Southeastern U.S. Vegetable Crop Handbook - 2021 - 332

WEED CONTROL
TABLE 4-9. CHEMICAL WEED CONTROL IN CORN, SWEET (cont'd)
Weed
Herbicide,
Mode of Action Code* and
Formulation
CORN, SWEET, Postemergence (cont'd)
Annual grasses and
broadleaf weeds
(cont'd)
S-metolachlor, MOA 15
(Dual II Magnum)
7.64 EC
+
atrazine, MOA 5
(AAtrex) 4 F
(AAtrex) 90 WDG
Cocklebur, common
ragweed, jimsonweed,
Pennsylvania
smartweed, velvetleaf,
yellow nutsedge, and
morningglory
bentazon, MOA 6
(Basagran) 4 SL
0.5 to 1
1 to 2 pt
Apply early postemergence overtop when weeds are small and corn has one to
five leaves. See label for rates according to weed size and special directions for
annual morningglory and yellow nutsedge control. Use a crop oil at a rate of 1 qt
per acre.
Many broadleaf weeds mesotrione, MOA 27
(Callisto) 4 EC
0.094
3 oz
Apply overtop corn 30 in. or less or 8 leaves or less to control emerged broadleaf
weeds. Use nonionic surfactant at 2 pt per 100 gal of spray solution. DO NOT
add VAN or AMS when making post application in sweet corn or severe injury will
occur. Most effective on small weeds, however, if weeds are greater than 5 in. or
for improved control of certain weeds, certain atrazine formulations may be mixed
with this herbicide. See label for further information. PHI = 45 days.
Annual broadleaf
weeds and some
grasses
tembotrione, MOA 27
(Laudis) 3.5 L
0.082
3 oz
Can be applied overtop or with drop nozzles to sweet corn from emergence
up to V7 stage. Controls most broadleaf weeds. Does not control sicklepod or
prickly sida and only suppresses morningglory. Controls or suppresses some
grasses. See label for weeds controlled and recommended size for treatment.
Herbicide sensitivity in all hybrids and inbreds of sweet corn has not been tested.
See label for information on adjuvant use. May be tank mixed with atrazine to
increase weed spectrum and consistency of control. If tank mixed with atrazine,
do not apply if corn is 12 in. tall or greater. See label for further restrictions and
instructions.
topramezone, MOA 27
(Impact) 2.8 L
0.016
0.75 oz
Can be applied overtop or with drop nozzles to sweet corn from emergence until
45 days prior to harvest. Does not control sicklepod and only suppresses morningglory.
Controls or suppresses some grasses. See label for weeds controlled
and recommended size for treatment. This product has not been tested on all
inbred line for tolerance. See label for information on adjuvant use. See label for
further restrictions and instructions. Do not apply within 45 days of sweet corn ear
harvest.
topramezone, MOA 27
+
dimethenamid, MOA 15
(Armezon) 5.26 L
Velvetleaf, spreading
dayflower, morningglory
species, and redroot
pigweed. Will not
control grasses.
Annual broadleaf
weeds
fluthiacet-methyl, MOA 14
(Cadet) 0.91 L
14 to 24 oz
0.6 to 0.9 oz
0.0042 to 0.06 Processing sweet corn only. Apply to small weeds, generally about 2 in. tall. Will
control large velvetleaf up to 36 in. See label for information on adjuvant use. See
label for further restrictions and instructions.
fluthiacet-methyl, MOA 14
+ mesotrione, MOA 27
(Solstice)
Velvetleaf, pigweed,
nightshade, morningglory,
common
lambsquarters
carfentrazone-ethyl, MOA 14
(Aim) 2.0 EC
0.5 oz
2.5 to 3.15 oz
0.004 to 0.0053
0.074 to 0.0931
0.008
Apply up to the V8 growth stage (or 30 in. tall). See label for crop rotation
restrictions. Do not include nitrogen based adjuvants (UAN or AMS) when making
postemergence application or severe injury will occur. Use nonionic surfactant
at 1 qt per 100 gallons of spray. Do not apply within 40 days of sweet corn ear
harvest. See label for further instructions.
Apply postemergence to actively growing weeds less than 4 in. high (rosettes
less than 3 in. across) up to the 14-leaf collar stage of corn. Rates above 0.5 oz
will aid in controlling larger weeds and certain weeds (see label for specific rate).
Directed sprays will lessen the chance of crop injury and allow later application.
Coverage of weeds is essential for control. Use nonionic surfactant (2 pt per
100 gal of spray) with all applications. Under dry conditions, the use of crop oil
concentrate may improve weed control. Mix with atrazine to improve control of
many broadleaf weeds. Limited information is available concerning the use of this
product in sweet corn. Do not apply more than 2 oz per acre per seasonPHI = 3
days.
Broadleaf weeds
including sowthistle,
clover, cocklebur,
jimsonweed, ragweed,
Jerusalem artichoke
and thistle
clopyralid, MOA 4
(Stinger) 3 EC
0.25 to 0.67 pt
0.095 to 0.25 Processing sweet corn only. Apply to sweet corn when weeds are small (less
than 5-leaf stage) and actively growing. Addition of surfactants, crop oils, or other
adjuvants is not usually necessary when using Stinger. Use of adjuvants may
reduce selectivity to the crop. Do not apply to sweet corn over 18 in. tall. Will
control most legumes. PHI = 30 days.
0.6 to 1
Do not apply to sand textured soils with less than 3% organic matter.
1 to 1.67 pt
+
1 to 2 qt
1.3 to 2.2 lb
0.95 to 1.58
+
1 to 2
Apply overtop corn (5 in. or less) before weeds exceed the two-leaf stage. Larger
weeds will not be controlled. Do not apply within 30 days of sweet corn ear harvest.
Good residual control of annual grass and broadleaf weeds. Also available
as Bicep II or Bicep II Magnum.
Amount of
Formulation
Per Acre
Pounds Active
Ingredient
Per Acre
Precautions and Remarks
332
2021 Vegetable Crop Handbook for Southeastern United States

Southeastern U.S. Vegetable Crop Handbook - 2021

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