CORN (Sweet or Pop)


Weed Problem   Chemical   Pounds Active Ingredient (AI)/Acre   Amount of Commercial Product/Acre   Remarks and Limitations

Emerged annuals   paraquat
(GRAMOXONE SL 2.0)
  0.5  
2 pt
  Apply before or after planting but before corn emerges to kill emerged weeds. RUP.

Preemergence   acetachlor
(HARNESS+ 7E)
(SURPASS 6.4EC)
  0.8-3  
0.9-3.4 pt
1-3.75 pt
  May be preplant incorporated or applied to surface after planting. Check label for rate for soil type. Controls many broadleaves and grasses. RUP.

  alachlor
(MICRO-TECH 4E)
  2-4  
2-4 qt
  Apply soon after planting and before weeds emerge. Controls primarily grasses. RUP.

  atrazine
(AATREX 4L)
  1-2  
1-2 qt
  Apply soon after planting. Observe rotation restrictions. RUP. May be applied postemergence for broadleaf weed control.

  dimethenamid-P
(OUTLOOK 6E)
  0.56-0.98  
12-21 fl oz
  Apply PPI or PRE. Check label for rate for soil type. Some hybrids may be sensitive. Controls many broadleaves, grasses and nutsedge. 50-day PHI.

  mesotrione
(CALLISTO 4SC)
  0.09-0.24  
3-7.7 fl oz
  SWEET CORN, YELLOW POP CORN.

PREEMERGENCE: apply 6-7.7 fl oz after seeding.

POSTEMERGENCE: apply 3 fl oz to corn up to 30 inches tall.
Add 0.25% NIS. Maximum 2 applications pre and post. 45-day PHI. Most vegetable crops have an 18-month rotational restriction.

  pendimethalin
(PROWL H20 3.8 ACS)
  0.7-1.9  
0.75-2 pt
  Apply preemergence or postemergence up to 24-inch tall corn. Plant 1.5 inch deep. Use drop nozzles for better soil distribution postemergence. Use low rate on light soil. Controls annual grasses, wild proso millet.

  pyroxasulfone
(ZIDUA 85 WDG)
  0.08-0.21  
1.5-4 oz
  Apply after seeding corn for control of amaranths, pigweeds and annual grasses. 37-day PHI

  s-metolachlor
(DUAL MAGNUM 7.62EC)
  1.2-1.9  
1.3-2 pt
  Apply soon after planting and before weeds emerge. Controls primarily grasses. Some nutsedge activity.

  saflufenacil
(SHARPEN 2.85 SC)
  0.045-0.0778  
2-3.5 fl oz
  POPCORN. Use for horseweed control. Apply to soil surface after planting. Do not apply after corn emergence. Do not use with an OP or carbamate soil insecticide. 0 PHI.

Postemergence traited corn   glufosinate
(LIBERTY 280 2.34 SL)
  0.37  
20 fl oz
  ATTRIBUTE and ATTRIBUTE II (LIBERTY LINK) CORN ONLY. Apply from emergence to 24 inch corn. Max. of 40 fl oz/acre/yr. Include AMS @ 17 lb/100 gal mix. May be mixed with other post herbicides. 50 day PHI.

  glyphosate
(ROUNDUP POWERMAX 5.5L)
  0.69-0.95  
16-22 fl oz
  ROUNDUP TOLERANT CORN ONLY. Apply from emergence to 30 inch corn. Maximum of 4.1 qt/acre/yr. May be mixed with other post herbicides. 30 day PHI.

