Vegetable Production Guide

Cole Crops
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Table 1 Cole Crops Weed Control

This section was updated - 26 June 2021

Table 1 Cole Crops (Broccoli, Brussels sprouts, cabbage, cauliflower) Weed Control

 

Product

Rate

PHI*

Comments

Pre-plant Incorporation

Bonanza 480


(trifluralin)

Group 3

1.25 to 2.3 L/ha
(500 to 900mL/acre)

Apply in a minimum of 100 L/ha (40 L/acre) of water at 275 kPa
N/A
  • REGISTERED ON DIRECT-SEEDED CABBAGE OR CAULIFLOWER, OR TRANSPLANTS OF CABBAGE, CAULIFLOWER, BROCCOLI AND BRUSSELS SPROUTS.

  • Rates vary with soil types see label for details.
  • Some stunting or reduced stands may occur to direct-seeded crops.
  • Apply treatment from 3 weeks before planting and incorporate thoroughly within 24 hours to 8 to 10 cm deep.
  • Controls seedling grasses and some broadleaved weeds.
  • Lady’s-thumb, nightshades, groundsel, hairy galinsoga, cudweed, shepherd’s-purse and mustards are not controlled.
  • Use the lowest rate on sandy soil, the higher rate on heavier soils.
  • Effectiveness is reduced on cold, wet soils or on mineral soils with less than 2% or greater than 15% organic matter.
  • Applications at high rates late in the season may carry-over and damage following crops of corn, grass or grain.
  • If manure is spread prior to application ensure it has been thoroughly mixed into soil with at least 2 tillage operations prior to application.
  • Do not enter treated area for 12 hours.

Devrinol 50-DF


(napropamide)

Group 15

2.25 to 4.5 kg/ha
(0.9 to 1.8 kg/acre)
60
  • Apply in 200 to 900 L/ha (80 to 365 L/acre) of water.
  • Apply once per year.
  • Apply before planting and incorporate as for trifluralin above.
  • Will control many seedling broadleaf and grassy weeds, but not shepherd’s-purse or lady’s-thumb.
  • Use the lower rate on light soils (sands and sandy-loams).
  • Do not apply to soils with over 10% organic matter.
  • Use at the high label rates may result in temporary crop stunting, but crops will outgrow injury and yield is unaffected.
  • Observe a 12 month plant back interval for crops not found on the label.
  • Do not enter treated area for 12 hours.

Devrinol 2-XT


(napropamide)

Group 15

4.69 to 9.38 L/ha
(1.90 to 3.80 L/acre)

Goal 2XL


(oxyfluorfen)

Group 14

Coarse-textured soil (<1% O.M.):
1.13 L/ha (460 mL/acre)

Medium to fine textured soils (>1% O.M.): 

2.0 L/ha (810 mL/acre)

Apply in 200 L/ha (80 L/acre) of water

60
  • REGISTERED ON TRANSPLANTED CABBAGE, CAULIFLOWER AND BROCCOLI.
  • NOT REGISTERED ON BRUSSELS SPROUTS.
  • Do not apply to direct-seeded crops.
  • Pre-emergence control of  redroot pigweed and common purslane.
  • Pre-emergence suppression only of lady's thumb and Eastern nightshade.
  • Do not apply more than once per year.
  • Do not apply to sandy soil.
  • Use on muck soils may result in partial control or suppression of listed weeds.
  • Apply after completion of soil preparation but prior to transplanting.
  • Transplanting should be completed with minimal soil disturbance.
  • Leave treated surfaces undisturbed after transplanting during the time period for which weed control is desired.
  • Timely cultivation after weed emergence will assist in weed control. 
  • Can cause temporary leaf cupping or crinkling.  Severity of crop response can be enhanced if crop leaves come in direct contact with treated soil.  Avoid using young, extremely succulent transplants in containers less than 2.5 cm2 in size.  Check label for more detail.
  • Do not apply if an acetanide herbicide such as Dual II Magnum has been applied during the current growing season.
  • Do not apply post-transplant or post-emergence (over the top) of crop.
  • Do not enter treated area for 12 hours.

