Midwest Vegetable Guide - 2022 - 143

Cucurbit Crops - Weeds
soil. The more quickly vines cover the soil surface, the better
they will suppress late-emerging weeds. In-row plant spacing
can be decreased to close canopy more quickly. Planting on
the square will allow cultivation in two directions. Cucurbits
can benefit from the soil warming properties of plastic mulch
in addition to the in-row weed control it provides. Materials
include landscape cloth/fabric, plastic, and biodegradeable
plastic. Straw mulch can delay early season growth by
suppressing soil temperatures. Weeds between beds and
along the edges of beds can be controlled with a combination
of cultivation, mowing, or hand hoeing/pulling. Weeds along
the edge of the mulches can be a particular challenge to avoid
ripping the mulch. Some fresh market plantings are often
small enough to accommodate some hand hoeing or pulling.
For larger plantings it may make more sense to mechanically
cultivate with tow-able tools between plastic rows or between
bare-soil rows.
Pesticide
Curbit EC (3) (ethalfluralin) PRE
Aim EC (2) (carfentrazone) POST
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | 0.5-2 fl. oz. per acre. Apply a minimum of 1
day prior to transplanting or 7 days prior to direct-seeding, or
apply between crop rows with hooded sprayer. Do not allow
spray to contact crop. 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 inches tall. Do not exceed
6.1 fl. oz. per acre per season REI: 12-hour. HRAC 14.
Chateau SW (51WDG) (flumioxazin) PRE
Cantaloupe/Muskmelon, Watermelon | 4 oz. per acre. For
cantaloupe, honeydew, and watermelon in Indiana only (IN
24c accessed through Indiana Vegetable Growers
Association): use a shielded or hooded sprayer to apply
before transplanting to row middles between plastic mulchcovered
raised beds. Bed must be at least 4 inches higher than
treated area and at least 24 inches wide. Spray must remain
between raised beds and contact no more than the bottom 1
inch of plastic. Do not apply after crops are transplanted.
Rainfall or irrigation over beds is required after application
but before transplanting. REI: 12-hour. HRAC 14.
clethodim products (clethodim) POST
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | Use 2EC formulations at 6-8 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
9-16 fl. oz. per acre with 1 qt. COC (1% v/v) or 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 lower rates for annual grasses,
the high rates for perennial grasses. Spray on actively
Dacthal Flowable (6F) (DCPA) PRE
Cantaloupe/Muskmelon, Watermelon | 6-14 pts. per acre.
Apply when plants have 4-5 true leaves and growing
conditions favor good plant growth. Crop injury may occur if
applied under unfavorable growing conditions or earlier than
recommended. REI: 12-hour. HRAC 03.
Dual Magnum (7.62EC) (s-metolachlor) PRE
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | Illinois, Indiana, Michigan, Minnesota, and
Ohio only. IL 24c exp. 03/25/24. MI 24c exp. 12/31/21. MN
24c exp. 12/31/25. OH 24c exp. 12/31/22. For
cantaloupes/muskmelon and watermelon: use 0.67-1.27
pts. per acre before transplanting or after seeding and before
crop emergence. For cucumbers: use 0.67-1.0 pt. per acre
after seeding before weeds or crop emerge, or broadcast after
cucumbers have 1-2 true leaves. For pumpkins and winter
squash: use 1.0-1.33 pts. per acre between rows after seeding
and before emergence, or after emergence leaving an
untreated area at least 6 inches from planted seed or pumpkin
leaves. Broadcast application over top of pumpkin rows after
seeding and before crop emergence permitted in all states
listed above except Ohio. For summer squash in all states
Midwest Veg Guide 2022
143
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | 3-4 pts. per acre. Use lower rates on coarse
soils. Direct-seeded crops: apply to soil surface within 2 days
after seeding. Do not incorporate. Transplants: apply as a
banded spray between rows. Does not control large-seeded
broadleaves. Needs 0.5 inch of water within 5 days of
application to be effective. If no rain occurs, cultivate
shallowly. Do not apply over or under hot caps, row covers,
or plastic mulch. Do not broadcast over top of plants. Under
cool temperatures may cause crop injury or failure. REI: 24hour.
HRAC 03.
growing grass. Wait at least 14 days between applications.
REI: 24-hour. PHI: 14-day. HRAC 01.
Command 3ME (clomazone) PRE
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | For cucumber: use 0.4-1.0 pt. per acre. For
cantaloupe/muskmelon and watermelon: use 0.4-0.67 pt.
per acre. For summer squash: use 0.67-1.33 pts. per acre.
For winter squash and processing pumpkins: use 0.67-2.0
pts. per acre. Not for jack-o-lantern pumpkins. See label for
sensitive varieties. Apply prior to seeding or transplanting, or
after seeding before crop emergence. Does not control
pigweed species. Rates below 1 pt. will only suppress weeds.
May cause temporary bleaching of crop leaves. REI: 12-hour.
PHI: 30-day for cucumber; 30-day for summer squash; 45day
for winter squash and processing pumpkins. HRAC 13.
Midwest Vegetable Guide - 2022

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