WEED CONTROL IN FIELD CORN Mike Marshall, Extension Weed Specialist

Transcription

1 WD CONTROL IN FILD CORN Mike Marshall, xtension Weed Specialist Preplant/Burndown s for Weed Management in Field Corn Balance Flexx SC (isoxaflutole) 6.0 fl oz Mode of Action lb 7 ntry 4 days 1 hours Comments: BALANC FLXX is a RSTRICTD US PSTICID. Apply BALANC FLXX up to 30 days before planting corn. Add MSO at 0. gal per 100 gal or COC at 1.0 gal per 100 gal of spray solution for weeds 3 inches or less in height. BALANC FLXX may be tank mixed with PARAQUAT, LYPHOSAT, or,4 D if weeds are greater than 3 inches in height. If the water table (level of saturation) is less than feet below the ground surface, do not use BALANC FLXX on soils where the subsoil is loamy sand or sand (i.e., no clay subsoil). Do not apply more than 6.0 fl oz BALANC FLX per 36 day period. Rainfast interval = N/A (suggest 1 hour). Clarity/Banvel 4 S oz 4 hours (dicamba) lb 4 Comments: Apply any time prior to planting corn. Use 16 oz/a rate on medium to fine texture soils with >.% organic matter. Use 8 oz/a rate on coarse textured soils with less than.% organic matter. Corvus.63 SC (thiencarbazone isoxaflutole) 3.33 fl oz 0.01 lb lb 7 4 days 1 hours Comments: CORVUS is a RSTRICTD US PSTICID. Apply CORVUS up to 30 days before planting corn. Add MSO at 0. gal per 100 gal or COC at 1.0 gal per 100 gal of spray solution for weeds 6 inches or less in height. CORVUS may be tank mixed with PARAQUAT, LYPHOSAT, or,4 D if weeds are greater than 6 inches in height. Do use seed or soil applied CHLORPYRIFOS, TRBUFOS, PHORAT, FONOPHOS, and other organophosphate or carbamate insecticides in the same season as CORVUS. If the water table (level of saturation) is less than feet below the ground surface, do not use CORVUS on soils where the subsoil is loamy sand or sand (i.e., no clay subsoil). Do not apply more than.6 fl oz/a of CORVUS per 36 day period. Rainfast interval = N/A (suggest 1 hour). Direx 4 L qt 1 hours (diuron) lb 7 Comments: Apply any time from fall through spring prior to planting corn. Heavy textured soils will require higher application rate. DIRX 4L may be tank mixed with other burndown herbicides, consult tank mix partner label for more details. Plant corn at least 1. deep and make sure seed slot is closed. Do not apply more than 1.6 qt/a of DIRX 4L per year. T 0.08 C 0..0 oz 1 hours (pyraflufen ethyl) lb 14 Comments: Field corn may be planted any time after T application. For best result, apply T to broadleaf weeds less than 4 inches tall or rosettes less than 3 inches in diameter. round application requires minimum of 10 gallons/a.

2 Preplant/Burndown s for Weed Management in Field Corn (cont.) Fierce 76WD (flumioxazin pyroxasulfone) oz lb lb Mode of Action 14 1 ntry 1 hours Comments: Apply FIRC 7 to 30 days prior to planting field corn. Do not apply more than 4. oz/a of FIRC during a single growing season. Add a COC or methylated seed oil at 1 to pt/a or non ionic surfactant at 0.% v/v. Use only on no till or minimum tillage fields where last year s crop residue has not been incorporated into the soil. Do not use on popcorn, sweet corn, or corn grown for seed. Tank mix partners include LYPHOSAT,,4 D LV, ATRAZIN, BASIS, XPRSS, HORNT, PYTHON, RSOLV, SIMAZIN, DICAMBA, PARAQUAT, or WDMASTR. Spray equipment, including mixing vessels and nurse tanks, must be cleaned each day following a FIRC application. Keystone NXT.6 SC (acetochlor atrazine) qt lb lb 1 60 days 1 hours Comments: KYSTON NXT is a RSTRICTD US PSTICID. Apply KYSTON NXT up to 4 days prior to planting field corn; However, planting should be done as close as possible to the time of application of KYSTON NXT to provide effective weed control during critical early season corn development. For control of emerged weeds at the time of application, tank mix KYSTON NXT with LYPHOSAT, LIBRTY, BANVL, CLARITY,,4 D, or RAMOXON. Do not apply KYSTON NXT (acetochlor) to the following soils within 0ft of any well where depth to ground water is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than % organic matter; or sandy loams with less than 1% organic matter. Do not apply more than 3.8 qt per of KYSTON NXT per season. Liberty 80 SL 9 36 oz 70 days 1 hours (glufosinate) lb 10 Interline.34SL Comments: Thorough spray coverage is essential for optimum performance. round application requires a minimum of 1 gallons of water/acre. Dense weed canopies require 0 to 40 gallons per acre. See label for further application instructions and tank mix partners. lyphosate acid equivalent (ae) 9 4 hours 3 lb ae/gal 4.17 lb ae/gal 4. lb ae/gal 3 47 oz 3 4 oz 3 oz lb ae Comments: Apply in 10 0 gal of water to 4 weeks prior to your anticipated planting date to control existing groundcover. In most fields, a follow up application of PARAQUAT will be needed at planting. Consult product label to determine if a surfactant is needed.,4 D LV pt 48 hours (various) lb 4 Comments: Apply 7 to 14 days prior to planting field corn. Do not use on a light, sandy soil, or where soil moisture is limiting weed growth. Very effective for cutleaf evening primrose control. Can be tank mixed with other burndown herbicides (see label). 3

3 Preplant/Burndown s for Weed Management in Field Corn (cont.) ramoxone SL (paraquat) Firestorm 3 S Parazone 3 S pt pt Mode of Action lb ntry 1 hours Comments: RAMOXON is a RSTRICTD US PSTICID. Apply at planting as a follow up to an earlier application of LYPHOSAT. Provides better control of chickweed, henbit, purple deadnettle, and cutleaf eveningprimrose than LYPHOSAT. Add NIS at 1 qt per 100 gal of spray solution. Rainfast interval = 30 minutes. Hornet 68. WD (flumetsulam clopyralid) Stanza 68. WD oz lb lb 4 8 days 48 hours 14 Comments: Apply HORNT up to 30 days before planting corn. If weeds are present at time of application, tank mix HORNT with PARAQUAT, LYPHOSAT, or,4 D. Add COC or NIS at qt per 100 gal of spray solution. Rainfast interval = hours. Leadoff 33.4 DF 1..7 oz 4 hours (rimsulfuron thifensufluron) lb lb Comments: Apply LADOFF any time after harvest until right before planting corn. LADOFF tank mix partners may include LYPHOSAT, PARAQUAT,,4 D LV, DICAMBA, or LUFOSINAT. No additional surfactant is needed if tank mixed with LYPHOSAT or LIBRTY with a built in adjuvant system. Otherwise, add NIS at 1 qt per 100 gal or COC at 1 gal per 100 gal or MSO at 0. gal per 100 gal of spray solution plus an ammonium nitrogen fertilizer (AMS at lb/a or UAN at qt/a). Do not apply postemergence to corn. Resicore 3.9SC (acetochlor mesotrione clopyralid).. qt lb lb lb hours Comments: Apply RSICOR up to 8 days before planting corn. RSICOR should be tank mixed with LYPHOSAT, PARAQUAT, LUFOSINAT, and/or,4 D for control of existing emerged weeds at the time of application. Do not apply more than 3. qt of RSICOR per acre per year. Do not make more than two applications of RSICOR per year. Do not apply RSICOR (acetochlor) to the following soils within 0ft of any well where depth to ground water is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than % organic matter; or sandy loams with less than 1% organic matter. 4

