Weed management
Michael W. Marshall
General Information
Weed management is an integral part of soybean production. Weed management systems should prevent weed interference, be economical and sustainable, reduce the weed seed bank in soil, prevent weed resistance and neither injure soybean plants or reduce yield. Weeds compete with soybean for moisture, nutrients, and sunlight. To be successful, weed management systems require advance planning and timely execution. Proper weed identification is essential to selecting the correct herbicide. Any delay in an application may mean reduced control, higher herbicide use rates, and greater herbicide costs.
A successful weed management plan will use multiple methods to keep weed populations low. Tillage and seedbed preparation should eliminate all emerged weeds prior to planting. Components of a weed management system can include many of the following: 1) Early preplant burndown which may contain a herbicide with residual activity; 2) Burndown application at planting which may include a residual herbicide; 3) Postemergence applications with or without a residual herbicide; 4) Pre-harvest applications.
The use of mechanical cultivation with rotary hoes, rolling cultivators or sweeps may reduce the need for a herbicide application early in the growing season. Use of specific herbicides depends on the weed spectrum of your field, economic considerations and application system. Consider your situation and tailor a weed control program to your needs. The following sections will guide you in the decision making process.
Roundup ReadyTM Soybean
Roundup ReadyTM (RR) soybean has been widely adopted by South Carolina growers. The following topics should be considered when growing RR soybean.
- Use a soil-applied herbicide. Do not delay making applications with hopes of a single application being sufficient for season-long weed control. Glyphosate will generally need to be applied14 days after soybean emergence to prevent early-season yield loss from weed competition. Florida pusley, dayflower, nutsedge, and morningglories are less susceptible to glyphosate and generally require multiple applications for effective control. Use of a soil-applied herbicide will provide greater flexibility in timing of glyphosate applications.
- Use crop rotation or at least rotation of herbicide systems to reduce the potential for development of glyphosate resistance. Roundup ReadyTM technology should be used only as a weed management tool. Continued use of glyphosate in soybean and other RR rotational crops will increase the likelihood of selecting for glyphosate resistant weeds.
- Glyphosate is formulated as a salt, thus making the product highly water-soluble. High concentrations of sodium (Na) salts are common in some South Carolina water sources and may reduce weed control by binding to glyphosate. The addition of 8.5 lbs of ammonium sulfate (AMS) per 100 gallons of water will help over come this antagonism. When the spray volume is reduced from 20 to 10 gallons/acre, the number of salt molecules that could potentially interact with glyphosate is reduced by 50%. In addition, spray droplet size will be reduced as spray volume is lowered, concentrating glyphosate molecules within the droplet, facilitating glyphosate movement into the plant via diffusion.
Herbicide Programs to Manage ALS- and Glyphosate-Resistant Palmer Amaranth in Soybean1
Palmer amaranth populations exist in South Carolina that are resistant to acetolactate synthase (ALS) inhibiting herbicides (i.e., Harmony, Classic, and Python) and dinitroaniline (yellow) herbicides (i.e., Prowl, Treflan, and Sonalan). Recently, glyphosate-resistant Palmer amaranth populations have been confirmed in South Carolina. The following table is designed to aid producers in managing and/or preventing glyphosate-resistant Palmer amaranth populations in soybean.
Currently, our PPO-inhibitors (i.e., Valor, Reflex, Flexstar, Ultra Blazer, and Cobra) do an excellent job of controlling ALS- and glyphosate-resistant Palmer amaranth biotypes, but our concern is that resistance may develop to the PPO-inhibitors from over-use since these herbicides are now used in all of our major row crops (corn, cotton, soybean, and peanuts) in South Carolina. Programs, such as LibertyLink, will help preserve the utility of PPO-inhibitors for the short-term.
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Seed Program |
PRE |
1st POST2 |
2nd POST |
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Roundup Ready |
Valor SX4 or Reflex4 |
glyphosate + Reflex4 or glyphosate + Flexstar4 or glyphosate + Ultra Blazer4 or glyphosate + Cobra4 or Sequence |
If needed3 |
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Valor XLT4 or Prefix4 or Envive4 |
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Dual Magnum, Intrro, Outlook, Prowl5 |
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LibertyLink |
Valor SX4 or Reflex4 |
Ignite + Reflex4 or Ignite + Flexstar4 or Ignite + Ultra Blazer4 or Ignite + Cobra4
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If needed3 |
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Valor XLT4 or Prefix4 or Envive4 |
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Dual Magnum, Intrro, Outlook, Prowl5 |
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Conventional |
Prowl5, Valor SX4, Valor XLT4, or Reflex4 |
Reflex4 or Ultra Blazer4 or Cobra4 |
If needed3 |
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Canopy or Sencor6, Intrro, Dual Magnum, Outlook, Boundary, or Prowl5 |
Reflex4 or Ultra Blazer4 or Cobra4 |
Reflex4 or Ultra Blazer4 or Cobra4 |
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Prefix4 |
Reflex4 or Ultra Blazer4 or Cobra4 |
If needed3 |
