Table 7.9. Herbicides approved for managing weeds in cucurbit crops. (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 Crops Weeds controlled / remarks
*** PREEMERGENCE ***
Bensulide (Prefar) 4 E 8 All cucurbits Annual broadleaf and grass control. Incorporate or irrigate 1 to 2 in. within
36 hr. of application. Nonlabeled crops should not be planted within 120
days of application.
5.0 - 6.0 5 - 6 qt.
Carfentrazone (Aim) 1.9 EW 14 All cucurbits Apply as a preplant burn down for emerged broadleaf weeds. Use crop oil
concentrate, methylated seed oil, or nonionic surfactant at recommended
rates. Maximum rate of 0.096 lb. a.i./A per season. No pretransplant
interval.
up to 0.031
(Aim) 2.0 EC
Clomazone (Command) 3 ME 13 Cucumber Annual broadleaf and grass weeds. Use lower rates on coarse soils.
0.15 - 0.38 0.4 - 1 pt. Read label for additional restrictions.
Clomazone (Command) 3 ME 13 Muskmelon, watermelon Annual broadleaf and grass control. Use lower rates in coarse soils.
0.15 - 0.25 0.4 - 0.67 pt. Read label for additional restrictions.
Clomazone (Command) 3 ME 13 Summer squash Annual broadleaf and grass weeds. Broadcast for bareground production;
0.25 - 0.5 0.67 - 1.33 pt. row middles only if growing on plastic.
Clomazone (Command) 3 ME 13 Winter squash Annual broadleaf and grass weeds. Broadcast for bareground production;
0.25 - 0.75 0.67 - 2 pt. row middles only if growing on plastic. Read labels for cultivar restrictions.
(Strategy) 3 + 13 Cucumbers, melons,
Clomazone
summer & winter squash,
pumpkin, watermelon
Annual broadleaf and grass control. Must be applied no later than 2 days
after seeding. Overhead irrigation or rainfall of 0.5 in. within 5 days. Do
not apply under row mulch or over top of plants.
2 - 3 pt.
0.13 - 0.19
Flumioxazin (Chateau) 51 WDG 14 Cucumber, muskmelon,
watermelon, pumpkins,
summer & winter squash
Broadleaf control. Row middles only. Do not apply after crops are
transplanted/ seeded. Label is a Third-Party Registration (TPR, Inc.). Use
without a signed authorization and waiver of liability is a misuse of the
product.
up to 0.125 up to 4 oz.
Glyphosate (various formulations) 9 All cucurbits Controls emerged broadleaf and grass weeds. Consult individual labels
consult labels for restrictions.
Halosulfuron (Sandea) 75 DG 2 Cantaloupe, cucumber,
0.024 0.5 oz. crenshaw, honeydew
ground equipment in a minimum of 15 gal. of water/A
Yellow and purple nutsedge and broadleaf control. Apply uniformly with
Halosulfuron (Sandea) 75 DG 2 Watermelon Yellow and purple nutsedge and broadleaf control. May be applied
preemergence to seeded watermelon on bareground or pre-seeding to
mulch-cultured watermelon. Transplanting should be no sooner than 7
days after application. Use lighter rates on sandy soils with low organic
matter.
0.024 - 0.036 0.5 - 0.75 oz.
Halosulfuron (Sandea) 75 DG 2 Pumpkin, winter squash Yellow and purple nutsedge and broadleaf control. Apply before soil
cracking or pre-transplant. Transplanting should not be made sooner than
7 days after application. May be applied POST over-the-top when plants
0.024 - 0.036 0.5 - 0.75 oz.
Paraquat (Gramoxone) 2 SL 22 Cucumber, muskmelon,
cantaloupe, pumpkin,
squash, watermelon
Controls emerged weeds. Apply prior, during, or after planting, but before
crop emergence. Use a non-ionic surfactant. Consult label for new
restrictions.
0.63 - 0.94 2 - 4 pt.
(Firestorm) 3 SL
1.3 - 2.7 pt.
Pelargonic acid (Scythe) 4.2 EC 27 All cucurbits Controls emerged weeds. Apply before emergence of crop. Product is a
contact, nonselective, foliar applied herbicide. There is no residual activity.
3 - 10% v/v May be tank mixed with soil residual herbicides.
Pendimethalin (Prowl H20) 3 Cantaloupe, citron melon,
muskmelon, watermelon
Annual broadleaf and grass weeds. Apply to the row middles only. May
be applied as a sequential application with 2.1 pt./A before and 2.1 pt./A
after transplanting or seeding with 21 days between applications. Do not
exceed 4.2 pt./A per season.
1 2.1 pt.
S-metolachlor (Brawl, Dual Magnum) 15 Pumpkin Annual broadleaf and grass weeds and nutsedge control. Apply as interrow
or inter-hill application. Leave a 1 ft. untreated area over the seeded
row (6 in. on either side of the row). Use lower rates on lighter soils.
Apply before weeds emerge.
0.95 - 1.26 1.0 - 1.33 pt.
*** POSTEMERGENCE ***
Carfentrazone (Aim) 1.9 EW 14 All cucurbits Emerged broadleaf control. Post-direct hooded application to row middles
for burndown of emerged broadleaf weeds. Use crop oil concentrate or
nonionic surfactant at recommended rates. PHI 0 days.
up to 0.031
(Aim) 2.0 EC
58 2019 Vegetable Production Handbook of Florida