4 Preplant/Burndown s for Weed Management in Field Corn (cont.) Sharpen.8SC (saflufenacil) fl oz Mode of Action lb 14 ntry 80 days 1 hours Comments: Apply SHARPN 14 to 30 days before planting corn. For optimum SHARPN burndown activity, add MSO at 1 gal per 100 gal of spray solution plus ammonium nitrogen fertilizer (UAN at 1.. gals per 100 gal or AMS at lbs/100 gals). SHARPN may be tank mixed with LYPHOSAT, CLARITY, ATRAZIN, STATUS, HARNSS, HARNSS XTRA, VRDICT, PROWL HO, OUTLOOK, UARDSMAN MAX, and UARDSMAN MAX LIT. Do not apply SHARPN after corn emergence or severe crop injury will occur. Do not apply more than 6.0 fl oz (0.134 lb ai/a) of SHARPN per cropping season. Do not apply SHARPN where an at planting application of an organophoshate or carbamate insecticide is planned or has occurred or severe crop injury may occur. However, SHARPN may be applied when AZTC or FORTRSS insecticides if applied at planting as a BAND, T BAND, or IN FURROW. SHARPN may be applied with all other classes of at planting insecticides including pyrethroids, neonictinoids, and fipronil. Rainfast interval = 1 hour. SureStart II 4. (acetochlor flumetsulam clopyralid) pt lb lb lb days 1 hours Comments: Apply SURSTART II up to 14 days before planting corn. For enhanced control of emerged weeds at the time of burndown application, SURSTART II may be tank mixed with LYPHOSAT,,4 D, LIBRTY, or RAMOXON. Do not apply SURSTART II (acetochlor) to the following soils within 0ft of any well where depth to ground water is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than % organic matter; or sandy loams with less than 1% organic matter. Do not apply more than 3 pt/a of SURSTART II in a single application. Valor SX 1 WD oz 1 hours (flumioxazin) lb 14 Comments: Apply 14 to 30 days prior to planting field corn. Do not apply more than 3 oz/a of VALOR SX during a single growing season. Do not irrigate when corn is emerging to the leaf stage. Do not use on popcorn, sweet corn, or corn grown for seed. Can be tank mixed with other burndown herbicides (see label). Verdict.7C (saflufencil dimethenamid p) 10 1 fl oz lb lb days 1 hours Comments: Apply VRDICT 14 to 30 days before planting corn. For optimum VRDICT burndown activity, add MSO at 1 gal per 100 gal of spray solution plus ammonium nitrogen fertilizer (UAN at 1.. gals per 100 gal or AMS at lbs/100 gals). VRDICT may be tank mixed with LYPHOSAT, CLARITY, ATRAZIN, STATUS, and SHARPN. Do not apply VRDICT after corn emergence or severe crop injury will occur. Do not apply more than lb ai/a saflufenacil from all product sources per cropping season. Do not apply more than fl oz of VRDICT per cropping season. Do not apply VRDICT where an at planting application of an organophoshate or carbamate insecticide is planned or has occurred or severe crop injury may occur. However, VRDICT may be applied when AZTC.1% granular, AZTC 4.67 granular, or FORTRSS granular insecticides is applied at planting as a BAND, T BAND, or IN FURROW. VRDICT may be applied with all other classes of at planting insecticides including pyrethroids, neonictinoids, and fipronil.

5 Preplant/Burndown s for Weed Management in Field Corn (cont.) Zidua 0.8W (pyroxasulfone) oz Mode of Action lb 1 ntry 1 hours Comments: Apply ZIDUA 1 to 4 days before planting corn. ZIDUA tank mix partners include ATRAZIN, LYPHOSAT, LIHTNIN, OUTLOOK, PROWL HO, SHARPN, and STATUS. On coarse textured soils, do not apply more than.7 oz/a of ZIDUA (0.14 lb ai/a of pyroxasulfone) per cropping season. On all other soil types, do not apply more than.0 oz/a of ZIDUA (0.66 lb ai/a of pyroxasulfone) per cropping season. 6

6 Weed and Cover Crop Response to Burndown/Preplant s in Conservation Tillage Field Corn 1 T lyphosate lyphosate,4 D lyphosate Atrazine lyphosate Clarity lyphosate Direx lyphosate Leadoff lyphosate Sharpen lyphosate Valor SX ramoxone ramoxone,4 D ramoxone Clarity ramoxone Valor SX ramoxone Direx Liberty barley, little F bluegrass, annual F F F P buttercups chickweed, common F clovers P PF F F F F F F cudweed F F F F F dandelion P P N P F dock, curly P PF F F F F F P F eveningprimrose, cutleaf PF F F geranium, Carolina F henbit/deadnettle F horseweed (marestail) F mustard, wild F F pansy, field F F F F peanut, volunteer F F F F F P F P F F F pepperweed, Virginia radish, wild F ryegrass, Italian F F F F F F F F P sorrel, red F PF spurry, corn F swinecress F F PF F F PF F vetch F F wheat/rye cover crop P F F F F 1Key to Response Ratings: = excellent control, 90% or better; = good control, 80 to 90%; F = fair control 70 to 80%; P = poor control, less than 70%; = Insufficient Data. rates for burndown are Atrazine at 1.0 lb/a; T at 1.0 oz/a; lyphosate at 0.7 lb ae/a ( oz/a of 4. lb ae/gal or 3 oz/a of 3.0 lb ai/gal);,4 D at 1 pt/a; Clarity at 8 oz/a; Direx at 1.6 pt/a; Leadoff at 1. oz/a; Sharpen at 1.0 oz/a; ramoxone at 3.0 pt/a; Valor SX at.0 oz/a; and Liberty at 9 oz/a. 7