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1Glyphosate- and ALS-resistant Palmer amaranth is a very serious concern in South Carolina. An aggressive program is necessary to slow the spread of resistant biotypes and reduce selection pressure on non-resistant populations. 2When applied in combination with glyphosate (Roundup Ready) or Ignite (LibertyLink), use 12 oz/A of Reflex or Flexstar, 1.0 pt/A of Ultra Blazer, 12.5 oz/A of Cobra. Applications should be made before Palmer amaranth exceeds 2 inches in height. 3A second postemergence application may not be needed. If Reflex or was applied earlier, use Ultra Blazer or Cobra for a second application (If Roundup Ready, include glyphosate if needed for additional weeds). Do not make a second application of Reflex. Reflex may be preferred because of residual control of Palmer amaranth. 4Valor, Valor XLT (Valor + Classic), Envive (Valor + Harmony + Classic), Cobra, Prefix (Reflex + Dual Magnum), Reflex, Flexstar, and Ultra Blazer have the same mode of action (PPO inhibitor). Therefore, do not make more than 2 applications of these herbicides in a single season. 5If Palmer amaranth is not controlled by Prowl, Treflan, or Sonalan (DNA-resistance); use Dual Magnum, Outlook, or Intrro instead. 6When using Sencor or Canopy, follow label for soil pH restrictions and soybean variety tolerance. |
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Herbicides for Weed Management in Soybean
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Burndown/Preplant Herbicides for Weed Management in Soybean |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Aim 2EC (carfentrazone)
Aim 1.9EW |
1.0-2.0 oz |
0.016-0.032 lb |
Apply any time prior to planting. For best results, apply to weeds that are less than 4" tall (less than 3" rosettes). Use higher rate for treating larger weeds. Add a COC (1-2 gal/100 gals), NIS (1 qt/100 gals), or methylated seed oil (1-2 gal/100 gals). Can be tank mixed with GLYPHOSATE, IGNITE, GRAMOXONE, 2,4-D LVE, or CLARITY. MOA=14 |
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Canopy EX 29.5WDG
(chlorimuron + tribenuron)
+ 2,4-D LVE 3.8S |
1.1-3.3 oz
+ 0.5-1.0 pt |
0.016-0.047 lb + 0.004-0.014 lb
0.238-0.475 lb |
Apply 7-14 days prior to planting soybeans to weeds that less than 3" tall. If soil pH is less than 7.0, then rate range is 1.65-3.3 oz/A, use higher rate for extended residual activity. 2,4-D LVE is recommended to improve burndown activity of CANOPY EX; however, observe the more restrictive waiting interval for 2,4-D (14-30 days, depending on rate). Add either a COC (1 gal/100 gal) or NIS (1 qt/100 gal) to the spray mix. MOA=2+2 |
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Clarity 4S (dicamba)
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4.0-16 oz |
0.13-0.5 lb |
Apply 4.0-16.0 oz/A of CLARITY to control emerged broadleaf weed before soybean planting. Following an application of CLARITY and a minimum accumulation of 1" rainfall or overhead irrigation, a waiting interval of 14 days is required for 8 oz/A or less and 28 days for 16 oz/A. These intervals must be observed before planting soybeans or crop injury may occur. MOA=4 |
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Envive 41.3DF
(chlorimuron + flumioxazin + thifensulfuron) |
2.5-4.0 oz |
0.014-0.023 lb + 0.046-0.073 lb + 0.005-0.007 lb |
Apply 7-14 days before soybean planting. To ensure proper coverage of target weeds (1-3" tall), use 10 to 30 gallons of spray solution per acre. ENVIVE may be tank mixed with 2,4-D LVE, GLYPHOSATE, CLARITY, or GRAMOXONE. If tank mixing with 2,4-D LVE, observe the more restrictive waiting interval for (14-30 days, depending on rate). MOA=2+14+2 |
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ET 0.208EC (pyraflufen ethyl) |
0.5-2.0 oz |
0.0008-0.003 lb |
Soybeans may be planted any time after ET application. For best result, apply ET to broadleaf weeds less than 4" tall (less than 3" rosettes). Ground application requires minimum of 10 gallons/A. Do not allow livestock to graze in treated areas. MOA=14 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Burndown/Preplant Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions |
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Gangster V 51WDG (flumioxazin)
+ Gangster FR 84DF (chloransulam) |
2.5-3.0 oz
+ 0.5-0.6 oz |
0.080-0.096 lb
+ 0.026-0.032 lb
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GANGSTER is a co-pack of GANGSTER V and GANGSTER FR. Apply a minimum of 14 days before planting soybeans. For enhanced residual control of grass weeds in reduced tillage fields, tank mix with PROWL or COMMAND. If weeds are present, tank mix with GLYPHOSATE, GRAMOXONE, or 2,4-D LVE. Areas (i.e., in the crop rows) that are excessively disturbed by the planting operation may see diminished weed control. MOA=2+2 |
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Glyphosate acid equivalent (ae) 3 lb ae/gal 4 lb ae/gal 4.17 lb ae/gal 4.5 lb ae/gal |
32-160 oz 24-120 oz 23-115 oz 22-106 oz |
0.75-3.8 lb ae |
Apply in 10-20 gal of water 2 to 4 weeks prior to your anticipated planting date to control existing groundcover. In most fields, a follow-up application of GRAMOXONE will be needed at planting. Consult product label to determine if a non-ionic surfactant is needed. MOA=9 |
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Gramoxone Inteon 2E (paraquat)
paraquat 3S |
2.0-4.0 pt
1.5-2.0 pt
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0.5-1.0 lb
0.5-0.75 lb |
GRAMOXONE is a RESTRICTED USE PESTICIDE. Apply at planting as a follow-up to an earlier application of GLYPHOSATE. Better control of chickweed, henbit, deadnettle and cutleaf eveningprimrose than GLYPHOSATE. Add NIS at 1 qt/100 gal of spray mix. MOA=22 |
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Ignite 280 2.34S (glufosinate) |
29-36 oz |
0.53-0.66 lb |
