Southeastern U.S. Vegetable Crop Handbook - 2021 - 331

WEED CONTROL
TABLE 4-9. CHEMICAL WEED CONTROL IN CORN, SWEET (cont'd)
Weed
Herbicide,
Mode of Action Code* and
Formulation
CORN, SWEET, Preemergence (cont'd)
Most annual grass
weeds, including fall
panicum, broadleaf
signalgrass, and
small-seeded broadleaf
weeds
dimethenamid, MOA 15
(Outlook) 6.0 EC
metolachlor, MOA 15
(Me-Too-Lachlor II) 7.8 EC
(Parallel) 7.8 EC
S-metolachlor, MOA 15
(Brawl II, Dual II Magnum,
Medal II) 7.64 EC
pyroxasulfone, MOA 15
(Zidua) 85 WG
0.56 to 1.0
12 to 21 oz
Apply to soil surface immediately after planting. May be tank mixed with atrazine,
glyphosate, or paraquat. See label for other herbicides that may be tank mixed to
broaden weed control spectrum.
1 to 2 pt
1 to 2 pt
0.98 to 1.98 See comments for S-metolachlor products. Products containing S-metolachlor
are more active on weeds per unit of formulated product than those containing
metolachlor. See label for all instructions.
0.95 to 1.91
Apply to soil surface immediately after planting. May be tank mixed with atrazine,
glyphosate, or simazine. Check label for directions. Rate is soil-texture and organic-matter
dependent. See label for details. Dual II Magnum contains the corn
safener benoxacor, thus is safer on sweet corn than Dual Magnum, which does
not contain benoxacor.
1.5 to 4 oz
0.0796 to 0.213 Rate ranges based on soil texture. See label for specific rate relating to your
fields. Sweetcorn seed must be planted a minimum of 1 in. deep. Provides suppression
of Texas panicum, seedling johnsongrass, and shattercane. Do not harvest
sweet corn ears for human consumption less than 37 days after application
of this herbicide. See label regarding tank mixtures for broader spectrum control
and/or control of emerged weeds.
Most annual broadleaf
and grass weeds
atrazine, MOA 5
(various brands) 4 F
(various brands) 90 WDG
dimethenamid, MOA 15
+ atrazine, MOA 5
(Guardsman Max) 5 F
S-metolachlor, MOA 15
+ atrazine, MOA 5
(Bicep II Magnum) 5.5 F
1 to 2
1 to 2 qt
1.1 to 2.2 lb
0.5 to 1
+
2.4 to 4.6 pt
1 to1.9
0.78 to 1.56
+
1.3 to 2.6 qt
1 to 2
Apply to soil surface immediately after planting. Shallow cultivations will improve
control. Check label for restrictions on rotational crops. See label for reduced rate
if soil coverage with plant residue is less than 30% at planting. Does not control
fall panicum or smooth crabgrass. May be tank mixed with metolachlor, alachlor,
glyphosate, paraquat, bentazon, or simazine. Check label for directions.
Apply to soil surface immediately after planting. Does not control Texas panicum,
seedling johnsongrass, or shattercane adequately. Adjust rate for soil texture and
organic matter according to label. See label for reduced rate if soil coverage with
plant residue is less than 30% at planting. See labels for comments on rotational
crops. See label for additional instructions.
Apply to soil surface immediately after planting. Does not adequately control
Texas panicum, seedling johnsongrass, or shattercane. May not adequately
control cocklebur, morningglory, or sicklepod. Cultivation or other herbicides may
be needed. See label for rates based on soil texture and organic matter and
for information on setback requirements from streams and lakes. See label for
reduced rate if soil coverage with plant residue is less than 30% at planting and
for comments on rotational crops.
Small seeded broadleaf
weeds and some
annual grass weeds
Broadleaf weeds,
including large-seeded
weeds such as cocklebur
and annual grass
and partial control of
yellow nutsedge
saflufenacil, MOA 14
+ dimethenamid, MOA 15
(Verdict) 5.57 EC
bicyclopyrone, MOA27
+ mesotrione, MOA27
+S-metolachlor, MOA 15
(AcuronFlexi) 2.86 L
S-metolachlor, MOA 15
+ atrazine, MOA 5
+mesotrione, MOA 27
+bicyclopyrone, MOA 27
(Acuron) 3.44 L
Grass and broadleaf
weeds
Broadleaf and grass
weeds
pendimethalin, MOA 3
(Prowl H2
O) 3.8 AS
simazine, MOA 5
(Princep) 4L
CORN, SWEET, Postemergence
Most annual broadleaf
and grass weeds
atrazine, MOA 5
(various brands) 4 L
(various brands) 90 WDG
dimethenamid, MOA 15
(Outlook) 6.0 EC
+
atrazine, MOA 5
(AAtrex) 4 F or 90 WDG
0.43 to 0.78
10 to 18 oz
1.6 to 1.8
2 to 2.25 qt
1.34 to 1.61
+ 0.625 to
0.75
2.5 to 3 qt
2 to 4 pt
1.6 to 2
1.6 to 2 qt
2
2 qt
2.2 lb
8 to 21 oz
+
See labels
0.375 to 1
+
See labels
+0.15 to 0.18
+0.038 to 0.045
1 to 2
Apply preemergence before crop germinate or postemergence until sweet corn is
20 to 24 in. tall or in the V8 growth stage whichever is more restrictive. Do not apply
in reduced, minimum, or no-till sweet corn. Rate is dependent on organic matter
content. See label for additional information. See label for tank mix options.
Apply preemergence before weeds and crop emerge. See label for tank mix
options. PHI = 45 days.
Atrazine cannot exceed 2.5 lb a.i.per acre per calendar year. Apply overtop
before weeds exceed 1.5 in. in height. See label for additional information in
controlling larger weeds. See label for amount of oil concentrate to add to spray
mix. See label on setback requirements from streams and lakes.
Apply overtop corn before crop reaches 12 in. tall and before weeds exceed
the two-leaf stage. Larger weeds will not be controlled. Good residual control of
annual grass and broadleaf weeds. Do not apply within 50 days of sweet corn
ear harvest. Do not apply to corn 12 in. or taller. Also available as the commercial
products Guardsman or LeadOff.
Apply preplant or preemergence to sweet corn. Severe injury will occur if applied
to emerged sweet corn.
Apply preplant or preemergence to sweet corn. Severe injury will occur if applied
to emerged sweet corn.
Registered for processing sweet corn only. Apply preplant surface, preplant incorporated
or preemergence after seeding. Do not apply to emerged sweet corn.
Amount of
Formulation
Per Acre
Pounds Active
Ingredient
Per Acre
Precautions and Remarks
2021 Vegetable Crop Handbook for Southeastern United States
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Southeastern U.S. Vegetable Crop Handbook - 2021

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