7 Weed Response to Soil Applied Preemergence s for Corn Weed Management 1 Acuron Anthem Anthem ATZ Atrazine (ATZ) Acetochlor AcetochlorATZ Alachlor AlachlorATZ Balance Flexx Corvus Dimethenamid p Hornet anoda, spurred barnyardgrass F P beggarweed, Florida F P P F bermudagrass P P P P P P P P P P P P citronmelon P P P cocklebur, common P P P F F P crabgrass P cowpea P P P P crotalaria, showy P P P P croton, tropic P P P P P crowfootgrass P dayflower, Benghal F F eclipta goosegrass P jimsonweed P P P johnsongrass, seedling P P P P P P P johnsongrass, rhizome P P P P P P P P P P P P lambsquarters, common F F F morningglory, annual P P P F F P F nutsedge, purple P P P P P P P P P P P P nutsedge, yellow F P P P F F F F P P F P panicum, fall P P panicum, Texas F F F P PF P PF PF F F PF P pigweed ALS resistant DNA resistant poinsettia, wild P P P purslane, common pusley, Florida ragweed, common P P P ryegrass, annual P sandbur, field P F F F F F F F P senna, coffee F F P F P F P sesbania, hemp F F P F P F P sicklepod F P P P F sida, prickly P P F signalgrass, broadleaf F F P F F P smartweed, Pennsylvania P P P P spurge starbur, bristly PF P P velvetleaf P P P P vol. RR soybean P P P P vol. peanut P P P P 1Key to Response Ratings: = excellent control, 90% or better; = good control, 80 to 90%; F = fair control, 70 to 80%; P = poor control, less than 70%; = Insufficient Data. 8

8 Weed Response to Soil Applied Preemergence s for Corn Weed Management(cont) 1 Instigate Lumax/Lexar S Metolachlor S MetolachlorATZ Princep Prowl Python Resolve Sharpen SureStart II Verdict Zidua anoda, spurred barnyardgrass P P beggarweed, Florida F F bermudagrass P P P P P P P P P P P P citronmelon P F cocklebur, common P P P crabgrass P P cowpea P P P crotalaria, showy P P P croton, tropic P P P P crowfootgrass P P dayflower, Benghal F eclipta goosegrass P F P jimsonweed P P johnsongrass, seedling F F F P P F P P P johnsongrass, rhizome P P P P P P P P P P P P lambsquarters, common morningglory, annual F P P F F F P nutsedge, purple P P P P P P P P P P P P nutsedge, yellow P F F F P P P P P P F P panicum, fall F P P panicum, Texas PF PF P P PF P F P PF PF F pigweed ALS resistant DNA resistant poinsettia, wild P P purslane, common pusley, Florida F F ragweed, common PF P F ryegrass, annual F P F P sandbur, field F F F P senna, coffee P F P F F sesbania, hemp P F P F F sicklepod P P F F F sida, prickly F P P F F signalgrass, broadleaf F F F F P P F P F F F smartweed, Pennsylvania P P P P spurge starbur, bristly P P P P velvetleaf P P F P vol. RR soybean P P P P P vol. peanut F P P P P P 1Key to Response Ratings: = excellent control, 90% or better; = good control, 80 to 90%; F = fair control, 70 to 80%; P = poor control, less than 70%; = Insufficient Data. F F P P F P F 9

9 Important round and Surface Water Considerations Regarding the Use of Atrazine and Simazine Containing Products. ATRAZIN and SIMAZIN users are strongly encouraged to follow label guidelines, discussed below, to share in the responsibility of preserving the future use of ATRAZIN and SIMAZIN. These restrictions apply to all formulations of ATRAZIN and SIMAZIN, and all pre mix package products that contain ATRAZIN and SIMAZIN. Application Rate Restrictions: For soils that are not defined as highly erodible, the maximum use rate for ATRAZIN is.0 lb ai (active ingredient) per acre and for SIMAZIN is.0 lb ai per acre per season. For soils classified as highly erodible (as defined by NRCS), If conservation tillage is practiced with at least 30 percent crop residue coverage at planting, the maximum use rate is.0 lb ai per acre for ATRAZIN and SIMAZIN. If crop residue coverage is less than 30 percent, then the maximum rate for ATRAZIN and SIMAZIN is 1.6 lb ai per acre. If ATRAZIN was not applied prior to corn emergence, then the total amount applied should not exceed.0 lb ai per acre. If ATRAZIN was applied to a field preemergence, then the total amount of ATRAZIN should not exceed. lb ai per acre per calendar year. The total amount of SIMAZIN should not exceed.0 lb ai per acre per calendar year. Setbacks: Operations that involve mixing, loading, rinsing, or washing ATRAZIN or SIMAZIN within 0 feet of wells (including abandoned wells, drainage wells, or sink holes), rivers, intermittent streams, lakes, or reservoirs is prohibited. This restriction does not apply to operations within a properly designed impervious pads and diked mixing/loading areas. ATRAZIN or SIMAZIN must not be applied aerially or by ground equipment within 66 feet of points where field surface water enters perennial or intermittent streams and rivers or within 00 feet around natural or impounded lakes and reservoirs. If ATRAZIN or SIMAZIN is applied to highly erodible land, the 66 foot buffer or setback from runoff entry points must be planted to crop, seeded with grass, or other suitable crop. If ATRAZIN or SIMAZIN is applied to tile terraced fields containing standpipes, then users are advised to follow one the following restrictions: 1) do not apply ATRAZIN or SIMAZIN within 66 feet of standpipes; ) After applying ATRAZIN or SIMAZIN to the entire field, immediately incorporate it to a depth of 3 inches; or 3) Apply ATRAZIN or SIMAZIN to the entire field under conservation tillage practices where high crop residue levels are present. xamples of Products that Contain Atrazine or Simazine Trade Name (s) Trade Name (s) Aatrex atrazine Harness Xtra acetochlor atrazine Bicep II Magnum atrazine s metolachlor uardsman dimethenamid p atrazine MAX Bicep Lite II atrazine s metolachlor Keystone acetochlor atrazine Magnum Bullet alachlor atrazine Lariat alachlor atrazine Cinch ATZ s metolachlor atrazine Lumax s metolachlor atrazine mestrione Degree Xtra acetochlor atrazine Marksman dicamba atrazine xpert glyphosate s metolachlor Princep simazine atrazine Fultime acetochlor atrazine Steadfast ATZ nicosulfuron rimsulfuron atrazine 30

10 lyphosate Resistant Palmer Amaranth Programs Field Corn Palmer amaranth populations have been documented in South Carolina to be resistant to acetolactate synthase (ALS) inhibiting herbicides (i.e., Accent, Resolve, Steadfast, and Option) and dinitroaniline (yellow) herbicides (i.e., Prowl), and glyphosate (i.e., Roundup, Touchdown). The following table is designed to aid producers in managing and/or preventing herbicide resistant Palmer amaranth populations in corn. Seed Program Conventional Hybrids Liberty Link Hybrids Roundup Ready Hybrids Program PR 1 POST POST DIRCTD 3 atrazine, Harness, Bicep II Magnum, Cinch ATZ, uardsman, Lexar, Corvus, Verdict, Sharpen, Bullet, Breakree, Balance Flexx, Acuron No PR applied atrazine, Harness, Bicep II Magnum, Cinch ATZ, uardsman, Lexar, Corvus, Verdict, Sharpen, Bullet, Breakree, Balance Flexx No PR applied atrazine, Harness, Bicep II Magnum, Cinch ATZ, uardsman, Lexar, Corvus, Verdict, Sharpen, Bullet, Breakree, Balance Flexx No PR applied dicamba, Status,,4 D, Impact, Laudis, Callisto, Capreno, atrazine, Armezon, Balance Flexx, Acuron dicamba, Laudis, Callisto, Impact Corvus, Capreno, Balance Flexx, Marksman, Buctril atrazine Liberty Banvel or Clarity, Liberty dicamba Liberty,4 D Liberty Armezon Liberty Warrant Liberty atrazine Callisto Liberty dicamba Liberty atrazine Laudis Liberty atrazine Impact Liberty atrazine Warrant glyphosate atrazine glyphosate dicamba glyphosate,4 D glyphosate Armezon glyphosate Warrant Halex T glyphosate s metolachlor atrazine glyphosate atrazine Laudis glyphosate s metolachlor Callisto glyphosate atrazine Impact glyphosate atrazine Warrant Halex T,4 D, vik, Lorox, Status, Clarity,4 D, vik, Lorox, Status, Clarity,4 D, vik, Lorox, Status, Clarity 1 PR = Preemergence. Apply to soil surface after all tillage and planting has occurred. POST = Postemergence. Consult individual product labels for corn height restrictions, e.g., atrazine applied POST limited to corn 1 inches tall or less. 3 Consult individual product label regarding specific corn height restrictions. 31