Thorough spray coverage is essential for optimum performance. Ground application requires a minimum of 15 gallons/acre. Dense weed canopies require 20 to 40 gallons/acre. See label for further application instructions and tank-mix partners. MOA=10 |
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Prefix 5.29EC
(s-metolachlor + fomesafen) |
2.0 pt |
1.09 lb + 0.23 lb |
Apply up to 15 days prior to planting soybeans. If weeds are present, tank mix with GLYPHOSATE or GRAMOXONE. Areas (i.e., in the crop rows) that are excessively disturbed by the planting operation may see diminished weed control. MOA=14+15 |
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Valor SX 51WDG (flumioxazin) |
2.0-3.0 oz |
0.064-0.096 lb |
Apply a minimum of 14 days before planting soybeans. For enhanced residual control of weeds in reduced tillage fields, tank mix with BOUNDARY, AXIOM, MICRO-TECH, DUAL, or OUTLOOK. If weeds are present, tank mix with GLYPHOSATE or GRAMOXONE. Areas (i.e., in the crop rows) that are excessively disturbed by the planting operation may see diminished weed control. MOA=14 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Burndown/Preplant Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions |
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Valor XLT 40.3WDG
(flumioxazin + chlorimuron)
|
3.0-5.0 oz |
0.057-0.094 lb + 0.019-0.032 lb |
Apply a minimum of 14 days prior to planting soybeans. For enhanced residual control of weeds in reduced tillage fields, tank mix with BOUNDARY, AXIOM, MICRO-TECH, DUAL, or OUTLOOK. If weeds are present, tank mix with GLYPHOSATE or GRAMOXONE. Areas (i.e., in the crop rows) that are excessively disturbed by the planting operation may see diminished weed control. MOA=14+2 |
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2,4-D LVE 3.8S (various) |
1.0-2.0 pt |
0.475-0.95 lb |
Apply 14 (1.0 pt/A) to 30 days (2.0 pt/A) prior to planting soybeans. Do not use on a light, sandy soil, or where soil moisture is limiting weed growth. Very effective on cutleaf eveningprimrose, wild mustard, and Palmer amaranth. Can be tank-mixed with other burndown herbicides (see label). MOA=4 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Preplant Incorporated (PPI) Herbicides for Weed Management in Soybean |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions |
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Prowl 3.3EC (pendimethalin)
Prowl H2O 3.8EC |
1.2-2.4 pt
1.05-2.1 pt |
0.5-1.0 lb
0.5-1.0 lb |
Use to control annual grasses, seedling johnsongrass and Florida pusley. For best results, apply and incorporate immediately with a field cultivator or Do-all. A second incorporation generally improves weed control. MOA=3 |
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Sonalan 3EC (ethalfuralin) |
1.5-2.5 pt |
0.56-0.94 lb |
Apply SONALAN 2.0 to 3.0 pt/A for rhizome johnsongrass control. For better pigweed control, use 1.5 pt/A on coarse-textured soils and 2.0 pt/A on medium-textured soils. Incorporate to a depth of 2 to 3 inches immediately after application. Cross disk for best results. MOA=3 |
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Treflan 4EC (trifluralin)
and other trade names |
1.0-2.0 pt |
0.5-1.0 lb |
Controls annual grasses and some small-seeded broadleaf weeds, seedling johnsongrass; poor control of large-seeded broadleaf weeds. Use 2.0 to 3.0 pt/A for rhizome johnsongrass control. For better pigweed control, use 1.5 pt/A on coarse-textured soils and 2.0 pt/A on medium-textured soils. Incorporate to a depth of 2 to 3 inches immediately after application. Cross disk for best results. MOA=3 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Preemergence (PRE) Herbicides for Weed Management in Soybean |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Axiom 68DF
(flufenacet + metribuzin) |
7.0-13.0 oz |
0.24-0.44 lb + 0.06-0.11 lb |
Controls crabgrass, goosegrass, fall panicum, spurge, and purslane. Tank mix with SCEPTOR, CANOPY, COMMAND, FIRSTRATE, or PURSUIT to broaden the spectrum of weed control. Do not apply more than 13 oz/A/season. MOA=15+5 |
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Boundary 6.5EC
(s-metolachlor + metribuzin) |
1.2-2.1 pt |
0.79-1.38 lb + 0.19-0.33 lb |
Controls Florida pusley, crabgrass, crowfootgrass, pigweed spp., and bristly starbur. Use rate is dependent on soil type, check label for details. BOUNDARY contains metribuzin which has the potential to injure sensitive soybean varieties, consult seed dealer regarding injury potential. Do not use BOUNDARY in conjunction with soil-applied organophosphate insecticides. MOA=15+5 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Preemergence (PRE) Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Canopy 75DF
(metribuzin + chlorimuron) |
6.0-8.0 oz |
0.24-0.32 lb + 0.04-0.05 lb |
Controls glyphosate-resistant Palmer amaranth, prickly sida, and wild mustard, and several other broadleaf weeds. Tank mix with alachlor, metolachlor, or pendimethalin for improved grass control. Use lower rate on sandy soils. CANOPY contains metribuzin which has the potential to injure sensitive soybean varieties, consult seed dealer regarding injury potential. Do not use CANOPY with soil-applied organophosphate insecticides. MOA=5+15 |
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Command 3ME (clomazone) |
2.0-3.33 pt |
0.75-1.25 lb |
Controls crabgrass, fall panicum, Texas panicum, velvetleaf, spurred anoda, annual morningglory, and prickly sida. Provides only marginal suppression of most other broadleaf weeds (Palmer amaranth). May be tank mix with other herbicides to broaden weed spectrum. Do not apply in the air or within 1200 ft of housing developments, commercial fruit, vegetable, or nut production, or commercial ornamental nurseries or greenhouses. MOA=13 |