Early Pre-Plant (Spring Application)

Authority 480

(sulfentrazone)

Group 14 

0.292 L/ha (0.118 L/acre)

Apply in 100 L/ha (40 L/acre) of water at 175 kPa

N/A
  • Apply as a broadcast or banded treatment to the harvested crop stubble in the spring up to 72 hours prior to transplanting.
  • When applied as a banded treatment, see label to calculate rate and volume, and apply only once per year.
  • Authority 480 requires adequate rainfall or irrigation to activate.
  • Do not mechanically incorporate after application.
  • Do not use on coarse-textured soils classified as sand that have less than 1% organic matter.
  • Do not use on fine-textured soils with less than 1.5% organic matter.
  • Do not apply on soils with an organic matter content greater than 6%.
  • Do not use on soils with a pH of 7.8 or greater.
  • Do not apply
  • Do not enter treated area for 12 hours.
  • Observe a plantback interval of 24 months for sweet corn and 16 months for winter wheat.
  • Controls redroot pigweed, lamb's quarters, Eastern black nightshade and common groundsel.

Pre-emergence

Prowl H2O


(pendimethalin)

Group 3

Mineral soils:
2.46 L/ha
(1 L/acre)
 
Apply in 200 L/ha (80 L/acre) of water at 138 to 276 kPa
Broccoli:
60

Cabbage & Cauli:
70
  • Do not use on muck soils.
  • Controls green foxtail and redroot pigweed.
  • Suppression only for lamb's-quarters.
  • Destroy existing weeds before applying.
  • Apply at the 2 to 4 leaf stage for both direct-seeded and transplanted crops.
  • Be sure roots of transplants are established before application.
  • Apply as a directed spray to the soil surface between vegetable rows prior to emergence of crop and weeds.
  • Avoid direct spray with foliage or stems of crop.
  • Rain or irrigation within 7 days of application improves control.
  • Do not apply more than once per season.
  • Do not apply more than once in 2 consecutive years.
  • Do not tank mix with Chateau.
  • In the event of a crop failure after application, corn and snap beans may be reseeded the same year.  See label for planting directions.
  • Field corn and dry bulb onions can be grown as rotational crops the year following treatment.
  • Do not plant fall seeded crops such as winter wheat, winter barley, winter rapeseed on land treated the previous spring.
  • Do not enter treated area for 24 hours.

Devrinol 50-DF


(napropamide)

Group 15
2.25 to 4.5 kg/ha
(0.9 to 1.8 kg/acre)
60
  • Apply in 200 to 900 L/ha (80 to 365 L/acre) of water
  • Apply only once per year.
  • Apply to a clean, moist field after seeding or transplanting, but before weed emergence.
  • On dry soils, light rain or irrigation within 2 days is essential.
  • Will control many seedling broadleaf and grassy weeds, but not shepherd’s-purse or lady’s-thumb.
  • Use the lower rate on light soils, sands and sandy-loams).
  • Do not apply to soils with over 10% organic matter.
  • Use at the high label rates may result in temporary crop stunting, but crops will outgrow injury and yield is unaffected.
  • Observe a 12 month plant back interval for crops not found on the label.
  • Do not enter treated area for 12 hours.

Devrinol 2-XT


(napropamide)

Group 15

4.69 to 9.38 L/ha
(1.90 to 3.80 L/acre)

Dual II Magnum


(s-metolachlor)

Group 15
1.25 to 1.75 L/ha
(500 to 700 mL/acre)

Apply in 300 L/ha (120 L/acre) of water
N/A
  • REGISTERED ON TRANSPLANTED CABBAGE, CAULIFLOWER, AND BROCCOLI ONLY.

  • Controls annual grasses and nightshade, and to suppress pigweed.
  • Cannot be used on seeded cole crops.
  • Apply within 2 days of transplanting.
  • Do not incorporate.
  • Do not apply to soils with less than 1% or more than 10% organic matter.
  • Do not make more than 1 application per year.
  • Do not tank mix with fluid fertilizers, oils, oil concentrates or surfactants.
  • Rain is required within 10 days of application, or a shallow cultivation.
  • Only one application per year is permitted.
  • Do not enter treated area for 12 hours.

Frontier Max


(dimethenamid -P)

Group 15

756 to 963 mL/ha
(306 to 390 mL/acre)

Apply using 200 to 300 kPa spray pressure.

60
  • REGISTERED ON TRANSPLANTED CABBAGE ONLY.
  • Apply as a soil application prior to transplanting and before weeds emerge.
  • Controls annual grass weeds and certain broadleaf weeds.
  • Use high rate to control redroot pigweed, eastern black nightshade and yellow nutsedge.
  • Apply no more than once per season.
  • On mineral soils, observe a plantback interval of 11 months for all crops not listed on label.
  • On muck soils, observe a plantback interval of 11 months for carrots, transplanted celery and onions.  See label precaution for other crops on muck soils.