11 Preemergence s for Weed Management in Field Corn Acuron 3.44 SC (s metolachlor atrazine mesotrione bicyclopyrone). qt 1.34 lb 0.6 lb 0.1 lb lb Mode of Action ntry 60 days 4 hours Comments: ACURON is a RSTRICTD US PSTICID. Provides good to excellent control of most grass and broadleaf weeds. Tank mix partners include ATRAZIN, PRINCP, LYPHOSAT, and WARRIOR. Aatrex 4 SC qt 60 days 1 hours (atrazine) lb Comments: ATRAZIN is a RSTRICTD US PSTICID. Use to control mostly broadleaf weeds and a few grasses. Tank mix with ACTOCHLOR, S MTOLACHLOR, ALACHLOR, or DIMTHNAMID P for improved grass control. Acetochlor 1 10 days 1 hours (Breakfree 6.4 C Harness 7 Harness 0 Surpass 6.4 C Surpass NXT 7C TopNotch 3. M Degree 3.8 M) 1.. pt pt lb 1.. pt 1.. pt qt. 4. pt 1..0 lb lb 1..0 lb 1..0 lb lb lb lb Comments: HARNSS is a RSTRICTD US PSTICID. Controls most annual grasses (except Texas panicum) and small seeded broadleaf weeds. ACTOCHLOR can be tank mixed with ATRAZIN for improved broadleaf weed control. Do not apply ACTOCHLOR to the following soils within 10ft (0ft for SURPASS/NXT) of any well where depth to ground water is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than % organic matter; or sandy loams with less than 1% organic matter. Do not apply more than 3 lb ai ACTOCHLOR per acre per year. Alachlor.0.7 lb 1 None 1 hours (Micro Tech 4 M).0.7 qt Comments: MICRO TCH is a RSTRICTD US PSTICID. Controls small seeded annual grasses (except Texas panicum) and broadleaf weeds. Anthem.1C (pyroxasulfone fluthiacet methyl) fl oz lb lb days 1 hours Comments: Provides small seeded grass and broadleaf weed control. Application rate is based on soil texture: coarse textured fl oz/a; medium textured fl oz/a. Tank mix with ATRAZIN, BALANC, or HORNT for control of additional weed species. 3

12 Preemergence s for Weed Management in Field Corn (cont) Anthem ATZ 4.0 SC (atrazine pyroxasulfone fluthiacet methyl) 1.7. pt Active Ingredient lb lb lb Mode of Action 1 14 ntry 60 days 1 hours Comments: ANTHM ATZ is a RSTRICTD US PSTICID. Application rate is based on soil texture: coarse textured 1.7 pt/a; medium textured.0. pt/a. Provides small seeded grass and broadleaf weed control. Tank mix with ATRAZIN, BALANC, or HORNT for control of additional weed species. Balance Flexx SC (isoxaflutole) atrazine 4 SC 6.0 fl oz 1. qt lb 1. lb 7 4 days 1 hours Comments: BALANC FLXX is a RSTRICTD US PSTICID. Apply BALANC FLXX during planting (behind the planter after furrow closure) or after planting, but before weeds emerge. Failure to thoroughly close and firm the seed furrow may allow herbicide to directly contact seed which can cause injury. Controls glyphosate and ALS resistant Palmer amaranth. Add 1. lb/a ATRAZIN to enhance residual control of weeds. If the water table (level of saturation) is less than feet below the ground surface, do not use BALANC FLXX on soils where the subsoil is loamy sand or sand (i.e., no clay subsoil). Bicep II Magnum. SC (s metolachlor atrazine) qt lb lb 1 60 days 4 hours Comments: BICP II MANUM is a RSTRICTD US PSTICID. Application use rate is based on soil texture: Sandy soils = qt/a, Medium textured soils = qt/a. Use higher rate for each soil type if applying in a reduced tillage system. Available as a pre mix with glyphosate (XPRT). Breakfree ATZ. SC (acetochlor atrazine)..8 qt lb lb days 1 hours Comments: BRAKFR ATZ is a RSTRICTD US PSTICID. Application use rate is based on soil texture and organic matter content: Sandy soils =..6 qt/a, medium textured soils =.4.8 qt/a. Use higher rate for each soil texture if applying in a reduced tillage system. Do not apply BRAKFR ATZ to the following soils within 10ft of any well where depth to ground water is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than % organic matter; or sandy loams with less than 1% organic matter. Do not apply more than 3 lb ai ACTOCHLOR per acre per year. Do not apply ACTOCHLOR through any irrigation system or using aerial application equipment. 33

13 Preemergence s for Weed Management in Field Corn (cont) Bullet 4 M Lariat 4 C (alachlor atrazine). 3.7 qt lb lb Mode of Action 1 ntry 60 days 1 hours Comments: BULLT and LARIAT are RSTRICTD US PSTICIDS. Application rate is based on soil type and organic matter: Sandy soils =. 3.0 qt/a, medium textured soils = qt/a. Use higher rate for each soil type if applying in a reduced tillage system. Corvus.63 SC (thiencarbazone isoxaflutole) atrazine 4 SC 3.33 fl oz 1.0 qt 0.01 lb lb 1.0 lb 7 4 days 1 hours Comments: CORVUS is a RSTRICTD US PSTICID. Apply CORVUS during planting (behind the planter after furrow closure) or after planting, but before weeds emerge. Failure to thoroughly close and firm the seed furrow row may allow herbicide to directly contact seed which can cause injury. Controls glyphosate and ALS resistant Palmer amaranth, sicklepod, and prickly sida. Add 1.0 lb/a ATRAZIN to enhance residual control of weeds. If the water table (level of saturation) is less than feet below the ground surface, do not use CORVUS on soils where the subsoil is loamy sand or sand (i.e., no clay subsoil). Cinch ATZ. SC (s metolachlor atrazine).6 3. pt lb lb 1 60 days 4 hours Comments: CINCH ATZ is a RSTRICTD US PSTICID. Application rate is based on soil type: Sandy soils =.6 pt/a, medium textured soils = 3. pt/a. Use higher rate for each soil type if applying in a reduced tillage system. Dimethenamid p lb 1 40 days 1 hours (Outlook 6 C) oz Comments: Controls most annual grasses (except Texas panicum) and some broadleaf weeds. DIMTHNAMID P may be tank mixed with ATRAZIN or SIMAZIN. FulTime NXT 4.04 SC qt 60 days 1 hours (acetochlor atrazine) lb lb 1 Comments: FULTIM NXT is a RSTRICTD US PSTICID. The application rate of FULTIM NXT is based on organic matter content of the soil: For soils with less than 1.% organic matter, application rate range is.0.9 qt/a. For soils with 1.% organic matter or more, the application rate range is qt/a. Use only on sorghum seed treated with a safener. Do not apply FULTIM to the following soils within 0ft of any well where depth to ground water is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than % organic matter; or sandy loams with less than 1% organic matter. Do not apply more than 3 lb ai ACTOCHLOR per acre per year. 34