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Dual Magnum 7.62EC (s-metolachlor) |
1.0-1.33 pt |
0.95-1.27 lb |
Excellent control of annual grasses and small seeded broadleaves. Tank mix with LOROX, CANOPY, SCEPTER, PURSUIT, or SENCOR to improve spectrum of weed control. MOA=15 |
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Envive 41.3DF
(chlorimuron + flumioxazin + thifensulfuron) |
2.5-4.0 oz |
0.014-0.023 lb + 0.046-0.073 lb + 0.005-0.007 lb |
Controls tropic croton, ALS- and glyphosate-resistant Palmer amaranth, and Florida beggarweed. A single postemergence application in soybeans of CLASSIC or SYNCHRONY XP at up to 0.75 oz/A after preemergence application of ENVIVE. For grass weeds, tank mix with PROWL. Do not apply ENVIVE 14 days before or after a soil organophosate application unless soybean variety is STS or STS/RR. MOA=2+14+2 |
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Gangster V 51 WDG (flumioxazin)
+
Gangster FR 84DF (chloransulam) |
1.5-3.0 oz
+
0.3-0.6 oz |
0.048-0.096 lb
+
0.016-0.032 lb
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GANGSTER is a co-pack of GANGSTER V and GANGSTER FR. Apply at planting or within 3 days of planting. Controls Florida beggarweed, ALS- and glyphosate-resistant Palmer amaranth, and annual morningglories. For grass weeds, tank mix with PROWL. Do not apply more than 3.0 oz/A of GANGSTER V and 0.6 oz/A of GANGSTER FR per growing season. MOA=2+2 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Preemergence (PRE) Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Intrro 4EC (alachlor)
Micro-Tech 4ME
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2.0-2.75 qt
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2.0-2.75 lb
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MICRO-TECH and INTRRO are RESTRICTED USE PESTICIDES. Excellent control of annual grasses and small seeded broadleaves. Performance on Palmer amaranth slightly better than PROWL. Tank mix with LOROX, CANOPY, SCEPTER, PURSUIT, or SENCOR to improve spectrum of weed control. MOA=15 |
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Lorox 50DF (linuron)
Linex 4L |
1.0-2.0 lb
1.0-2.0 pt |
0.5-1.0 lb |
Controls Florida beggarweed, crabgrass, common ragweed, and pigweed. Rate is dependent on soil type, consult label for details. Weak on annual morningglories. For improved sicklepod control, tank mix with SENCOR. Plant soybean at least 1" deep to prevent crop injury. MOA=7 |
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Outlook 6EC (dimethenamid-p)
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12-18 oz |
0.56-0.84 lb |
Controls many annual grasses, pigweeds, and spotted spurge. Tank mix with LOROX, COMMAND, FLEXSTAR, CANOPY, SCEPTER, FIRSTRATE, or SENCOR to improve spectrum of weed control. MOA=15 |
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Prefix 5.29EC
(s-metolachlor + fomesafen) |
2.0 pt |
1.09 lb + 0.23 lb |
Excellent control of glyphosate- and ALS-resistant Palmer amaranth, bristly starbur, and crabgrass. Apply during or immediately after planting before soybeans or weeds emerge. Dry weather after application may reduce PREFIX effectiveness. If weeds develop, cultivate with a rotary hoe that will not damage seedling soybeans. MOA=15+14 |
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Prowl 3.3EC (pendimethalin)
Prowl H2O 3.8EC
|
1.8-2.4 pt
1.5-2.0 pt |
0.74-0.99 lb
0.71-0.95 lb |
Controls annual grasses and small-seeded broadleaf weeds. Apply at planting or up to 2 days after planting. If your field has a history of poor Palmer amaranth control with yellow herbicides, consider tank mixing with SENCOR or VALOR. Good control of Florida pusley. Effective for Brazil pusley emerging from seed but not effective against plants growing from root stock. MOA=3 |
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Pursuit 70DF (imazethapyr)
Pursuit 2AS |
1.44 oz
4.0 oz |
0.063 lb |
Controls annual broadleaf weeds and provides some nutsedge suppression. Tank mix with PROWL, DUAL MAGNUM, or OUTLOOK to improve performance on annual grasses. PURSUIT should only be applied once per season to soybeans. Do not apply CLASSIC, CANOPY, or SCEPTER to field previously treated with PURSUIT. MOA=2 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Preemergence (PRE) Herbicides for Weed Management in Soybean (cont)
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Pursuit Plus 2.9EC
(imazethapyr + pendimethalin) |
2.5 pt |
0.063 lb + 0.84 lb |
Controls several annual broadleaf and grass weeds. PURSUIT should only be applied once per season to soybeans. Do not apply CLASSIC, CANOPY, SQUADRON, SYNCHRONY, or SCEPTER to field previously treated with PURSUIT PLUS. MOA=2+3 |
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Python 80WDG (flumetsulam) |
0.89-1.14 oz |
0.045-0.057 lb |
Controls several annual broadleaf weeds including common lambsquarters, pigweed species, and prickly sida; generally provides adequate control of light to moderate infestations of Florida beggarweed, common ragweed, and sicklepod. Marginal control of annual morningglory. Tank mix with PROWL, OUTLOOK, or DUAL MAGNUM to broaden the spectrum of weeds controlled. MOA=2 |
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Reflex 2EC (fomesafen) |
1.0-1.5 pt |
0.25-0.375 lb |
Controls glyphosate- and ALS-resistant Palmer amaranth, annual morningglory, bristly starbur, and other broadleaf weeds. Tank mix with PROWL or DUAL MAGNUM for increased grass activity. Do not exceed 1.5 pt/A (0.375 lb ai/A) of REFLEX per calendar year. MOA=14 |
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Scepter 70DF (imazaquin)
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2.8 oz
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0.12 lb
