Southeastern U.S. Vegetable Crop Handbook - 2023 - 338

WEED CONTROL
TABLE 4-8. CHEMICAL WEED CONTROL IN COLE CROPS: BROCCOLI, CABBAGE, CAULIFLOWER (CONT'D)
Weed
Herbicide,
Mode of Action Code*
and Formulation
Amount of
Formulation
Per Acre
See labels
Pounds Active
Ingredient
Per Acre
COLE CROPS: BROCCOLI, CABBAGE, CAULIFLOWER - Postemergence
Most emerged weeds glyphosate, MOA 9
(numerous brands and
formulations)
Most broadleaf weeds
less than 4 in. tall or
rosettes less than 3 in.
in diameter; does not
control grasses
Broadleaf weeds
including sowthistle,
clover, cocklebur, jimsonweed,
and ragweed
Annual and perennial
grasses only
carfentrazone-ethyl,
MOA 14
(Aim) 1.9 EW or 2 EC
clopyralid, MOA 4
(Stinger) 3 EC
clethodim, MOA 1
(Arrow, Clethodim, Intensity,
Select) 2 EC
(Select Max) 1 EC
sethoxydim, MOA1
(Poast) 1.5 EC
Up to 2 oz
See labels
Precautions and Remarks
Row middles only. Apply as a hooded spray in row middles, as shielded
spray in row middles, as wiper applications in row middles, or postharvest.
To avoid severe injury to crop, do not allow herbicide to contact foliage,
green shoots, stems, exposed, roots, or fruit of crop. PHI = 14 days.
Up to 0.031 Apply post-directed using hooded sprayers for control of emerged weeds.
If crop is contacted, burning of contacted area will occur. Use crop oil concentrate
at up to 1-gal per 100-gal solution or a nonionic surfactant at 2 pt
per 100-gal of spray solution. Coverage is essential for good weed control.
Can be tank mixed with other registered herbicides.
0.25 to 0.5 pt
0.09 to 0.187 Labeled for broccoli, cabbage, cauliflower, broccoli raab, Brussels sprouts,
Cavolo broccoli, Chinese cabbage (bok choy), Chinese broccoli, Chinese
mustard, and Chinese cabbage (Napa). Apply to crop when weeds are
small and actively growing. Will control most legumes. PHI = 30 days.
6 to 8 oz
9 to 16 oz
1 to 1.5 pt
*Mode of action (MOA) code developed by the Weed Science Society of America.
0.094 to 0.125
0.07 to 0.125
0.2 to 0.3
Apply to emerged grasses. Consult manufacturer's label for specific rates
and best times to treat. See label for adjuvant and rate. Adding crop oil
to Poast or Select may increase the likelihood of crop injury at high air
temperature and high humidity. PHI = 30 days.
TABLE 4-9. CHEMICAL WEED CONTROL IN CORN, SWEET (CONT'D)
Weed
Herbicide,
Mode of Action Code*
and Formulation
CORN, SWEET, Preplant Burndown
Most broadleaf weeds
less than 4 in. tall or
rosettes less than 3 in.
in diameter; does not
control grasses
carfentrazone-ethyl,
MOA 14
(Aim) 1.9 EW or 2 EC
Up to 2 oz
Amount of
Formulation
Per Acre
Pounds Active
Ingredient
Per Acre
Precautions and Remarks
Up to 0.031 Apply prior to planting or within 24 hours after planting. Use a crop oil
concentrate or a nonionic surfactant with Aim. For optimum performance,
make applications to actively growing weeds up to 4 in. high or rosettes
less than 3 in. across. Coverage is essential for good weed control.
Optimum broad-spectrum control of annual and perennial weeds requires
a tank mix with burndown herbicides such as glyphosate, paraquat or
2,4-D. Must be applied prior to the pre-harvest interval of 14 leaf collars.
See label for directions.
Contact kill of all green
foliage, stale bed,
and minimum tillage
application
paraquat, MOA 22
(Parazone) 3 SL
(Gramoxone SL) 2 SL
0.6 to 1
1.5 to 2.7 pt
2.4 to 4 pt
Apply in a minimum of 20-gal spray mix per acre to emerged weeds before
crop emergence as a broadcast or band treatment over a preformed
row. Seed- beds should be formed several days ahead of planting and
treating to allow maximum weed emergence. Plant with a minimum of
soil movement for best results. Use a nonionic surfactant at a rate of 16
to 32 oz per 100-gal spray mix or 1 gal approved crop oil concentrate
per 100-gal spray mix. May be tank mixed with preemergence sweetcorn
herbicides and herbicide combinations. Check label for directions and
specific rates. Paraquat product labels require applicators to take an
EPA-approved training every 3 years to mix, load, and apply paraquat.
Annual and perennial
grass and broadleaf
weeds, stale bed
application
glyphosate, MOA 9
(numerous brands and
formulations)
See labels
See labels
Apply to emerged weeds before crop emergence. Do not feed crop
residue to livestock for 8 weeks following treatment. Perennial weeds may
require higher rates of glyphosate. Consult manufacturer's label for rates
for specific weeds. Check label for directions. Certain glyphosate formulations
require addition of surfactant. Adding nonionic surfactant to glyphosate
formulated with nonionic surfactant may result in reduced weed
control. Glyphosate-resistant horseweed (marestail) is now common in
eastern North Carolina counties. If horseweed is present at planting time,
a tank mixture of paraquat and atrazine is suggested.
*Mode of action (MOA) code developed by the Weed Science Society of America.
338
2023 Vegetable Crop Handbook for Southeastern United States

Southeastern U.S. Vegetable Crop Handbook - 2023

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