14 Preemergence s for Weed Management in Field Corn (cont) Hornet 68. WD (flumetsulam clopyralid) Stanza 68. WD oz lb lb Mode of Action 4 ntry 8 days 48 hours Comments: Apply HORNT at the time of planting or after planting, but prior to crop or weed emergence. Corn must be planted a minimum of 1. inches deep. Application of HORNT WD or STANZA on soils with less than 1.% organic matter may result in crop injury. Soil applied organophosphate insecticides should be applied in a T band or a band to avoid potential crop injury. Do not apply HORNT WD or STANZA if COUNTR (terbufos) or THIMT (phorate) insecticides were applied previously. Other corn insecticides should be applied in a T band to avoid injury. Do not plant cotton within 18 months of application. Instigate 4.8 WD (rimsulfuron mesotrione) 6.0 oz lb 0.34 lb 7 None 1 hours Comments: Apply INSTIAT after corn planting but before crop emergence. Seed furrow must be firmly closed so that INSTIAT spray does not contact the seed. Do not apply more than 0.06 lb ai of RIMSULFURON (i.e., from LADOFF, PRQUL, RALM Q, or STADFAST Q) during the crop year. Do not apply COUNTR (terbufos) within 60 days of a preemergence or preplant application of INSTIAT. Do not apply INSTIAT preemergence to coarse textured soils (sand, loamy sand, or sandy loam) with less than 1% organic matter. INSTIAT may be tank mixed with ATRAZIN, LYPHOSAT, DICAMBA,,4 D, CINCH, or BRAKFR. Keystone NXT.6 SC (acetochlor atrazine) qt lb lb 1 60 days 1 hours Comments: KYSTON NXT is a RSTRICTD US PSTICID. Apply KYSTON NXT after planting (or after corn emergence up to 11 inches in height). Planting should be done as close as possible to the time of application of KYSTON NXT to provide effective weed control during critical early season corn development. Do not apply more than 3.8 qt per of KYSTON NXT per season. KYSTON NXT may be tank mixed with AIM, ATRAZIN, BALANC PRO, BALANC FLXX, BANVL, CALLISTO, CALLISTO XTRA, CLARITY, DISTINCT, DURANO DMA, HORNT WD, LINX 4L, LOROX DF, MARKSMAN, PRINCP, PYTHON WD, RSOURC, or,4 D. Lexar 3.7 SC (s metolachlor mesotrione atrazine) 3.0 qt 1.31 lb 0.17 lb 1.31 lb days 4 hours Comments: LXAR is a RSTRICTD US PSTICID. Apply LXAR after planting (or after corn emergence up to 1 inches in height). Do not apply more than 3. qt per acre of LXAR per season. LXAR may be tank mixed with,4 D, ATRAZIN, PRINCP, RAMOXON, LYPHOSAT, LIBRTY, and WARRIOR. Conduct a tank mix compatability test each time,4 D is added to the tank mixture with LXAR. Temporary corn injury may occur if LXAR is applied to emerged corn that has received an at plant application of an organophosphate insecticide (except COUNTR). Do not make a postemergence application of LXAR to emerged corn with any organophosphate or carbamate insecticide, or severe crop injury may occur. Do not apply a solo HPPD inhibitor postemergence (i.e., CALLISTO, IMPACT, or LAUDIS) to ground that has been treated with LXAR in the same season. 3

15 Preemergence s for Weed Management in Field Corn (cont) Lumax 3.9 SC (s metolachlor mesotrione atrazine). qt 1.68 lb 0.17 lb 0.63 lb Mode of Action 1 7 ntry 60 days 4 hours Comments: LUMAX is a RSTRICTD US PSTICID. Apply LUMAX after planting (or after corn emergence up to 1 inches in height). Do not apply more than 3.0 qt per acre of LUMAX per season. LUMAX may be tank mixed with ATRAZIN, PRINCP, RAMOXON, LYPHOSAT, LIBRTY, and WARRIOR. Tank mixes with,4 D are allowed but should be done with extreme care with regard to compatability before mixing a load.,4 D batches vary greatly and should be tested for compatability each time a water or carrier source, water or carrier temperature, product source, or tank mixture recipe is changed. Prowl HO 3.8 CS pt lb 1 days 4 hours (pendimethalin) 3 Prowl 3.3 C pt lb Comments: Do not apply pendimethalin preplant incorporated or serious corn injury may result. Plant corn at least 1. in. deep. Corn seed must be completely covered with soil. Apply after planting before emergence of weeds. Use the higher rates on fine textured soils. In case of stand failure, corn seed should be replanted below the herbicide treated zone. Add ATRAZIN at 1.0 to.0 qt/a for control of broadleaf weeds. Python 80 WD (flumetsulam) 1.0 oz 0.0 lb 8 days 1 hours Comments: For areas where ATRAZIN cannot be used or in fields prone to flooding where soybeans may be re planted. Plant corn at least 1." deep. Mix with a preemergence grass herbicide and apply on the surface. Soil applied organophosphate insecticides should be applied in a T band or a band to avoid potential crop injury. Do not apply PYTHON if COUNTR or THIMT insecticides were applied previously. Other corn insecticides should be applied in a T band to avoid injury. Do not plant cotton within 18 months of application. Resicore 3.9SC (acetochlor mesotrione clopyralid).. qt lb lb lb hours Comments: Apply RSICOR after planting corn into a clean seedbed. RSICOR may be tank mixed with ATRAZIN for enhance residual broadleaf weed activity. Do not apply more than 3. qt of RSICOR per acre per year. Do not make more than two applications of RSICOR per year. Do not apply RSICOR (acetochlor) to the following soils within 0ft of any well where depth to ground water is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than % organic matter; or sandy loams with less than 1% organic matter. Resolve DF (rimsulfuron) 0..0 oz lb 30 days 4 hours Comments: Controls most annual grasses and broadleaves including broadleaf signalgrass. For control of emerged weeds at the time of application, add NIS at 1 qt/100 gal or COC at 1 gal/100 gal of spray solution plus qt/a of UAN (8 3% N) or lb/a of spray grade AMS. 36