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Controls Florida beggarweed, annual morningglory, glyphosate-resistant Palmer amaranth, and Florida pusley. Tank mix with PROWL, TREFLAN, OUTLOOK, or other labeled herbicide for grass control. Do not apply CLASSIC, CANOPY, SQUADRON, SYNCHRONY, PURSUIT PLUS, or PURSUIT to field previously treated with SCEPTER. MOA=2 |
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Sencor 75DF (metribuzin)
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0.33-0.5 lb |
0.25-0.375 lb |
Controls small seeded broadleaf weeds including ALS- and glyphosate-resistant Palmer amaranth. Tank mix with PROWL, INTRRO, DUAL MAGNUM, or other labeled herbicide for grass control. There are restrictions concerning the texture and organic matter content of soils where this product is to be used. Use the lower rate on soils classified as sandy loam or loamy sand (less than 1.0% organic matter). Some soybean varieties are extremely sensitive to metribuzin, consult label for details. Soybean injury may occur if used in conjunction with soil-applied organic phosphate pesticides, or if heavy rains occur soon after application. MOA=5 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Preemergence (PRE) Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Squadron 2.33EC (imazaquin + pendimethalin) |
3.0 pt |
0.87 lb |
Controls Florida beggarweed, annual morningglory, glyphosate-resistant Palmer amaranth, and Florida pusley. Do not apply CLASSIC, CANOPY, SCEPTER, PURSUIT SYNCHRONY, or PURSUIT PLUS to field previously treated with SQUADRON. MOA 2+3 |
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Valor SX 51WDG (flumioxazin) |
2.0-3.0 oz |
0.064-0.096 lb |
Controls several broadleaf weeds including ALS-and glyphosate-resistant Palmer amaranth, prickly sida, and tropic croton. For control of grass weeds, tank mix with BOUNDARY, AXIOM, INTRRO, DUAL MAGNUM, or OUTLOOK. MOA=14 |
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Valor XLT 40.3WDG
(flumioxazin + chlorimuron)
|
3.0-5.0 oz |
0.057-0.094 lb + 0.019-0.032 lb |
Controls several broadleaf weeds including ALS-and glyphosate-resistant Palmer amaranth, prickly sida, and tropic croton. For control of grass weeds, tank mix with BOUNDARY, DOMAIN, INTRRO, DUAL MAGNUM, or OUTLOOK. MOA=14+2 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Postemergence (POST) Herbicides for Weed Management in Soybean |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Aim 2EC (carfentrazone)
Aim 1.9EW |
0.5-1.5 oz
|
0.008-0.023 lb
|
Apply to soybean from V3 up to the V10 stage. Controls velvetleaf, annual morningglory, and ALS- and glyphosate-resistant Palmer amaranth (up to 4" tall). May cause temporary burn, speckling, or necrosis of the soybean leaves. Add 1 qt of NIS per 100 gallons of spray solution. May be tank mixed with glyphosate for broader spectrum control in Roundup Ready (RR) soybean only. MOA=14 |
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Assure II 0.88E (quizalofop) |
5-12 oz |
0.034-0.069 lb |
Apply 7-8 oz/A overtop to control annual grasses up to 6" tall. Apply 5 oz/A to control volunteer RR-corn in RR-soybean. For control of rhizome johnsongrass, apply 5 oz of Assure II when johnsongrass is 10-24" tall and then retreat with 5 oz when regrowth reaches 6-10" tall. For bermudagrass control, apply 10-12 oz/A at 3" tall (up to 6" runners). Add COC at 1 gal/100 gallons or 1 qt/100 gallons of spray mixture. Do not exceed 18 oz/A in a growing season. Do not apply ASSURE II within 80 days of harvest or after pod set. MOA=1 |
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Basagran 4S (bentazon) |
1.5-2.0 pt |
0.75-1.0 lb |
Soybean is tolerant of BASAGRAN at all growth stages. Controls cocklebur, bristly starbur, annual morningglory, and prickly sida. At the high rate, provides temporary suppression of yellow nutsedge (regrowth is likely). May cause slight leaf burn or speckling. Treat when broadleaf weeds are small and actively growing (less than 4" tall). Adjust rate according to weed size as noted on label. Add COC at 1-2 pt/A or UAN (28-32%) at 4-8 pt/A or AMS at 2.5 lb/A. Do not apply more than 4 pt/A of BASAGRAN per season. MOA=6 |
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Classic 25DF (chlorimuron) |
0.5-0.66 oz |
0.008-0.010 lb |
Apply CLASSIC after 1st trifoliate has fully expanded up to 60 before crop maturity. Controls sicklepod, bristly starbur, and annual morningglory. CLASSIC is weak on Palmer amaranth. Include NIS at 1 qt/100 gallons or COC at 1 gal/100 gallons spray solution. May be tank mixed with glyphosate for broader spectrum control in RR-soybean (use a lower CLASSIC rate at 0.25-0.33 oz/A). Do not tank mix CLASSIC with organophosate insecticide or do not apply CLASSIC within 14 days of an application of organophosate insecticide as severe crop injury may occur. MOA=2 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Postemergence (POST) Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Cobra 2EC (lactofen) |
12.5 oz |
0.2 lb |
Apply to soybeans anytime, but do not apply later than 45 days before harvest or after the R6 (full seed set). Controls ALS- and glyphosate-resistant Palmer amaranth (less than 4" tall), annual morningglory, Florida pusley, and bristly starbur. May cause temporary leaf burn, bronzing, or speckling. Add 1-2 pt COC per 100 gallons of spray solution plus 2-4 lb/A of AMS. Do not exceed 25 oz/A of COBRA per season. Do not apply under stress conditions. MOA=14 |
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FirstRate 84WDG (chloransulam-methyl)
|
0.3 oz |
0.016 lb |
