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POST. Apply postemerge until corn reaches 11 inches. Do not use fluid fertilizer carrier. Use with tank-mix partner that controls emerged weeds.
Primarily intended for EPOST applications in soybeans, but a supplemental label is available for applications in corn. Rates are 1.5-3 qt/A depending on soil texture and organic matter (O.M.). For soils with less than 3% O.M., apply 1.5-2 qt/A on coarse soil or 1.5-2.75 qt/A on medium or fine texture soil. May be applied from corn emergence until the corn is 30 inches tall. Do not use on sweet corn. Do not use liquid fertilizer as the carrier.
HARNESS or DEGREE (1.2-2.6 lb ai/A) ($15.70-40.55) Rates are 1.25-2.75 pt acetochlor 7L for conventional till or 1.5-3 pt per acre for reduced till. Rates for most situations are 2.2-2.7 pt per acre; use the higher rate for reduced till. The higher rates are most consistent. Degree 3.8L rates are 2.25-5 pt for conventional till or 2.75-5.5 pt per acre for reduced till. Rates for most situations are 3.25-4.25 pt per acre. Harness at 2 pt provides the equivalent acetochlor as 3.67 pt Degree.
TOPNOTCH 3.2L (1.6-2.4 lb ai/A) Rates are 2-3 qt TopNotch 3.2L, which is greater than many other acetochlor products because Topnotch is less concentrated.
Follow precautions as described for other acetochlor products. Several tank-mix partners available.
Tank-mixes for most situations are listed below. Labeling may include preemergence mixes with Prowl and Python and postemerge mixes with Hornet, Accent, and Permit or burndown mixes with Gramoxone, 2,4-D, and Roundup. Refer to label for specific tankmix instructions.
HARNESS or DEGREE + ATRAZINE EPP, PPI, PRE, EPOST. Mix 1.25-2 qt/A atrazine. Add 1-2.25 pt/A Harness in conventional till or 1.75-2.5 qt/A Harness in reduced till. Tank-mix 2.25-4.25 pt Degree in conventional till or 3.25-4.5 pt Degree in reduced till. Weeds must be small for post timing.
HARNESS or DEGREE + DICAMBA PRODUCT or MARKSMAN PRE or EPOST. Tank-mix 1.25-2.75 pt Harness or 2.25-5 pt Degree + 1 pt dicamba 4L or 3.5 pt Marksman per acre. Not for coarse soils. Grass must be small for postemerge. Rain required for preemerge activity. Refer to dicamba or Marksman section for post rates.
HARNESS or DEGREE + BALANCE PRE. Tank-mix 1.25-2.25 pt Harness or 2.25-4.25 pt Degree with 1-3.5 oz Balance Pro per acre. Refer to soil precautions in section for Balance alone.
HARNESS or DEGREE + CALLISTO EPOST. Tank-mix with 3 oz/A Callisto for postemergence broadleaf weed control. Weeds must be less than 5 inches tall. Add nitrogen (2.5% v/v 28% N or 8.5 lb/100 gal AMS). Adding 0.25% v/v NIS may improve control of emerged weeds. Do not add MSO.
EPP, PPI, PRE, or EPOST. Use 1.8-2.3 qt/A Harness Xtra premix containing 4.3 lb acetochlor (Harness) + 1.7 lb atrazine per gallon.
Use 2.9-3.7 qt/A Degree Xtra containing 2.7 lb acetochlor + 1.3 lb atrazine per gallon. Use 2.2-3.4 qt/A Breakfree ATZ or Keystone 10 www.iGrow.org containing 3.0 lb acetochlor (Surpass) + 2.25 lb atrazine per gallon. Use 2.5-5 qt/A FulTime containing 2.4 lb acetochlor + 1.6 lb atrazine per gallon. Rates vary by soil texture, O.M. and time of application. Weeds must be small for post timing, preemergence preferred.
SURPASS, TOPNOTCH, BREAKFREE, OVERTIME, or VOLLEY (1.2-3 lb ai/A) ($12.10-51.65) Surpass, Breakfree, or Volley rates are 1.5-3.75 pt for conventional till or 2-3.75 pt per acre for reduced till. Rates for most situations are 2.5-3 pt per acre; use the higher rate for reduced till. The higher rates are most consistent. TopNotch rates are 2-3 qt per acre.
Tank-mixes for most situations are listed below. Labeling may include postemergence mixes with Accent, dicamba, 2,4-D, glyphosate products, Ignite (LL corn), Lightning (CF corn), Resource, Steadfast, and other products labeled for postemergence application.
SURPASS, VOLLEY, TOPNOTCH, or BREAKFREE + ATRAZINE EPP, PPI, PRE, EPOST. Tank-mix 0.5-2 qt/A atrazine. Weeds must be small for early post timing.