16 Preemergence s for Weed Management in Field Corn (cont) (s) metolachlor (Dual 8/II Dual /II Mag. Dual Mag.7.6 C Dual II Mag C Cinch 7.64 C) 1..0 pt lb pt pt pt 1..0 lb 1..0 lb lb lb lb Mode of Action ntry 1 30 days 4 hours Comments: MTOLACHLOR and S MTOLACHLOR can be tank mixed with ATRAZIN. eneric formulations of MTOLACHLOR are also available. DUAL II and DUAL II MANUM contain a safener that helps reduce the possibility of injury from S MTOLACHLOR applications. Sharpen.8SC fl oz 80 days 1 hours (saflufenacil) lb 14 Comments: Apply SHARPN after planting but before crop emergence. For control of weeds that are emerged at time of planting, add MSO at 1 gal per 100 gal of spray solution plus ammonium nitrogen fertilizer (UAN at 1.. gals per 100 gal or AMS at lbs/100 gals). SHARPN may be tank mixed with LYPHOSAT, CLARITY, ATRAZIN, STATUS, HARNSS, HARNSS XTRA, VRDICT, PROWL HO, OUTLOOK, UARDSMAN MAX, and UARDSMAN MAX LIT. Do not apply SHARPN after corn emergence or severe crop injury will occur. Do not apply more than 6.0 fl oz (0.134 lb ai/a of saflufenacil) of SHARPN per cropping season. Do not apply SHARPN where an at planting application of an organophoshate or carbamate insecticide is planned or has occurred or severe crop injury may occur. However, SHARPN may be applied when AZTC or FORTRSS insecticides if applied at planting as a BAND, T BAND, or IN FURROW. SHARPN may be applied with all other classes of at planting insecticides including pyrethroids, neonictinoids, and fipronil. SureStart II 4. (acetochlor flumetsulam clopyralid) pt lb lb lb days 1 hours Comments: SURSTART II is a RSTRICTD US PSTICID. Apply SURSTART II after planting (or after crop emergence up to 11 inches in height) into a clean seedbed. Plant corn at least 1. deep. Use of SURSTART II on soils with less than 1.% organic matter may result in crop injury. If an ALS herbicide such as CANOPY, CLASSIC, PURSUIT, SCPTR, or SQUADRON was applied in the previous year, apply SURSTART II to corn only if the rotational restrictions have been met. xtended cold, wet conditions following application of SURSTART II to corn during germination and early crop development may result in crop injury. Injury symptoms including yellowing leaves or stunting are usually temporary and plants recover without affecting yield. Soil applied organophosphate insecticides (except TRBUFOS or PHORAT) must be applied in a T band or a band and not in furrow to avoid potential crop injury. Do not use COUNTR (TRBUFOS) or THIMT (PHORAT) insecticides. Other corn soil insecticides from other classes of chemistry may be applied in furrow, T banded, or banded. Do not apply SURSTART II (acetochlor) to the following soils within 0ft of any well where depth to ground water is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than % organic matter; or sandy loams with less than 1% organic matter. Do not apply more than 3 pt/a of SURSTART II in a single application. Do not plant cotton within 18 months of application. 37

17 Preemergence s for Weed Management in Field Corn (cont) Verdict.7C (saflufencil dimethenamid p) 10 1 fl oz lb lb Mode of Action 14 1 ntry 80 days 1 hours Comments: Apply VRDICT after corn planting but before crop emergence. If weeds are present at planting, add MSO at 1 gal per 100 gal of spray solution plus ammonium nitrogen fertilizer (UAN at 1.. gals per 100 gal or AMS at lbs/100 gals). VRDICT may be tank mixed with LYPHOSAT, CLARITY, ATRAZIN, STATUS, and SHARPN. Do not apply VRDICT after corn emergence or severe crop injury will occur. Do not apply more than lb ai/a saflufenacil from all product sources per cropping season. Do not apply more than fl oz of VRDICT per cropping season. Do not apply VRDICT where an at planting application of an organophoshate or carbamate insecticide is planned or has occurred or severe crop injury may occur. However, VRDICT may be applied when AZTC.1% granular, AZTC 4.67 granular, or FORTRSS granular insecticides is applied at planting as a BAND, T BAND, or IN FURROW. VRDICT may be applied with all other classes of at planting insecticides including pyrethroids, neonictinoids, and fipronil. Warrant 3.0 M 1..7 qt 1 hours (acetochlor) lb 1 Comments: Apply WARRANT after corn planting but before weeds germinate. Provides residual control of small seeded broadleaves and grasses. The optimum rate of WARRANT is 3 pt/a. Do not exceed 4.0 qt/a of WARRANT per season. Labeled tank mix partners include AIM, BALANC PRO, BALANC FLXX, CALLISTO, CLARITY, DISTINCT, LYPHOSAT, LINX 4L, LOROX DF, MARKSMAN, PRINCP, RSOURC,,4 D, ATRAZIN, and PARAQUAT. Do not apply ACTOCHLOR within 0ft of any well where depth to ground water is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than % organic matter; or sandy loams with less than 1% organic matter. Application of WARRANT followed by poor environmental conditions (cool wet soils and/or waterlogged soils) may result in crop response. Do not use WARRANT preplant, at planting, or preemergence to sweet corn. Zidua 0.8W oz 1 hours (pyroxasulfone) lb 1 Comments: Apply ZIDUA after planting corn but before crop emergence. Corn seed must be planted at least 1 inch deep. ZIDUA tank mix partners include ATRAZIN, LYPHOSAT, LIHTNIN, OUTLOOK, PROWL HO, SHARPN, and STATUS. On coarse textured soils, do not apply more than.7 oz/a of ZIDUA (0.14 lb ai/a of pyroxasulfone) per cropping season. On all other soil types, do not apply more than.0 oz/a of ZIDUA (0.66 lb ai/a of pyroxasulfone) per cropping season. 38

18 Weed Response to Postemergence s for Field Corn Weed Management 1 POSTMRNC Acuron Accent/NIC IT Aim Atrazine (ATZ) Balance Flexx Basagran Banvel/Clarity anoda, spurred F P P F barnyardgrass F P P P P P beggarweed, Florida F P bermudagrass P P P P P P P P P P P P P P F F F P P P P citronmelon F P F cocklebur, common F cowpea F P F F crabgrass P P P P P P P P P P crotolaria, showy F P croton, tropic F P crowfootgrass P P P P P P P P P P dayflower, Benghal F P F P F F PF eclipta F F F goosegrass P P P P P P P P P P jimsonweed F johnsongrass, seedling P F P P P P P F P F P johnsongrass, rhizome P P P P P P P P P P P P P P P F lambsquarters, common P F PF morningglory, annual F P PF F F nutsedge, purple P P P P F P P P P P F F F P P P P P nutsedge, yellow F P P PF F P PF P P F F F P F F F P PF P P panicum, fall P P P P P P F P P panicum, Texas F P F F P P PF P P P F P P F P F pigweed glyphosate resistant ALS resistant P P P P poinsettia, wild purslane, common P pusley, Florida P F P P P P F ragweed, common P F F F ryegrass, annual P P F P P F F F P P F F sandbur, field P F P P PF P P P F P P F P senna, coffee F P F P F F F F sesbania, hemp PF F F P P P F F F sicklepod PF P P P P P P P sida, prickly P F F P signalgrass, broadleaf P F P P P P P P P P P F P smartweed, Pennsylvania spurge F F F starbur, bristly P F velvetleaf F F PF F vol. peanut F P P F P P P vol. RR soybean P P P F P P 1 Key to Response Ratings: = excellent control, 90% or better; = good control, 80 to 90%; F = fair control, 70 to 80%; P = poor control, less than 70%; = Insufficient Data. Use only on glyphosate tolerant (Roundup Ready, Roundup Ready, Agrisure T) corn hybrids. 3 Use only on Liberty Link corn hybrids. 4 For control of listed weeds, these herbicides must be applied prior to weed emergence or tank mixed with a foliar active herbicide. Beacon P Buctril Cadet Callisto Capreno Corvus Distinct/Status xpert lyphosate P Halex T Impact/Armezon Keystone/Fultime 4 Laudis Liberty 3 F F F 39