Postemergence broadleaves   2,4-D
(WEEDAR 64 3.8L)
  0.5  
1 pt
  SWEET CORN. Apply before sweet corn is 8 inches tall. Spray under low-wind conditions; drift can cause serious injury to adjacent crops. 2,4-D may injure some supersweet hybrids.

  bentazon
(BASAGRAN 4L)
  0.75-1  
1.5-2 pt
  Apply when weeds are small. Apply twice for nutsedge control. Include 1 qt COC/acre.

  bromoxynil
(MOXY 2E)
  0.25-0.375  
1-1.5 pt
  POPCORN only. Apply prior to tasseling of corn. Controls only broadleaves. 30-day PHI.

  carfentrazone
(AIM 2EC)
  0.008  
0.5 fl oz
  Use in tank mix with other post herbicides. Controls morning glory, lambsquarters, pigweed, velvetleaf. Some sweet corn cultivars are sensitive to Aim. Add 0.5 pt NIS/acre.

  clopyralid
(STINGER 3L)
  0.125-0.25  
5.3-10.6 fl oz
  SWEET, YELLOW POP CORN. Apply before sweet corn is 18-inches tall or popcorn is 24-inches tall. Kills composite weeds, legumes, nightshade. Maximum 2 applications and 2/3 pt/acre/year. 30-day PHI. 10.5- to 18-month rotation restriction.

  diflufenzopyr +
 dicamba
(DISTINCT 70SP)
  0.18-0.26  
4-6 oz
  POPCORN. Apply 6-oz early postemergence or 4 oz mid-postemergence. Include 0.25% NIS. Controls many broadleaves, including hemp dogbane and common milkweed. 72-day PHI.

  fluroxypyr
(STARANE ULTRA 2.8 L)
  0.14  
0.4 pt
  SWEET CORN: Broadcast to corn up to V4 stage. Apply to larger corn with drop nozzles. Controls several broadleaves. Some hybrids may be sensitive. 31 day PHI.

  fluthiacet-methyl
(CADET 0.91 L)
  0.004-0.006  
0.6-0.9 fl oz
  Controls velvetleaf and several other broadleaves. Apply from 2 collars to tasseling. Maximum 1.25 fl oz/acre/year. Add COC or NIS. 40 day PHI

  halosulfuron
(PERMIT 75WSG)
(SANDEA 75 WDG)
  0.032-0.047  
0.67-1 oz
0.67-1 oz
  Apply to corn from spike to layby stage. If needed, make a second application as a directed spray. Include 0.25% NIS. Do not apply to Jubilee sweet corn or any corn under stress. Controls nutsedge. Observe rotational restrictions. 30 day PHI

Postemergence grasses and broadleaves   foramsulfuron
(OPTION 35WDG)
  0.033-0.038  
1.5-1.75 oz
  Use for crop rescue only. Hybrids must be tested and known to be safe before use. Add an adjuvant and nitrogen source. Controls many grasses and broadleaves. 60-day rotational restriction for most crops. 45-day PHI.

  nicosulfuron
(ACCENT 75SP)
  0.031  
0.67 oz
  POP, SWEET. Apply broadcast to sweet corn up to 12 inches tall or apply to corn 12-18 inches tall or 6 collars using drop nozzles. One application/year. Some corn hybrids are sensitive to Accent. Controls several broadleaves, foxtails, fall panicum and wildoats. Include 0.25% NIS/acre.

  primisulfuron
(BEACON 75DG)
  0.036  
0.76 oz
  POPCORN. Apply to corn 4-20 in. or taller. Beacon may injure popcorn. Controls some broadleaves and foxtails, fall panicum, quackgrass. Add 0.25% NIS. 60-day PHI.

  tembotrione
(LAUDIS 3.5SC)
  0.082  
3 fl oz
  Apply from emergence to V7 stage. Controls most grasses and broadleaves. Add an adjuvant and nitrogen source. Most vegetable crops have an 18 month rotational restriction. Controls broadleaves and barnyardgrass, crabgrass, foxtails.

  topramezone
(IMPACT 2.8 L)
  0.0164  
0.75 fl oz
  Apply to weeds up to 4 inches high; include 1% COC or MSO plus 1.25% UAN or 10-15 lb AMS/acre. 45-day PHI. Most vegetable crops have an 18-month rotational restriction. Controls most annual broadleaves and grasses.