Midwest Vegetable Guide - 2022 - 216

Okra - Horticulture
Spartan 4F (sulfentrazone) PRE
| New plantings: 3.3- Okra - Horticulture
9.0 fl. oz. per acre. Established plantings: 4.5-12.0 fl. oz. per
acre. New plantings: Apply after planting before weeds and
mint emerge. Established plantings: Apply to established
mint when it is dormant, in the fall after postharvest
cultivation, and/or in the spring after cultivation. Renovation
applications: Up to 8 fl. oz. per acre can be applied at
dormancy followed by up to 4 fl. oz. per acre 1-3 days after
the first harvest. Dormant and postharvest applications must
be at least 100 days apart. Use lower rates on coarse soils
with low organic matter. Rainfall or irrigation is required to
move herbicide into the soil. Application may injure crop as
mint emerges. Application to emerged mint will result in
severe injury. Do not exceed 12 fl. oz. per 12-month period.
Do not apply to mint grown on sands with less than 1%
organic matter. REI: 12-hour. PHI: 92-day for dormant and
new planting applicatons, 55-day for renovation applications.
HRAC 14.
Stinger (3) (clopyralid) POST
| 0.33-1.0 pt. per acre.
Use 4 fl. oz. of NIS per 25 gals. of spray solution. Apply up
to 0.5 pt. in spring or up to 1 pt. in fall. Controls mainly
composites and nightshade. To control Canada thistle in
spring, apply before bud stage. Do not use mint straw, hay, or
spent hay for compost or mulch and do not dispose of on land
to be rotated to broadleaf crops due to herbicide remaining in
mint hay or straw that will injure broadleaf plants. Do not
exceed 1 pt. per acre per growing season. REI: 12-hour. PHI:
45-day. HRAC 04.
Thistrol (2L) (MCPB) POST
| 1-2 pts. per acre. Apply
in spring after mint emerges to suppress broadleaf weeds, or
apply in fall to control winter annuals. May injure mint. Oil
yields may be reduced if mint is more than 6 inches tall at the
time of application. Bindweed suppression is best with spring
application when weeds are 6-8 inches long. REI: 24-hour.
PHI: 40-day. HRAC 04.
trifluralin products (trifluralin) PRE
| Apply 1.01.5
pt. per acre of 4 lb. per gal. trifluralin to established,
dormant or semi-dormant mint, late winter to spring or in the
fall after harvest prior to emergence of targeted weed species.
Must be incorporated mechanically or by 0.5 in. rainfall or
irrigation within 3 days of application. REI: 12-hour. HRAC
03.
Major update by Ben Phillips, Liz Maynard - Oct 2020
Reviewed by Liz Maynard - Aug 2021
Crop Description
Okra (Abelmoschus esculentus) is a subtropical plant related
to hibiscus that is grown for its young green fruit. Okra
requires warm weather for best growth. Some varieties have
many small spines, similar to vine crops, which can irritate
the skin when harvesting. There are also spineless varieties
and red-fruiting varieties. Though okra is often listed on
pesticide labels along with eggplants, peppers, and tomatoes,
they are not a related species and share few pests.
Planting and Spacing
Seed 12 to 18 inches apart in rows 36 inches apart. Seed only
after the soil has warmed to 65° F to 70° F for several days.
Black plastic mulch with drip irrigation will increase yields.
Transplants can be used for early production.
Fertilizing
pH: Maintain a soil pH of 6.0 to 6.5. Okra is very sensitive to
low pH soils.
Before planting, apply 40 pounds N per acre, 0 to 200 pounds
P2O5 per acre, and 0 to 300 pounds K2O per acre based on
soil test results and recommendations from your state.
Sidedress with 40 pounds N per acre after the first harvest.
Harvesting
Okra should be harvested every 2 to 3 days to maintain
optimal market size (2- to 4-inch long pods). Frequent
harvesting increases overall yield since the plant will reset
pods faster. Okra will yield 8,000 to 10,000 pounds per acre.
Time from transplanting to harvest ranges between 50 to 65
days.
216
Midwest Veg Guide 2022
Midwest Vegetable Guide - 2022

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