FIRSTRATE may be applied anytime after emergence up to the 50% flowering stage. Controls bristly starbur, annual morningglory, common ragweed, and sicklepod. Weak on Palmer amaranth. For best results, treat morningglory before begins sending out runners. Applications made to sicklepod beyond the 1-leaf stage will likely result in reduced control. A second 0.3 oz/A FIRSTRATE application may be necessary 7-10 days afterward to control sicklepod. Add 1-2 pt NIS plus 2.5 gal UAN or COC at 1.2 gal or MSO at 1.2 plus 2.5 gal UAN per 100 gallon of spray solution. Application prior to full emergence of the first soybean trifoliate leaf may cause temporary yellowing or chlorosis. FIRSTRATE may be tank mixed with glyphosate to broaden the spectrum of weed control (reduce FIRSTRATE rate to 0.15-0.3 oz) in RR-soybean. MOA=2 |
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Flexstar 1.88SC (fomesafen + adjuvants)
Reflex 2EC (fomesafen) |
1.0-1.5 pt
1.0-1.5 pt |
0.24-0.35 lb
0.25-0.38 |
Controls annual broadleaf weeds such as cocklebur, ALS- and glyphosate-resistant Palmer amaranth, and annual morningglory. Add NIS at 1-2 qt or COC at 0.5-1.0 gallons per 100 gallons of spray solution. Do not apply after soybeans begin blooming. Do not exceed 1.5 pt per acre per season. MOA=14 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Postemergence (POST) Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Frontrow
84WDG + 51WDG
(chloransulam + flumetsulam) |
0.3 oz + 0.12 oz |
0.016 lb + 0.006 lb |
FRONTROW is a co-package product of FIRSTRATE and PYTHON. Apply 1 over-pack (contains 1.5 oz of FIRSTRATE and 0.6 oz of PYTHON which treats 5 acres) anytime from 1st trifoliate to full bloom. Controls annual broadleaf weeds including annual morningglory, bristly starbur, and sicklepod. Add NIS at 2 pt or COC at 1.2 gallons per 100 gallons of spray solution. Tank mix with FLEXSTAR, COBRA, ULTRA BLAZER, GLYPHOSATE (RR-soybeans only), ASSURE II (for grass control), or PURSUIT. Do not apply within 70 days harvest. MOA=2+2 |
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Fusilade DX 2EC (fluazifop-p-butyl) |
8-12 oz |
0.125-0.188 lb |
Controls annual and perennial grasses before they exceed 6-8" tall. For rhizome johnsongrass control, apply 12 oz/A when it is 8-18" tall. Make a second application (8 oz/A) when regrowth is 6-12" tall. For bermudagrass, apply 12 oz/A when runners are 4-8" long, and repeat 8 oz/A when re-growth reaches 4-8". Add COC at 1 gal/100 gallon or NIS 2 pt/100 gallon of spray solution. Controls volunteer corn in conventional and RR-soybean. MOA=1 |
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Fusion 2.56EC
(fluazifop-p-butyl + fenoxaprop-p-ethyl) |
8-12 oz |
0.16-0.24 lb |
Apply 8 oz/A for control of most annual grasses before they exceed 6-8" tall. For rhizome johnsongrass, apply 10-12 oz/A for control of johnsongrass 8-18" tall. A second 8 oz/A treatment may be applied to control regrowth 6-12" tall. For bermudagrass, treat 4-8" runners with 12 oz/A, and then apply a second application of 8 oz/A to 4-8" re-growth. Add COC at 1 gal/100 or NIS at 2 pt/100 gallon of spray solution. Controls volunteer corn in conventional and RR-soybean. MOA=1+1 |
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Glyphosate acid equivalent (ae)
3 lb ae/gal.
4 lb ae/gal.
4.5 lb ae/gal. |
32-48 oz
24-35 oz
22-44 oz |
0.75-1.5 lb ae |
USE ONLY ON SOYBEAN VARIETIES DESIGNATED AS ROUNDUP READY! Apply from emergence through flowering growth stage. Controls annual grasses and broadleaf weeds. Will not control glyphosate-resistant Palmer amaranth. Can be applied from cracking up through full flowering. Single or sequential applications may be made; do not exceed 2.25 lb ae/A per growing season. May be tank mixed with many other herbicides to improve control on annual morningglory (i.e. FIRSTRATE). MOA=9 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Postemergence (POST) Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Harmony GT XP 75DF (thifensulfuron-methyl)
Harmony SG 50DF |
0.083 oz
0.125 oz |
0.004 lb |
Apply to soybeans any time after the first trifoliate has fully expanded, but no later than 60 days before harvest. Controls glyphosate-resistant Palmer amaranth up to 8" tall (will not control ALS-resistant Palmer amaranth). Add NIS at 1-2 pt /100 gallons or COC at 4 pt/100 gallons of spray solution plus nitrogen fertilizer solution (UAN, 28%) at 2-4 qt/A or AMS at 2-4 lb/A. Do not tank mix HARMONY GT XP with organophosate insecticide or do not apply HARMONY GT XP within 14 days of an application of organophosate insecticide as severe crop injury may occur. NOTE: HARMONY GT XP rate can be increased up to 0.33 oz/A IF applying OVER-THE-TOP a STS SOYBEAN VARIETY. MOA=2 |
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Ignite 280SL 2.34S
(glufosinate) |
22 oz |
0.40 lb |
USE ONLY ON SOYBEAN VARIETIES DESIGNATED AS LIBERTYLINK! Apply from emergence up to, but not including the bloom growth stage. Controls annual grasses, broadleaf weeds, and ALS- and glyphosate-resistant Palmer amaranth (less than 3" tall). Up to two over-the-top applications spaced apart by 10-14 days may be made, but do not exceed 44 oz/A per growing season. If IGNITE was used in a burndown program prior to planting, IGNITE cannot be used POST in-crop. Do not apply within 70 days of soybean harvest. Consult label regarding tank mix partners. Add AMS at 3 lb/A to the spray solution. MOA=10 |
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Poast 1.5E (sethoxydim)
Poast Plus 1E |
1.0-1.5 pt
1.5-2.25 pt |
0.19-0.28 lb |
Apply anytime during crop growth before annual grasses exceed 4-6" tall. For rhizome johnsongrass, apply 1.5 pt/A (2.25 pt/A POAST PLUS) up to 25" tall. A second 1.0 pt/A (1.5 pt/A POAST PLUS) treatment may be applied to control regrowth up to 12" tall. For bermudagrass, treat 6" runners with 1.5 pt/A (2.25 pt/A POAST PLUS), and then apply a second application of 1.0 pt/A (1.5 pt/A POAST PLUS) to 4" re-growth. Add 1 pt/A of DASH HC or SUNDANCE HC adjuvant or COC 2 pt/A. Include UAN at 4-8 pt/A or AMS at 2.5 lb/A for enhanced crabgrass activity. Consult label for tank mix partners. Controls volunteer corn in conventional and RR-soybean. MOA=1 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Postemergence (POST) Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Pursuit 70DF (imazethapyr)