SURPASS, TOPNOTCH, BREAKFREE + HORNET WDGPRE. Add 4-5 oz Hornet WDG per acre. Use 5 oz rate for fine-textured soils with 3% O.M. Do not use on coarse-textured soils with 1.5% O.M.
EPOST. Add 2-3 oz Hornet WDG for postemergence control of velvetleaf, sunflower, cocklebur, marestail, annual smartweed, and others. Add 0.25% v/v NIS or 1% v/v COC.
SURPASS, VOLLEY, TOPNOTCH, or BREAKFREE + DICAMBA PRODUCT or MARKSMANPRE or EPOST. Add 0.5-1 pt/A dicamba 4L or 2-3.5 pt/A Marksman. Not for coarse-textured soils with 2% OM. Adjust dicamba or Marksman rates according to weed situation for postemergence applications.
SURPASS, VOLLEY, TOPNOTCH, or BREAKFREE + BALANCE FLEXXPRE. Refer to the Balance Flexx label for proper use rates for your location and soils.
PRE, EPOST. Premixes containing 4 lb acetochlor (Surpass) + 1.5 lb atrazine per gallon. Rate is 1.6-3 qt per acre. The 2 qt rate provides 2 lb acetochlor + 0.75 lb ai atrazine per acre. Rates vary with soil texture, O.M., and time of application.
EPPS, PPI, PRE, EPOST. Rate is 1.5-2 pt/A depending on soil texture and O.M. Supplemental label allows rates up to 3 pt/A if longer residual control is desired. Standard rates are intended for limited residual control that will be followed by a postemergence herbicide application. May be applied 30 days prior to planting up to corn 11 inches tall, but it is recommended to apply just prior to weed germination. May be applied in the fall to soybean stubble after October 15 as defined for acetochlor.
Provides control or suppression of several annual grass and broadleaf weed species. SureStart contains 3.75 lb acetochlor + 0.12 lb flumetsulam + 0.29 lb clopyralid per gallon. SureStart at 1.5-2 pt/A is equivalent to 0.9-1.2 pt/A Surpass + 0.45-0.6 oz wt/A Python + 0.15-0.2 pt/A Stinger.
Do not apply preemergence to soils with a pH 7.8. Do not apply postemergence if the field was previously treated with Counter or Thimet insecticide. Where the water table is less than 30 feet below the soil surface, do not apply within 150 feet of a well if the soil is a sand with less than 3% organic matter (OM), loamy sand with less than 2% OM, or sandy loam with less than 1% OM. Do not mix or load within 50 feet of a well unless it is done on a properly constructed impervious pad.
Chloroacetamide herbicide. Very good to excellent control of several annual grasses. Sandbur and wild proso mllet are partially controlled. Fair to good control of certain annual broadleaves such as pigweed, waterhemp, or black nightshade. Crop tolerance is adequate.
FALL. Apply after October 1 when soil temperature at 4 inches is less than 55o F. Use 21 oz per acre for medium- and fine-textured soil with 2.5% O.M.
EPPS. For reduced or no-till systems. Apply up to 45 days before planting. A split application (2/3 early and 1/3 at planting) is preferred if applying more than 30 days before planting. Burndown herbicide may be added for emerged weeds.
SPPI. Apply within 2 weeks of planting and incorporate into the top 1-2 inches. Avoid deep incorporation. Better results than with preemergence if rain is very limited.
PRE. Requires rain prior to weed emergence. Use a rotary hoe or harrow if weeds emerge before it rains.
POST. May be applied early postemergence on corn up to 12 inches. Emerged weeds are not controlled. Preemergence preferred.
EPPS, PPI, PRE, and POST. Use 2-3.5 pt G-Max Lite premix containing 2.25 lb dimethenamid-p (Outlook) + 2.75 lb atrazine per gallon. Preemergence preferred. COC may be added to early post timing. The 3 qt rate provides the equivalent of 18 oz Outlook plus 1 lb atrazine per acre.
Labeling also lists tank-mixes or sequential applications with Accent, Balance, Basagran, Beacon, Callisto, Dual, Ignite (LL corn), Lightning or Pursuit (CF corn), NorthStar, Option, Steadfast, and 2,4-D. Glyphosate product, or Gramoxone may be added for burndown. Refer to label restrictions or the section for each herbicide and follow the most restrictive label.
BALANCE FLEXX (isoxaflutole) Site of Action: 27
Balance Flexx is a soil-applied herbicide with root and shoot uptake. Isoxaflutole is an HPPD-inhibiting herbicide that can inhibit pigment functions causing leaves to turn white. Contains the safener cyprosulfamide that allows early postemergene applications.
Controls annual broadleaf weed species such as pigweed, waterhemp, velvetleaf, lambsquarters, kochia, common ragweed, black nightshade, and others. May also control some annual grass weed species, such as green foxtail, barnyardgrass, and field sandbur.
May only suppress yellow foxtail and wild buckwheat. Rainfall is required for incorporation and uptake.
