Southeastern U.S. Vegetable Crop Handbook - 2022 - 364

WEED CONTROL
TABLE 4-24. CHEMICAL WEED CONTROL IN SQUASH (cont'd)
Weed
Herbicide,
Mode of Action Code*
and Formulation
SQUASH, Postemergence
Most emerged weeds glyphosate, MOA 9
(numerous brands and
formulations)
Yellow and purple nutsedge,
non-ALS-resistant
pigweed, broadleaf
weeds
Annual and perennial
grasses only
Amount of
Formulation
Per Acre
See labels
Pounds Active
Ingredient
Per Acre
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.
halosulfuron-methyl, MOA 2
(Sandea, Profine 75) 75 DG 0.5 to 1 oz
0.024 to 0.048 Row middles only. Apply to row middles as postemergence spray. In plasticulture,
do not allow spray to contact plastic. Early season application will give postemergence
and preemergence control. Do not apply within 30 days of harvest. For
postemergence applications, use nonionic surfactant at 1 qt per 100-gal of spray
solution.
clethodim, MOA 1
(Arrow, Clethodim,
Intensity, Select) 2 EC
(Intensity One, Select Max)
1 EC
sethoxydim, MOA 1
(Poast)1.5 EC
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 postemergence for control of grasses. Adding crop oil may increase
likelihood of crop injury at high air temperatures and high humidity. Very effective
control of annual bluegrass. Apply to actively growing grasses not under drought
stress. PHI = 14 days.
Apply to emerged grasses. Consult manufacturer's label for specific rates and best
times to treat and adjuvant and rate. Adding crop oil to Poast may increase the
likelihood of crop injury at high air temperatures and high humidity. PHI = 14 days.
TABLE 4-25. CHEMICAL WEED CONTROL IN SWEETPOTATOES (cont'd)
Weed
Herbicide,
Mode of Action Code*
and Formulation
SWEETPOTATO, Preplant
Annual and perennial
grass and broadleaf
weeds, stale seed bed
application
Broadleaf weeds and
some annual grasses
glyphosate, MOA 9
(numerous brands and
formulations)
caprylic acid, MOA 26
(Homeplate)
See labels
See labels
Apply to emerged weeds before transplanting. Perennial weeds may require higher
glyphosate rates. Consult label for rates for specific weeds. Certain glyphosate
formulations may require the addition of a surfactant. Adding nonionic surfactant to
glyphosate formulated with nonionic surfactant may result in reduced weed control.
See label
See label
May be applied prior to planting as a burndown treatment for emerged weeds, as
a preemergence application after seeding but before emergence, as a directed
or shielded application between rows, as a harvest aid or desiccant, or as a postharvest
application. Use higher spray volumes for high weed density and weeds
larger than 5 in. Coverage is important for acceptable weed control. May be tank
mixed with other herbicides. See label for further instructions.
Contact kill of all green
foliage, stale bed
application
Suppression or control
of most annual grasses
and broadleaf weeds,
full rate required for
nutsedge control
Palmer amaranth, redroot
pigweed, smooth
pigweed, Galinsoga
spp., black nightshade,
Eastern black
nightshade, common
purslane, partial control
of yellow nutsedge
Annual broadleaf
weeds including Palmer
amaranth and other
pigweeds, smartweed,
morningglory, wild
mustard, wild radish,
purslane spp., eclipta,
common lambsquarters
paraquat MOA 22
(Gramoxone SL 2.0) 2 SL
metam sodium
(Vapam HL) 42%
0.25 to 0.75
1 to 2 pt
15.7 to 31.5
37.5 to 75 gal
Apply to emerged weeds prior to transplanting sweetpotato. Paraquat product
labels require applicators to take an EPA-approved training every 3 years to mix,
load, and apply paraquat.
Rates are dependent on soil type and weeds present. For nutsedge, use 75-gal
per acre. Plant back interval is often 14 to 21 days and can be 30 days in some
environments. See label for all restrictions and additional information.
fomesafen, MOA 14
(Reflex) 2 EC
0.25
1 pt
This is a Section 24(c) special local needs label for sweetpotato. Check to make
sure reflex is registered for use in your state prior to making an application. See
label for further instructions. See label for potential carryover to rotational crops.
Apply prior to transplanting for preemergence control. May be tank-mixed with
other herbicides registered for preplant application however do not tank mix with
flumioxazin.
flumioxazin, MOA 14
(Valor SX) 51 WDG
0.094
3 oz
Apply prior to transplanting crop. Movement of soil during transplanting should
not occur or reduced weed control may result. Do not use on greenhouse-grown
transplants. Do not apply postemergence or serious crop injury will occur. Do not
use on transplant propagation beds. See label for further instructions.
Amount of
Formulation
Per Acre
Pounds Active
Ingredient
Per Acre
Precautions and Remarks
*Mode of action (MOA) code developed by the Weed Science Society of America.
364
2022 Vegetable Crop Handbook for Southeastern United States

Southeastern U.S. Vegetable Crop Handbook - 2022

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