Southeastern U.S. Vegetable Crop Handbook - 2021 - 324

WEED CONTROL
TABLE 4-4. CHEMICAL WEED CONTROL IN CANTALOUPES (MUSKMELONS) (cont'd)
Weed
Herbicide,
Mode of Action Code*
and Formulation
Suppression or control
of most annual grasses
and broadleaf weeds,
full rate required for
nutsedge control
Broadleaf weeds and
some annual grasses
metam sodium
(Vapam HL) 42%
Amount of
Formulation
Per Acre
CANTALOUPE (MUSKMELON), Preplant and Preemergence
15.7 to 31.5
37.5 to 75 gal
For nutsedge control, use 75 gal per acre. Rates are dependent on soil type and
weeds present. Apply when soil moisture is at field capacity (100 to 125%).Apply
through soil injection using a rotary tiller or inject with knives no more than 4 in.
apart; follow immediately with a roller to smooth and compact the soil surface or
with mulch. May apply through drip irrigation prior to planting a second crop on
mulch. 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.
caprylic acid, MOA 26
(Homeplate)
Most broadleaf weeds
less than 4 in. tall or
rosettes less than 3 in.
in diameter; does not
control grasses
Contact kill of all green
foliage, stale bed
application
carfentrazone-ethyl,
MOA14
(Aim) 1.9 EW or 2 EC
Up to 2 oz
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, 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.
Up to 0.031
Transplant crop. Apply no later than one day before transplanting crop.
Seeded crop. Apply no later than 7 days before seeding crop.Use a crop oil at
up to 1 gal per 100 gal of spray solution or 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 burndown herbicides.
paraquat, MOA 22
(Parazone) 3 SL
(Gramoxone SL) 2 SL
0.5 to 1
1.3 to 2.7 pt
2 to 4 pt
Apply in a minimum of 10 gal spray mix per acre to emerged weeds before crop
emerges or before transplanting as a broadcast or band treatment over a preformed
row. Seedbeds or plant beds should be formed as far ahead of treatment
as possible to allow maximum weed emergence. 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. Paraquat product labels require applicators to take an
EPA-approved training every 3 years in order 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 at least 3 days before seeding or transplanting. Perennial
weeds may require higher rates of glyphosate. Consult manufacturer's label
for rates for specific weeds. When applying Roundup before transplanting crops
into plastic mulch, carefully remove residues of this product from the plastic prior
to transplanting. To prevent crop injury, residues can be removed by 0.5 in. rainfall
or by applying water via a sprinkler system. 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.
Emerged broadleaf
weeds
Emerged broadleaf
and grass weeds
Annual grasses and
small-seeded broadleaf
weeds
Annual grasses and
broadleaf weeds;
weak on pigweed and
morningglory
Annual grasses and
some small-seeded
broadleaf weeds
pyraflufen, MOA 14
(ET Herbicide) 0.208 EC
pelargonic acid, MOA 26
(Scythe) 4.2 EC
bensulide, MOA 8
(Prefar) 4 EC
clomazone, MOA 13
(Command) 3 ME
ethalfluralin, MOA 3
(Curbit) 3 EC
0.5 to 2 oz
See label
5 to 6
5 to 6 qt
0.15 to 0.25
0.4 to 0.67 pt
1.1 to 1.7
3 to 4.5 pt
0.0008 to 0.003 Apply as a preplant burndown treatment in a minimum of 10 gallons per acre.
Addition of a crop oil concentrate at 1 to 2% is recommended for optimum weed
control. See label for additional information.
See label
Apply before crop emergence and control emerged weeds. There is no residual
activity. May be tank mixed with soil residual compounds. See label for instruction.
May also be used as a banded spray between row middles. Use a shielded
sprayer directed to the row middles to reduce drift to the crop.
Apply preplant and incorporate into the soil 1 to 2 in. (1 in. incorporation is optimum)
with a rototiller or tandem disk, or apply preemergence after seeding and
follow with irrigation. Check re-plant restrictions for small grains and other crops
on label.
Apply immediately after seeding or just prior to transplanting with transplanted
crop. Roots of transplants must be below the chemical barrier when planting. See
label for further instruction.
Apply post plant to seeded crop prior to crop emergence, or as a banded spray
between rows after crop emergence or transplanting. See label for timing. Shallow
cultivation, irrigation, or rainfall within 5 days needed for good weed control.
Do not use under mulches, row covers, or hot caps. Under conditions of unusually
cold or wet soil and air temperatures, crop stunting and injury may occur. Crop
injury can occur if seeding depth is too shallow.
Annual grasses and
broadleaf weeds
Yellow and purple nutsedge
and broadleaf
weeds
Annual grasses, some
small-seeded broadleaf
weeds
Broadleaf weeds and
yellow nutsedge
ethalfluralin, MOA 3
+
clomazone, MOA 13
halosulfuron-methyl,
MOA 2
(Profine 75, Sandea)
75 DG
pendimethalin, MOA 3
(Prowl H2
O) 3.8 AS
imazosulfuron, MOA 2
(League) 75% WDG
0.5 to 0.75 oz
Up to 2.1 pt
0.19 to 0.3
4 to 6.4 oz
2 to 6 pt
0.4 to 1.2
+
0.125 to 0.375
Apply to the soil surface immediately after seeding crop for preemergence control
of weeds. DO NOT APPLY PRIOR TO PLANTING CROP. DO NOT SOIL INCORPORATE.
May also be used as a banded treatment between rows after crop
emergence or transplanting. Do not apply over or under plastic mulch.
0.024 to 0.036 Apply after seeding or prior to transplanting crop. For transplanted crop, do
not transplant until 7 days after application. Rate can be increased to 1 ounce
of product per acre to middles between rows. Do not apply within 57 days of
harvest.
Up to 1
Row middles only. May be applied sequentially in bareground and plasticulture
production systems at a minimum of 21 days apart. Refer to label for specific
instructions.
Row middles only. Use a shielded sprayer directed to the row middles to reduce
drift to the crop. In plasticulture, prevent the spray from contacting the plastic.
Consult label for further instructions. PHI = 48 d.
Pounds Active
Ingredient
Per Acre
Precautions and Remarks
324
2021 Vegetable Crop Handbook for Southeastern United States

Southeastern U.S. Vegetable Crop Handbook - 2021

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