Rates vary from 3-6 fl oz/A depending on application timing, soil organic matter, and soil texture. For coarse textured soils, apply 3 oz/A if organic matter is less than 1.5% or 4 oz/A if O.M. is greater than 1.5%. For medium textured soils, apply 5 oz/A if O.M. is less than 1.5% or 6 oz/A if O.M. is greater than 1.5%. For fine textured soils, apply 6 oz/A. Minimum carrier rate is 10 gpa. The potential for corn injury increases in soils with low O.M., coarse texture, or high soil pH.
If the water table is less than 25 feet below the soil surface, do not apply to sandy, sandy loam, or loamy sand soils or subsoils where the average organic matter in the upper 12 inches is less than 2% by weight. Plant corn at least 1.5 inches deep and make sure the seed is adequately covered. Do not exceed 6 oz/A per year. Off-site movement may occur if applied in areas that receive less than 15 inches annual precipitation. Do not apply using aerial equipment. Do not mix or load within 50 feet of wells, sink holes, streams, rivers, lakes, or reservoirs.
Rotation interval is 4 months for wheat; 6 months for soybeans; sweet corn, barley, grain sorghum, and sunflower; 10 months for alfalfa (with 15 inches annual precipitation); and 18 months for dry beans (with 15 inches annual precipitation).
BURNDOWN. If weeds have emerged at time of application prior to corn emergence, mixing a COC or MSO may aid in foliar activity of weeds less than 3 inches tall (use NIS rather than MSO or COC when tank mixing with certain glyphosate formulations (non-loaded) or mixing with liquid nitrogen). Tank mix an additional herbicide, such as Gramoxone, glyphosate, or 2,4-D if weeds are greater than 3 inches tall or weed species are present that may not be controlled by Balance Flexx. Tank mixing atrazine may improve control of emerged giant ragweed, common cocklebur, or Pennsylvania smartweed.
PPS. Apply up to 21 days prior to planting or up to 30 days prior to planting if a postemergence herbicide application is also planned.
If splitting the application, apply 60% of the rate 15-30 days prior to planting and the remaining 40% at planting.
12 www.iGrow.org PPI. Apply up to 21 days prior to planting or up to 30 days prior to planting if a postemergence herbicide application is also planned.
Incorporate less than 2 inches below the soil surface.
PRE. Apply after planting but prior to crop emergence. Failure to properly close the seed furrow could result in crop injury.
EPOST. Apply from corn spiking to the V2 growth stage (2 leaf collars). May tank mix with atrazine but not other herbicides for EPOST applications. May not provide control of weeds larger than the 1 true leaf growth stage. Do not use liquid fertilizers or COC or MSO when applying to emerged corn. Do not harvest corn forage until 45 days after application.
Balance may be tank-mixed with herbicides to improve burndown or mixed with other preemergence herbicides, including atrazine, Dual, Harness, Micro-Tech, Prowl, Surpass, TopNotch, Degree, Define, Outlook, Bicep, Harness Xtra, Lariat, Bullet, Degree Extra, and Guardsman. Rate of the tank-mix partner is frequently reduced 50% from full rate.
CORVUS (isoxaflutole + thiencarbazone) Site of Action: 27 + 2 Apply 3.3-5.6 fl oz/A, which is equivalent to Balance Flexx at 3.3-5.6 oz/A (3.3 oz for coarse soils with less than 2% O.M.).
The addition of thiencarbazone may increase grass control relative to Balance Flexx. Controls many common annual grass and broadleaf weed species. Add atrazine to control wild buckwheat and increase broadleaf weed control. Laudis may be applied post-emergence if Corvus is applied pre-emergence, but it is best to diversify herbicides to prevent selection for resistance and carryover.
Minimum carrier rate is 10 gpa for ground applications. Do not apply with aerial equipment. Rotation restriction is 4 months for wheat; 9 months for soybeans, sweet corn, popcorn, and barley; and 17 months for alfalfa, dry beans, oats, sorghum, sunflower, canola, surgar beets, and others. Intervals may be much longer on soils with a pH greater than 7.5.
Do not apply in areas where the water table is less than 25 feet deep, soil texture is coarse (sandly loam, loamy sand, or sand), subsoil texture is loamy sand or sand, and the O.M. in upper 12 inches is less than 2%. Do not apply more than 5.6 fl oz in a growing season.
PPS, PPI: Apply up to 21 days prior to corn planting or 30 days if planning additional herbicide applications. Do not incorporate deeper than 2 inches below the soil surface.
Burndown: To increase foliar activity, add COC or MSO. May use NIS if mixing with a loaded glyphosate product.
PRE: Make sure furrows are closed to prevent seedling injury.
EPOST: May tank mix with atrazine (but not glyphosate) for post-emergence applications up to 2-leaf collar corn. Do not add adjuvants for post-emergence applications. Do not add foliar insecticides.