Midwest Vegetable Guide - 2022 - 265

Root Crops - Weeds
spring and thoroughly cover to limit attractiveness of rotting
vegetation to the first generation of flies to lay eggs on.
Pesticide
Non-Pesticide
Diazinon AG500 (4ES) (diazinon) Rutabaga | Use 50W
formulations at 4-6 lbs. per acre as a pre-plant incorporation
and do not exceed 6 lbs. per acre per season. Use AG500
formulations at 2-4 lbs. per acre as a pre-plant incorporation
and do not exceed 4 lbs. per acre per season. Use AG600
formulations at 51-102 fl. oz. per acre as a pre-plant
incorporation and do not exceed 102 fl. oz. per acre per
season. REI: 2 to 4-day. PHI: 14-day. IRAC 01B. RUP.
Mustang Maxx (0.8) (zeta-cypermethrin) Beet, Carrot,
Celeriac, Horseradish, Parsnip, Radish, Rutabaga, Turnip |
3.2-4.0 fl. oz. per acre. Do not exceed 24 fl. oz. per acre per
season. Apply weekly, broadcast applications starting at fly
emergence and continuing through the activity period,
typically 6 applications. Allow 4 days between applications.
Leaves can not be used for food or feed. REI: 12-hour. PHI:
1-day. IRAC 03A. RUP.
Root Crops - Weeds
Reviewed by Stephen Meyers, Ben Phillips - Sept 2021
Recommended Controls
All Weeds
Herbicide are not widely labeled across the many root crops.
Instead, herbicides are labeled based on the root crop plant
families. For example, beets have several herbicides that can
be applied over the top of the crop that would damage any
other root crop.
Prepare a stale seedbed several weeks in advance of planting,
allow weeds to emerge, and kill weeds without bringing new
weed seeds to the surface with a burndown herbicide, flame
weeder, or very shallow cultivation. In fields with lower
weed pressure, it may be possible to plant into some emerged
weeds, and then use an approved burndown herbicide prior to
crop emergence to control emerged weeds. For crops like
carrots and parsnips that take a long time to emerge, a
burndown application made just prior to crop emergence is
especially useful, but it can also pay off for faster-emerging
species like radishes or beets.
For specific weeds controlled by each herbicide, check the
Relative Effectiveness of Herbicides for Vegetable Crops
table.
Beet, Carrot, Celeriac, Horseradish, Parsnip, Radish,
Rutabaga, Turnip | Weed control in root crops often relies
heavily on cultivation and hand-weeding for full season weed
control. These operations are most efficient when planting
arrangement is designed with weed control in mind and is
designed to work with available weed control equipment.
Specialized weeding equipment for root crops includes basket
weeders, narrow-bladed hoes, finger weeders, and others.
Prepare a stale seedbed with flaming or very shallow
cultivation, instead of herbicides.
Pesticide
Aim EC (2) (carfentrazone) POST
Rates provided in the recommendations below are given for
overall coverage. For a banded treatment, reduce amounts
according to the portion of acre treated.
Beet, Carrot,
Celeriac, Horseradish, Parsnip, Radish, Rutabaga, Turnip |
0.5-2.0 fl. oz. per acre. Apply with hooded sprayers as a
directed application between crop rows. Use COC or NIS.
Weeds must be actively growing and less than 4 inches tall.
Do not allow spray to contact crop. Do not exceed 6.1 fl. oz.
per acre per season. REI: 12-hour. HRAC 14.
Caparol 4L (prometryn) POST PRE
Carrot,
Celeriac | Use lower rates on sandy soils. For carrot: Apply
2-4 pts. per acre preemergence and/or postemergence through
the 6-leaf stage of carrot development. Do not exceed 8 pts.
per acre per year. For transplanted celeriac: Make a single
application of 1.6-4 pts. per acre after crop the crop has 6-8
leaves. REI: 12-hour. PHI: 30-day for carrot, 60-day for
celeriac. HRAC 05.
clethodim products (clethodim) POST
Beet, Carrot,
Celeriac, Horseradish, Parsnip, Radish, Rutabaga, Turnip |
Use 2EC formulations at 6-8 fl. oz. per acre with 1 qt. of
COC per 25 gals. of spray solution (1% v/v). Use Select Max
at 9-16 fl. oz. per acre with 8 fl. oz. of NIS per 25 gals. of
spray solution (0.25% v/v). Spray on actively growing grass.
Use lower rates for annual grasses, the higher rates for
perennial grasses. Spray on actively growing grass. Wait at
least 14 days between applications. Do not exceed 32 fl. oz.
of 2EC formulations or 64 fl. oz. of Select Max per acre per
season. REI: 24-hour. PHI: 15-day for radish, 30-day for
beet, carrot, celeriac, horseradish, parsnip, rutabaga, and
turnip. HRAC 01.
Midwest Veg Guide 2022
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Midwest Vegetable Guide - 2022

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