Midwest Vegetable Guide - 2022 - 289

Sweet Potato - Weeds
Aim EC (2) (carfentrazone) POST
| 0.5-2 fl. oz. per
acre. Apply as a burndown application prior to transplanting
or apply with a hooded sprayer as a directed application
between crop rows. Add 1 qt. COC (1% v/v) or 0.5 pt. NIS
per 25 gal. of spray solution (0.25% v/v). Weeds must be
actively growing and less than 4 in. tall. Do not allow spray
to contact crop. Do not exceed 11.6 fl. oz. per acre per
season. REI: 12-hour. PHI: 7-day. HRAC 14.
clethodim products (clethodim) POST
| Use 2EC
formulations at 6-16 fl. oz. per acre with 1 qt. COC per 25
gals. of spray solution (1% v/v). Do not exceed 32 fl. oz. per
acre per season. Use Select Max at 9-32 fl. oz. per acre with
0.5 pt. NIS per 25 gals. of spray solution (0.25% v/v). Do not
exceed 64 fl. oz. per acre per season. Use low rates for annual
grasses and high rates for perennial grasses. Spray on actively
growing grass. Wait at least 14 days between applications.
REI: 24-hour. PHI: 30-day. HRAC 01.
Command 3ME (clomazone) PRE
| 1.4-4.0 pt. per
acre. Use a lower rate on coarse textured soils. Apply in a
single application immediately after transplanting and before
weeds emerge. When used alone, may not adequately control
pigweed species and does not control carpetweed. REI: 12hour.
PHI: 95-day for rates up to 3.3 pt. per acre, 125-day for
rates over 3.3 pt. per acre. HRAC 13.
Dacthal Flowable (6F) (DCPA) PRE
| 6-14 pts.
per acre. Apply at transplanting or at layby up to 6 weeks
after transplanting. May be applied over the top of
transplants. REI: 12-hour. HRAC 03.
Devrinol DF-XT (50) (napropamide) PRE
| 2-4
lbs. per acre. Apply immediately after transplanting. If rain
does not occur within 24 hours, incorporate shallowly or
irrigate with 0.5 inch of water. REI: 24-hour. HRAC NC.
Dual Magnum (7.62EC) (s-metolachlor) PRE
|
1.0-1.3 pts. per acre. Illinois, Indiana, Michigan, Minnesota,
and Missouri only. IL 24c exp. 03/25/24. MI 24c exp.
12/31/21. MN 24c exp. 12/31/25. MO 24c exp. 07/22/26.
Apply after transplanting but before weeds emerge. Do not
incorporate into soil. Close transplant trenches before
application. Dual Magnum applied shortly after transplanting
and followed by moderate to heavy rainfall or irrigation can
result in reduced yields and misshapen storage roots. Crop
safety is improved by 10-14 days after transplanting when
Dual Magnum can be used as a layby application prior to
canopy closure. REI: 24-hour. PHI: 60-day. HRAC 15.
Midwest Veg Guide 2022
289
Fusilade DX (2EC) (fluazifop-P) POST
| 10-12 fl. oz.
per acre. Add 1 qt. COC (1% v/v) or 0.5 pt. of NIS per 25
gals of spray solution (0.25% v/v). Apply to actively growing
grass. Do not exceed 4 applications or 48 fl. oz. per acre per
season. REI: 12-hour. PHI: 14-day. HRAC 01.
glyphosate products (glyphosate) POST
| 0.753.75
lbs. acid equivalent (ae) per acre. Use formulations of 3
lbs. ae per gal. (4 lbs. isopropylamine salt per gal.) at 1-5 qts.
per acre or formulations containing 4.5 lbs. ae per gal. (5 lbs.
potassium salt per gal.) at 0.66-3.3 qts. per acre. Broadcast
before planting, or apply between crop rows with wipers or
hooded or shielded sprayers. Use low rate for annuals and
higher rates for perennials. REI: 4-hour to 12-hour. PHI: 14day
for foliar applications directed between rows, 7-day for
wiper applications. HRAC 9.
paraquat products (paraquat) POST
| 1-2 pt of 2
lb. per gal. formulation. Add 1 qt. COC (1% v/v) or 0.5 pt.
NIS (0.25% v/v) per 25 gal. of solution and apply to emerged
weeds less than 6 " tall prior to transplanting. Certified
applicators must successfully complete an EPA-approved
training program before mixing, loading, and/or applying
paraquat. REI: 12 to 24-hour. HRAC 22. RUP.
Valor SX (51WDG) (flumioxazin) PRE
| 2-3 oz. per
acre. Apply to prepared planting beds prior to transplanting.
Do not use on greenhouse-grown transplants, or on
transplants harvested more than 2 days before transplanting.
Do not use on varieties other than Beauregard unless you
have tested for phytotoxicity under your conditions. Provides
suppression of many grass weeds. REI: 12-hour. HRAC 14.
Midwest Vegetable Guide - 2022

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