pro + MSMA Linex + MSMA Cobra + MSMA Goal + MSMA	Valor + MSMA Layby Pro + MSMA Aim + MSMA
¹ Make postemergence herbicide applications before Palmer amaranth reaches 3 inches. Following label instructions for rates, adjuvants, timing, and rotational restrictions. Make only one application of ALS-inhibiting herbicide (Staple, Envoke, Suprend) per season. Make no more than two applications of PPO-inhibiting herbicides (Valor, Reflex, Cobra, Goal, Aim) per season. ² 2,4-D: 1.5 pt/A, 30-45 days prior to planting; Clarity: 8 oz/A, 1 inch of rainfall + 14 days prior to planting; Valor: 2 oz/A, 14 days prior to strip-tilling or 30 days + 1 inch of rainfall/irrigation prior to planting for conventional tillage. ³ Treflan must be incorporated. For preemergence applications, include Gramoxone Inteon if weeds are present. For heavy populations, conservation tillage with heavy residue cover has shown to improve control of Palmer amaranth. ⁴ Do not apply glyphosate to Roundup Ready® cotton varieties after the 4-leaf stage. Glyphosate can be applied to Roundup Ready Flex® varieties throughout the season, but applications may need to be post-directed later in the season for adequate coverage of weeds. Apply Envoke after cotton has a minimum of 5 true leaves. Cotoran + MSMA can be applied as a directed spray to 3-8 inch cotton. Linex and Cobra must be applied as directed sprays to cotton 6-8 inches tall. Goal must be applied as a directed spay, preferably to 8-10 inch cotton. ⁵ Apply post-directed with precision-directed spray equipment or hooded sprayer to cotton, but over-the-top to weeds. Aim and Valor can only be applied to cotton that is 16 inches tall with sufficient bark development.

Table 2. Herbicide programs for Palmer amaranth control in Liberty-Link^® cotton varieties¹.
Glyphosate Resistant	ALS Resistant	Infestation Level	Burndown²	Preemergence³	Postemergence or Postdirected⁴	Layby Directed⁵
Yes or No	No	Light	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity	Prowl or Treflan Cotoran Reflex Staple	Palmer < 2 inches Ignite as needed Ignite + Dual Magnum Palmer < 4 inches Ignite + Staple	Suprend + MSMA Valor + MSMA Layby Pro + MSMA Aim + MSMA
		Light	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity	Prowl + Cotoran Prowl + Reflex Prowl + Staple	Palmer < 2 inches Ignite as needed Palmer < 4 inches Ignite + Staple
		Heavy	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity + Valor	Prowl + Cotoran Prowl + Reflex Prowl + Staple	Palmer < 2 inches Ignite as needed Ignite + Dual Magnum Palmer < 4 inches Ignite + Staple
Yes or No	Yes	Light	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity	Prowl or Treflan Cotoran Reflex	Palmer < 2 inches Ignite as needed Ignite + Dual Magnum	Valor + MSMA Layby Pro + MSMA Aim + MSMA
		Light	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity	Prowl + Cotoran Prowl + Reflex	Palmer < 2 inches Ignite as needed
		Heavy	Glyphosate or Gramoxone Inteon + 2,4-D or Clarity + Valor	Prowl + Cotoran Prowl + Reflex	Palmer < 2 inches Ignite as needed Ignite + Dual Magnum
¹ Apply before Palmer amaranth reaches 2 inches. Following label instructions for rates, adjuvants, timing, and rotational restrictions. Make only one application of ALS-inhibiting herbicide (Staple, Envoke, Suprend) per season. Make no more than two applications of PPO-inhibiting herbicides (Valor, Reflex, Cobra, Goal, Aim) per season. ² 2,4-D: 1.5 pt/A, 30-45 days prior to planting; Clarity: 8 oz/A, 7-21 days prior to planting; Valor: 2 oz/A, 14 days prior to strip-tilling or 30 days + 1 inch of rainfall/irrigation prior to planting for conventional tillage. ³ Treflan must be incorporated. For preemergence applications, include Gramoxone Inteon if weeds are present. ⁴ Ignite can be applied to Liberty-Link® cotton varieties as an over-the-top foliar spray or as a directed spray to the lower 1/3 of the cotton stand from emergence up to the early bloom stage. It may need to be post-directed later in the season for adequate coverage of weeds. Do not apply more than 58 oz/acre of Ignite per season. A single application of Ignite will provide no more than 85-90% control of emerged Palmer amaranth. ⁵ Apply post-directed with precision-directed spray equipment or hooded sprayer to cotton, but over-the-top to weeds. Aim and Valor can only be applied to cotton that is 16 inches tall with sufficient bark development.