Pursuit 2AS |
1.44 oz
4.0 oz |
0.063 lb |
Apply anytime after soybean emergence but before weeds exceed 3 inches. Controls bristly starbur, crabgrass, annual morningglory, and glyphosate-resistant Palmer amaranth (less than 3" tall; will not control ALS-resistant Palmer amaranth). Provides some suppression of yellow and purple nutsedge. Early application is essential for optimum weed control. Add NIS at 1.0 qt or COC at 1 gal plus UAN at 1.25-2.5 gal per 100 gal spray solution. Only one application of PURSUIT may be made during the growing season. Do not apply PURSUIT if CANOPY, SCEPTER, or PURSUIT was used as a preplant, PPI, or PRE treatment. MOA=2 |
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Raptor 1AS (imazamox) |
4.0-5.0 oz |
0.03-0.04 lb |
Apply anytime after soybean emergence but before weeds exceed 3 inches. Controls bristly starbur, crabgrass, Texas Panicum, annual morningglory, and glyphosate-resistant Palmer amaranth (less than 4" tall; will not control ALS-resistant Palmer amaranth). Use 4 oz/A rate when following a soil-applied grass herbicide (i.e., PROWL). The 5 oz/A rate should be used if no preemegence herbicide was applied. Add COC at 1 to 2 gallons/100 gallons of spray solution or a non-ionic surfactant at 1 qt/100 gallons of spray solution is required. Only one application of RAPTOR is permitted during the growing season. Do not apply more than 5 oz/A of RAPTOR per growing season. May tank mix with GLYPHOSATE (RR-soybean only), BASAGRAN, or POAST PLUS. MOA=2 |
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Resource 0.86EC (fumiclorac) |
4.0-12.0 oz |
0.027-0.081 lb |
Apply anytime after soybean emergence until 60 days before harvest. Controls annual morningglory, prickly sida, and ALS- and glyphosate-resistant Palmer amaranth (less than 4" tall). For enhanced control of annual morningglory in RR-soybeans only, add 2-4 oz/A of RESOURCE to the GLYPHOSATE tank (up to 6" vine). Apply 6-8 oz/A to control volunteer cotton in RR-soybeans, LibertyLink (LL)-soybeans, and conventional soybeans. Add COC at 1 qt/A to the final spray solution. Do not apply more than 12 oz/A in a single application or more than 16 oz/A during a single growing season. Do not apply within 60 days of harvest. MOA=14 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Postemergence (POST) Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Scepter 70DF (imazaquin) |
1.4-2.8 oz |
0.063-0.125 lb |
Apply anytime after soybean emergence (better residual results with small soybeans). Controls glyphosate-resistant Palmer amaranth (use higher rate; will not ALS-resistant), common cocklebur, and wild poinsettia. A soil active grass herbicide (PROWL, DUAL MAGNUM, or INTRRO) should follow in a separate application for grass control. Tank mix with GLYPHOSATE (RR-soybeans only) to enhance control of sicklepod and annual grass weeds. Add NIS at 1 qt per 100 gallon spray solution. Do not apply within 90 days of harvest. Do not apply to when weeds and soybeans are under stress. MOA=2 |
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Select 2EC (clethodim)
Select MAX 0.97EC |
6.0-16.0 oz
12.0-32.0 oz |
0.091-0.25 lb |
Apply anytime during crop growth before annual grasses exceed 4-6" tall. For rhizome johnsongrass, apply 8 oz/A (12-14 oz/A SELECT MAX) up to 24" tall. A second 6 oz/A (6-18 oz/A SELECT MAX) treatment may be applied to control regrowth. For bermudagrass, treat 6" runners with 8 oz/A (16 oz/A SELECT MAX), and then apply a second application of 8 oz/A (16 oz/A SELECT MAX) to 6" re-growth. Add COC at 1 qt/A plus AMS at 2.5 lb/A for enhanced johnsongrass and volunteer corn activity. Consult label for tank mix partners. Controls volunteer corn in conventional, LL-soybean, and RR-soybean. Do not apply within 60 days of harvest. MOA=1 |
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Sequence 5.25L
(glyphosate + s-metolachlor) |
2.5 pt |
0.75 lb ae + 0.94 lb |
USE ONLY ON SOYBEAN VARIETIES DESIGNATED AS ROUNDUP READY! Apply from cracking up through the 3rd trifoliate. Controls annual grasses and broadleaf weeds. s-metolachlor component provides residual grass and small seeded broadleaf weed control. Do not apply if DUAL MAGNUM or other s-metolachlor containing herbicide was applied before the SEQUENCE application. Do not exceed 3.5 pt/A in a single application or 3.5 pt/A in a single season. Do not apply within 90 days of harvest. MOA=9+15 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Postemergence (POST) Herbicides for Weed Management in Soybean (cont) |
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Rate/Acre Broadcast |
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|
Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Storm 4EC
(bentazon + aciflourfen) |
1.5 pt |
0.75 lb |
Apply to soybeans after the 2nd fully expanded trifoliate, but before weeds are exceed the 4-leaf stage (small, actively growing weeds are the key to success). Controls common cocklebur, bristly starbur, annual morningglory, tropic croton, and spurred anoda. Weak on Palmer amaranth. Add COC at 1.0 qt/A or NIS at 1.0-2.0 pt/100 gal of spray solution. Causes temporary foliar burn on soybean. Equivalent to 1 pt/A of BASAGRAN and 1 pt/A of ULTRA BLAZER. Do not apply STORM within 50 days of soybean harvest. Do not apply more than 3.0 pt/A of STORM per season. Do not apply to weeds and crop that are under stress. MOA=6+14 |
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Ultra Blazer 2L (aciflourfen) |
0.5-1.5 pt |
0.125-0.375 lb |