19 Weed Response to Postemergence s for Field Corn Weed Mgmt (cont) 1 POSTMRNC POSTMRNC DIRCTD Marksman Option Prowl 4 Pursuit Realm Q Resolve Resolve Q anoda, spurred P P F P P barnyardgrass P P P P P P beggarweed, Florida F P P P P P bermudagrass P P P P P P P P P F P P P P P P P P P P citronmelon P PF PF F F cocklebur, common P P PF F P F cowpea P P P crabgrass, large P F F F F P PF F P P P P crotolaria, showy P P P croton, tropic P P PF crowfootgrass P F F F PF PF P P P P P dayflower, Benghal P F P F F eclipta P F F goosegrass P F F F PF PF P P P P P P jimsonweed P PF P P johnsongrass seedling P PF F PF PF P P P P P johnsongrass rhizome P P P P P P P P P P P P P P P lambsquarters, common P P PF PF PF F P F morningglory spp. F P F F P P PF P F nutsedge, purple F P P PF P P P F P P P P P P F F P nutsedge, yellow F P P F F P P F F P PF P P PF P F F PF panicum, fall P F F F F P P P P P panicum, Texas P F F PF F F F P P P P P pigweed glyphosate resistant ALS resistant P F F F P PF PF P PF PF P poinsettia, wild P F F purslane, common P P pusley, Florida P PF F F F F F F F ragweed, common P P P P F F F P ryegrass, annual P F P F F P P P P sandbur, annual P F P F F PF P PF PF P P P P senna, coffee P P F F F P sesbania, hemp P P P P P F P PF PF sicklepod F P P F F P PF F P P sida, prickly P F P P F F P F F signalgrass, broadleaf P F P F PF PF F P P P P P smartweed, Pennsylvania PF P P P F F F P PF F PF spurge F F starbur, bristly P P F F velvetleaf P PF PF F vol. peanut P P P P F P P P P P vol. RR soybean P P P P P F P P 1 Key to Response Ratings: = excellent control, 90% or better; = good control, 80 to 90%; F = fair control, 70 to 80%; P = poor control, less than 70%; = Insufficient Data. Use only on Clearfield corn hybrids. 3 Use only on glyphosate tolerant (Roundup Ready, Roundup Ready, Agrisure T) corn hybrids. 4 For control of listed weeds, these herbicides must be applied prior to weed emergence or tank mixed with a foliar active herbicide. Revulin Q Sandea F F P Sequence 3 P Steadfast/Q P Steadfast ATZ Stinger Warrant 4,4 D Aim vik Linex/Lorox ramoxone,4 D 40

20 Postemergence s for Weed Management in Field Corn Aatrex 4 SC (atrazine) qt Mode of Action lb None ntry 1 hours Comments: Apply ATRAZIN to corn from emergence up to 1 inches in height. Add COC at 1 gal per 100 gal of spray mix. If ATRAZIN was not applied prior to corn emergence, up to lbs ai/a may be applied. If an earlier ATRAZIN application was made, the total ATRAZIN applied may not exceed. lbs ai/acre per calendar year. Rainfast interval not indicated on label (suggest 1 hour minimum). Accent 7 DF (nicosulfuron) 0.67 oz lb 30 days 4 hours Accent Q 4. WD 0.9 oz NIC IT C.0 oz Comments: Apply ACCNT, ACCNT Q, or NIC IT overtop or with drop nozzles to control rhizome johnsongrass 8 to 18" tall. ACCNT, ACCNT Q, and NIC IT may be applied overtop corn up to 0 inches tall. For corn from 0 to 36 inches tall, use drop nozzles to avoid spraying in to the whorl of the plant. Add NIS at 1 qt/100 gal or COC at 1 gal/100 gal of spray mix plus qt/a of UAN or lb/a of AMS. Do not apply ACCNT, ACCNT Q, or NIC IT to corn previously treated with COUNTR 1, or COUNTR 0CR (in furrow) unless hybrid is IR (imidazolinone resistant). Injury may occur when ACCNT, ACCNT Q, or NIC IT is applied to corn previously treated with soil applied THIMT, LORSBAN or COUNTR 0CR T banded. In fields heavily infested with johnsongrass, apply only to virus tolerant hybrids. Do not use on sweet corn. Do not tank mix ACCNT, ACCNT Q, or NIC IT with foliar applied organophosphate insecticides as severe crop injury may occur. Certain corn hybrids are sensitive to ALS inhibitor herbicides (MOA=), consult your local seed dealer for more information. Rainfast interval = 4 hours. Acuron 3.44 SC (s metolachlor atrazine mesotrione bicyclopyrone) 1.. qt lb lb lb lb days 4 hours Comments: ACURON is a RSTRICTD US PSTICID. Apply ACURON from emergence up to 1 inches in height before broadleaf weeds are greater than 3 inches in height. Do not apply ACURON in liquid fertilizer or severe crop injury may occur. ACURON applied alone will not provide consistent postemergence control of emerged grass weeds. Do not apply more than. qt/a of ACURON per growing season. Tank mix partners include ATRAZIN, ACCNT Q, STADFAST Q, LYPHOSAT, and WARRIOR. Rainfast interval not indicated on label (suggest 1 hour minimum). Aim C (carfentrazone) Aim 1.9 W fl oz lb 14 3 days 1 hours Comments: Apply AIM broadcast to corn from emergence until 8 leaf collar growth stage (V8). xcellent control of small sicklepod, glyphosate resistant Palmer amaranth, and morningglory. Add a COC (1 gal/100 gals), NIS (1 qt/100 gals), or MSO (1 gal/100 gals). May be tank mixed with LYPHOSAT for broader spectrum weed control in Roundup Ready corn. **Consult AIM product label regarding specific recommendations for preharvest intervals. Rainfast interval = 6 hours 41

