Table 10.4. Herbicides approved for managing weeds in okra. (continued)
Labels change frequently. Be sure to read a current product label before applying any chemical.
Active ingredient Trade name MOA
lb. a.i./A product/A code Weeds controlled / remarks
Prometryn (Caparol) 4 L 5 Apply after planting, but before crop emergence. Apply as one PRE application at 3 pt. Or 1 PRE application
0.75 - 1.5 1.5 - 3.0 pt. at 1.5 pt. followed by one POST-directed application at 1.5 pt. Do not exceed 3 pt./A per crop cycle.
Sulfentrazone (Willowwood
sulfentrazone) 4SC
14 Broadleaf and grass weed control, Nutsedge suppression. Do not apply on sands with less than 1% organic
suitable rate for the soil type in your area.
0.07 - 0.09
3 Annual broadleaf and grass weeds. Incorporate 4 in. or less within 8 hr. Results in Florida are erratic on soils
with low organic matter and clay contents. Note precautions against planting non-registered crops within 5
months.
0.5 - 0.75 0.5 - 1.5 pt.
5.0 - 7.5 lb.
*** POSTEMERGENCE ***
Carfentrazone (Aim) 1.9 EW 14 Emerged broadleaf weeds. Apply to row middles only with a hooded sprayer. Maximum rate of 0.096 lb.
a.i./ A per season. Rates apply to mineral and muck soils. Use crop oil concentrate or nonionic surfactant at
recommended rates. PHI 0 days.
up to 0.031
(Aim) 2 EC
Glyphosate (various formulations) 9 Emerged broadleaf and grass weeds. Apply to row middles only with a hooded sprayer. PHI 14 days.
consult labels
Halosulfuron (Sandea) 75 WG 2 Broadleaf and purple/yellow nutsedge weeds. Apply to row middles of direct-seeded or transplanted okra.
If plastic is used, prevent herbicide contact with the plastic. Do not apply more than 2 oz./A per 12-month
period. PHI 30 days.
0.024 - 0.05 0.5 - 1.0 oz.
Lactofen (Cobra) 2 EC 14 Broadleaf weeds. Apply to row middles only with a shielded or hooded sprayer. A minimum of 24 f. oz./A is
required for residual control. Add a crop oil concentrate or nonionic surfactant for control of emerged weeds.
One POST application may be made per growing season at 18 days after transplanting. Cobra contacting
green foliage or fruit can cause excessive injury. Registration is through Third Party Registration, Inc. and a
copy of the label must be on hand at time of application. PHI 30 days.
0.25 - 0.5
Mesotrione (Callisto) 4 L 28 Broadleaf and grass weeds. Direct spray with hooded sprayer to minimize contact with okra plants. Okra
must be at least 3 in. tall. Use of a nonionic surfactant is required. Injury risk is greatest on coarse textured
soils. Apply as one preemergence or one postemergence application. PHI 28 days.
0.09
Paraquat (Gramoxone) 2 SL 22 Emerged broadleaf and grass weeds. Apply to row middles only and do not allow contact to okra plants. Limit
of 2 applications after crop emergence. Do not exceed 8 pt./A preseason. PHI 60 days. Consult label for new
restrictions.
0.5 - 1.0 2.0 pt.
Pelargonic acid (Scythe) 4.2 EC 27 Broadleaf and grass weeds. Apply to row middles only with a shielded sprayer.
3 - 10% v/v
Prometryn (Caparol) 4 L 5 Apply 1 postemergence application directed to the base of the crop. If a PRE application was made do not
0.75 1.5 pt. exceed 3 pt./A. PHI 14 days.
Sethoxydim (Poast) 1.5 EC 1
0.19 - 0.28 1.0 - 1.5 pt. methylated seed oil in the spray. PHI 14 days.
2019 Vegetable Production Handbook of Florida 147