Apply to soybeans after the 2nd fully expanded trifoliate but before weeds exceed 4" tall (small, actively growing weeds are the key to success). Controls ALS- and glyphosate-resistant Palmer amaranth (less than 4" tall at the 1.5 pt/A rate), bristly starbur, annual morningglory, tropic croton, and spurred anoda. For control of annual morningglories, use a sequential application of ULTRA BLAZER of 1 pt/A. Add NIS at 1.0-2.0 pt/100 gal spray solution. Tank mix with GLYPHOSATE for enhanced morningglory and ALS- and glyphosate-resistant Palmer amaranth control in RR-soybean. Do not apply to weeds and crop that are under stress. MOA=14 |
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2,4-DB 2S
Butyrac 200 2S (2,4-DB) |
0.7-0.9 pt |
0.18-0.23 lb |
Apply to soybeans approximately 7-10 days before bloom up to mid-bloom (soybeans are about knee high). Broadcast applications outside of this time period could result in yield reduction. Controls common cocklebur, annual morningglory, and pigweed (less than 3"). Several tank mix partner options available, consult label. Do not harvest soybeans within 60 days application. MOA=4 |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Post-Directed Herbicides for Weed Management in Soybean |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Aim 2EC (carfentrazone)
Aim 1.9EW |
0.5-1.5 oz
|
0.008-0.023 lb
|
Apply as a directed spray toward the base of the plant to avoid contact with the soybean foliage. The use of spray shields will further protect the crop plant from injury. Controls velvetleaf, annual morningglory, and ALS- and glyphosate-resistant Palmer amaranth (up to 4" tall). Add 1 qt of NIS per 100 gallons of spray solution. Do not feed treated soybean forage or hay to livestock. MOA=14 |
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Gramoxone Inteon 2E (paraquat)
paraquat 3S |
1.0-2.0 pt
0.75-1.5 pt
|
0.25-0.50 lb
|
GRAMOXONE is a RESTRICTED USE PESTICIDE.
Minimum soybean height(s):
PARAQUAT (MOA=22) = 8 inches SENCOR (MOA=5) = 8 inches 2,4-DB (MOA=4) = 8 inches.
Apply GRAMOXONE with hooded or shielded sprayer to avoid contact with soybean foliage. Apply 2,4-DB as a directed spray where contact only occurs on the bottom third of the soybean plant. Do not allow spray to contact growing points on the plant. Do not apply more than 2 applications of 2,4-DB in a growing season. Spray to cover weeds no more than 3 to 4 in. tall. Where rate range is given, use lower rate when weeds are no taller than 2 in. and higher rate for weeds up to 4 in. tall. If necessary, a second SENCOR post-directed application can be made 7 days after the first. Use a NIS to improve spray coverage of weeds. Do not apply SENCOR within 70 days of harvest. |
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Sencor 75DF (metribuzin)
|
0.33-0.67 lb |
0.25-0.50 lb |
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2,4-DB 2S
Butyrac 200 2S (2,4-DB) |
0.7-1.6 pt |
0.18-0.40 lb |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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Harvest Aids for Soybean |
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Rate/Acre Broadcast |
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Herbicide |
Formulation |
Active Ingredient |
Remarks/Precautions1 |
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Aim 2EC (carfentrazone)
Aim 1.9EW |
1.0-2.0 oz
|
0.016-0.032 lb
|
Apply to soybeans after maturity and grain has begun to dry down. Use a minimum of 10 GPA of final spray volume (5 GPA for aerial applications). Desiccates annual morningglory and other harvest impediments. Coverage is essential for maximum performance. Add a COC (1-2 gal/100 gals), NIS (1 qt/100 gals), or MSO (1-2 gal/100 gals) to the spray solution. MOA=14 |
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Glyphosate acid equivalent (ae)
3 lb ae/gal 4 lb ae/gal 4.17 lb ae/gal 4.5 lb ae/gal |
32-64 oz 24-48 oz 23-46 oz 22-44 oz |
0.75-1.5 lb ae |
Apply to soybeans after pods have set and have lost all green color (minimum of 14 days before harvest). In RR-soybeans, the maximum use rate for a preharvest application is 0.75 lb ae/A. In conventional soybeans, maximum use rate for preharvest application is 4.8 lb ae/A. Labels vary on this restriction, consult label of the glyphosate product for more details. Preharvest applications are not recommended for soybeans grown for seed as a reduction in vigor or germination may occur. MOA=9 |
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|
Gramoxone Inteon 2E (paraquat)
paraquat 3S |
0.5-1.0 pt
5.4-10.7 oz
|
0.125-0.25 lb |
GRAMOXONE is a RESTRICTED USE PESTICIDE. Apply to soybeans after full pod development, ½ of the leaves have dropped, and the remaining leaves are yellowing. Do not apply within 15 days of harvest. For better desiccation of larger weeds, use the higher rate. Add non-ionic surfactant at 1 qt per 100 gal of spray solution. MOA=22 |
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Sodium Chlorate 3S
|
2.0 gal |
6.0 lb |
Apply 7-10 days before anticipated harvest to desiccate soybeans and weeds. Apply in a minimum of 20 GPA for ground (5 GPA for air) applications. Weather conditions that favor defoliation include high temperatures, high humidity, low wind velocity, and adequate soil moisture. Apply with a NIS at 2-4 pt or COC at 1-2 qt per 100 gal of spray solution. Do not graze treated fields or feed treated foliage. MOA=not classified (NC) |
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1Mode of Action (MOA) identifies the site of action(s) of that particular product. This aids in rotating herbicide products to avoid resistance problems. |
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For more information download the South Carolina Soybean Production Guide
Page maintained by: Pawel Wiatrak, pwiatra@clemson.edu