21 Postemergence s for Weed Management in Field Corn (cont) Armezon.8SC (topramezone) atrazine 4 SC fl oz pt lb lb Mode of Action 8 ntry 4 days 1 hours Comments: Apply ARMZON overtop corn from emergence up to 1 inches tall. For best results, add MSO or a COC at gal per 100 gal of spray mix plus a fertilizer solution of UAN at 1.. gal or spray grade AMS at lb per 100 gal (use higher adjuvant rates for periods where hot dry weather is expected). Do not apply more than 1.0 fl oz/a per season. ood to excellent control of glyphosate and ALS resistant and Palmer amaranth (less than 6 tall). Rainfast interval = 1 hour. Balance Flexx SC (isoxaflutole) atrazine 4 SC 6.0 fl oz 1.0 pt lb 0. lb 7 4 days 1 hours Comments: BALANC FLXX is a RSTRICTD US PSTICID. Apply BALANC FLXX overtop on corn from spiking through the leaf collar stage (V). Controls glyphosate and ALS resistant Palmer amaranth, sicklepod, and prickly sida. Add 0. lb/a ATRAZIN to enhance control of weeds larger than 6 inches (restricts broadcast application to corn 1 inches tall or less). Do not use COC or MSO with BALANC FLXX applied to emerged corn. Do not apply tank mixes of BALANC FLXX with organophosphate or carbamate insecticides to emerged corn. Foliar applications of organophosphote or carbamate insecticides should not be made within 7 days of an application of BALANC FLXX. If the water table (level of saturation) is less than feet below the ground surface, do not use BALANC FLXX on soils where the subsoil is loamy sand or sand (i.e., no clay subsoil). Rainfast interval = N/A (suggest 1 hour). Banvel/Clarity 4 S (dicamba) pt lb 4 ** 4 hours Comments: Apply BANVL or CLARITY at the 1.0 pt rate overtop corn from the spike stage up to 8 inch tall corn or leaf collar stage (V) to provide early control of vines and broadleaf weeds. Apply the 0. pt/a rate from the 8 inch tall up to 36 inch tall corn or 1 days before tassel emergence, whichever comes first. For best performance, apply when weeds are less than 3 inches tall. Use directed applications when corn leaves prevent proper spray coverage, sensitive crops are growing nearby, or tank mixing with,4 D. Do not apply BANVL or CLARITY under conditions which favor drift onto nearby crops. **Corn treated with BANVL or CLARITY may be harvested or used for feed once the crop has reached the milk stage of development. Rainfast interval not indicated on label (suggest 1 hour minimum). Basagran 4 S (bentazon) 1..0 pt lb 6 1 days 48 hours Comments: Treat when broadleaf weeds are small and actively growing. Do not apply to weeds that are under stress such as moisture or herbicide injury, as unsatisfactory control may result. Adjust rate according to weed size as indicated on the product label. Add COC to the spray tank at rate of 1 qt/a. Do not apply more than 4 pt per acre of BASARAN per season. Rainfast interval = 4 hours. Beacon 7 DF 0.76 oz 60 days 1 hours (primisulfuron) lb Comments: Apply BACON overtop, directed or semi directed to control rhizome johnsongrass 8 to 16 inches tall. BACON may be applied broadcast overtop corn up to 0 inches tall. Directed or semi directed applications may improve weed coverage and minimize crop injury. Add NIS at 1.0 qt/100 gal of spray mix, or COC at 1.0 to 4.0 pt/a. Do not apply BACON to corn previously treated with COUNTR 1, or COUNTR 0 CR (in furrow) unless hybrid is IR (imidazolinone resistant). Injury may occur where BACON is applied to corn previously treated with soil applied LORSBAN or COUNTR 0CR T banded. Certain corn hybrids are sensitive to ALS inhibitor herbicides (MOA=), consult your local seed dealer for more information. Rainfast interval = 4 hours. 4

22 Postemergence s for Weed Management in Field Corn (cont) Buctril 4 C (bromoxynil) atrazine 4 SC pt qt lb lb Mode of Action 6 ntry 4 days 4 hours Comments: Apply BUCTRIL overtop corn from 4 leaf growth stage (V4) up to before tassel emergence to control glyphosate and ALS resistant and Palmer amaranth (less than inches in height). Apply when weeds are in the to 4 leaf stage or less than 6 inches tall. Less danger of volatility drift than,4 D or BANVL. Tank mixtures with BANVL,,4 D, or CLARITY may cause stalk brittleness. Tank mixes with liquid fertilizers may cause excessive leaf burn. Rainfast interval not indicated on label (suggest 1 hour minimum). Cadet 0.91C 0.9 oz lb days 1 hours (fluthiacet methyl) Comments: Apply CADT broadcast to corn from leaf growth stage (V) up to 48 inches in height, but before tasseling. xcellent control of small sicklepod, glyphosate resistant Palmer amaranth, and morningglory. Add either a COC (1 pt/a) or NIS (1 qt/100 gals) plus UAN at 1 qt/a or spray grade AMS at 8. lb/100 gals. May be tank mixed with glyphosate for broader spectrum weed control in Roundup Ready corn. Do not apply more than 1. oz/a CADT per season. Rainfast interval = 4 hours. Callisto 4 SC (mesotrione) atrazine 4 SC 3.0 fl oz 1.0 qt lb 1.0 lb 7 4 days 1 hours Comments: Apply CALLISTO ATRAZIN overtop corn up to 1 inches tall. [Note: without ATRAZIN, CALLISTO may be applied to corn up to 30 inches tall or 8 leaf growth stage (V8)]. Provides good control of glyphosate and ALSresistant and Palmer amaranth. Apply before Palmer amaranth reaches inches. Always add COC at 1 gal/100 gal of spray mix and UAN at a rate of.% v/v or AMS at a rate of 8. lbs/100 gal. Do not use MSO adjuvants with CALLISTO as severe crop injury may occur. Do not apply more than 7.7 fl oz/a of CALLISTO per season. Do not make more than applications of CALLISTO per season. Delay second application until 14 days after the first. Rainfast interval = 1 hours. Capreno 3.4 SC (thiencarbazone tembotrione) atrazine 4 SC 3.0 fl oz 1.0 qt lb lb 1.0 lb 7 4 days 1 hours Comments: Apply CAPRNO overtop on corn from the 1 leaf collar stage (V1) up to the 6 leaf collar stage (V6). Controls glyphosate and ALS resistant Palmer amaranth, sicklepod, and prickly sida. Add 0. lb/a ATRAZIN to enhance control of weeds larger than 6 inches (restricts broadcast application to corn 1 inches tall or less). Add COC at 1 gal/100 gal of spray mix plus 1. qt/a of UAN or 1. lb/a of spray grade AMS. The use of NIS will decrease weed control performance. A sequential application of 3.0 fl oz can be made (wait a minimum of 14 days). Do not exceed 6.0 fl oz/a in a growing season. Do not use CAPRNO in the same season as LORSBAN, COUNTR, DYFONAT, or THIMT. Foliar applications of organophosphote or carbamate insecticides should not be made within 7 days of an application of CAPRNO. Certain corn hybrids are sensitive to ALS inhibitor herbicide (MOA=), consult your local seed dealer for more information. Rainfast interval = 1 hour. 43