Table 17.4. Herbicides approved for managing weeds in sweetcorn. (continued)
Labels change frequently. Be sure to read a current product label before applying any chemical.
Active ingredient Trade name MOA
lb. a.i./A product/A code Weeds controlled / remarks
*** POSTEMERGENCE ***
Atrazine (AAtrex) 4 L 5 Broadleaf and some grass weeds. Apply before weeds exceed 1.5 in. tall and before corn exceeds 12
in. in height. Do not exceed 2.5 lb. a.i./A per calendar year. Consult label for plant back restrictions on
rotational crops.
Mineral Mineral 2 - 4 pt.
1.0 - 2.0 Muck 4 - 6 pt.
Muck (AAtrex Nine-0) 90 WDG
2.0 - 3.0 Mineral 1.1 - 2.2 lb.
Muck 2.2 - 3.3 lb.
Bentazon (Basagran) 4 L 6 Certain broadleaf and sedge weeds. Consult label for weeds controlled/weed size table. Do not apply
0.75 - 1.0 1.5 - 2.0 pt. more than 4 pt./A per season.
Carfentrazone (Aim) 1.9 EW 14 Emerged broadleaf weeds. Apply up to the 14-leaf stage of corn growth. After the V8 stage of growth,
burndown and crop application. PHI 3 days.
0.008 - 0.016
(Aim) 2 EC
Halosulfuron (Sandea) 75 DF 2 Broadleaf and nutsedge weeds. Apply over-the-top or with drop nozzles from the spike to the layby
stage of corn. A sequential application of 0.66 oz./A may be with drop nozzles to avoid application to the
plant whorl. No more than 2 applications per year.
0.03 - 0.05 0.6 - 1.0 oz.
Mesotrione (Callisto) 4 SC 28 Broadleaf weeds. Treat up to 30 in. tall or up to the 8-leaf stage. Include a crop oil concentrate or
season.
0.094
Nicosulfuron (Accent) 75 WDG 2 Broadleaf and grass weeds. Sensitivity to sweet corn varieties is variable. Do not apply to ‘Merit’
sweet corn. Do not apply to corn that has previously been treated with ‘Counter’, ‘Lorsban’, or ‘Thimet’
insecticides for this may result in injury. Consult label for acceptable insecticides. Apply broadcast to
corn plants less than 12 in. tall. Apply with drop nozzles to direct spray to corn plants 12 - 18 in. tall.
0.03 - 0.06 0.6 - 1.3 oz.
(Accent Q) 54.5 WDG
0.9 - 1.8 oz.
Pendimethalin (Acumen, Prowl) 3.3 EC 3 Broadleaf and grass weeds. Apply after 4 in. tall until corn is 20 to 24 in. tall or the V8 growth stage.
Mineral Mineral 1.8 - 2.4 pt. Direct the spray to the base of the plants.
0.75 - 1.0 Muck 2.4 - 4.8 pt.
Muck (Prowl H20) 3.8
1.0 - 2.0 Mineral 2.0 - 3.0 pt.
Muck 2.0 - 4.0 pt.
S-metolachlor (Brawl, Dual Magnum) 7.62 EC 15 Annual broadleaf and grass weeds. Apply after crop emergence up to 40 in. in height. Direct spray to
the base of the plants when plants are taller than 5 in. Use a lower rate on lighter soils. Weed control is
increased with 0.5 to 1 in. of rainfall or irrigation. Do not exceed 3.9 pt./A per crop year depending on
soil texture. PHI 30 days.
up to 1.9 up to 2.0 pt.
(Cinch, Dual II Magnum) 7.64 EC
up to 2.0 pt.
Tembotrione (Laudis) 3.5 EC 28 Annual broadleaf and grass weeds. Crop tolerance is dependent on variety so apply to a small area if
tolerance is unknown. Do not use on Merit or Shogun. May be applied from corn emergence through the
0.08
Topramezone (Armezon, Impact) 2.8 28 Broadleaf and grass weeds. Consult label for maximum size of certain weed species for control. PHI 45
0.02 - 0.022 days.
2019 Vegetable Production Handbook of Florida 335