Chateau


(flumioxazin)

Group 14
Coarse and medium-textured soilswith <5% organic matter:  210 g/ha
(85 g/acre)
N/A
  • Registered on tranplanted broccoli only.
  • Controls redroot pigweed, green pigweed, common ragweed, lamb’s quarter, nightshade and dandelion.
  • Suppression only of green foxtail.
  • Apply to with hooded or shielded equipment to row middles prior to transplanting.
  • Do not apply after transplanting
  • Apply ½ cm of water prior to transplanting if rainfall does not occur between application and transplanting in order to activate Chateau.
  • Control will be reduced if there is mechanical incorporation into soil or if emerged weeds are cultivated.
  • Crop should be grown on raised beds or plastic mulched beds that are 10 cm higher than the treated middle row. Mulched beds must be at least 60 cm wide.
  • The spray must remain between the raised beds with minimal contact with plastic mulch.
  • The spray must contact no more than the bottom 2.5 cm of the raised bed.
  • Do not apply to soils with >5% organic matter or fine-textured mineral soils.
  • Do not apply more that 210 g/ha (85 g/acre) in a season.

Post-emergence

Venture L


(fluazifop-P-butyl)

Group 1
Barnyard Grass (2–5 leaf):
0.8 L/ha (320 mL/acre)

Proso Millet (2–5 leaf):
1.0 L/ha (400 mL/acre)

Foxtails (2–4 leaf):
1.4 L/ha (565 mL/acre)

Quackgrass (3–5 leaf):
2.0 L/ha (0.8 L/acre)
40
  • Annual bluegrass is resistant.
  • Apply in 50 to 200 L water/ha (20 to 80 L water/acre) at 200 to 300 kPa.
  • Do not make more than 1 application per season.
  • Warning: Women capable of bearing children should avoid exposure to Venture.

Aim EC

(carfentrazone-ethyl)

Group 14

37 to 117 mL/ha
(15 to 47 mL/acre)

Apply in 100 L/ha (40 L/acre) of water

1

  • Controls annual weeds.
  • Must be applied using hooded sprayers to weeds between the rows of the emerged crop.
  •  Use an adjuvant such as Agral 90 or Agral-Surf at 0.25% v/v (0.25 L/100 L of spray solution) or Merge at 1% v/v (1 L/100 L of spray solution).
  • PRECAUTION:  crop injury will occur when spray drift is allowed to come in contact with green stem tissue or leaves.
  • Apply only once per growing season.

Poast Ultra plus Merge at the following rates:

70
  • The maximum rate on broccoli is 450 mL/ha (182 mL/acre).
  • Do not make more than one application per season on Brussesl sprouts.
  • Apply when annual weeds are in the 1 to 6 leaf stage and when quackgrass is in the 1–3 leaf stage.
  • Annual bluegrass is not controlled.
  • Pressure varies with water volume see label for detail.
  • Group 1 herbicide.
  • Do not enter treated area for 12 hours.
  • There is a 30 day plant back restriction on crops not found on the label.
 

Poast Ultra

Merge

Annual grasses
(incl volunteer cereals)
320 mL/ha
(130 mL/ac)
0.5-1.0 L/ha
(0.2-0.4 L/ac)
Annual grasses
& quackgrass suppression
470 mL/ha
(190 mL/ac)
0.5-1.0 L/ha
(0.2-0.4 L/ac)
Quackgrass 1.1L/ha
(445 mL/ac)
1.0–2.0 L/ha
(0.4-0.8 L/ac)

Excel Super


(fenoxaprop-p-ethyl)

Group 1
670 mL/ha
(270 mL/acre)

Apply in at least 110 L/ha (45 L/acre) of water at 275 kPa
Broccoli:
44

Cabbage:
35

Cauliflower:
43
  • DO NOT USE ON BRUSSELS SPROUTS.
  • Apply between the 1 to 6 leaf stage of weedy grasses.
  • Controls foxtails, barnyard grass, crabgrass, fall panicum, proso millet and old witch grass.
  • Does not control quackgrass, sedges or perennial grasses.
  • Do not apply any other pesticides or chemicals 4 days before or after applying Excel Super.
*PHI = Pre-harvest interval
BUFFERS – Refer to product label for buffer requirements. See also Pesticide Regulations and Safety section of this guide.
PESTICIDE GROUP DETAILS – see Pesticide Toxicity Table of this guide.

 

Viewing Section 14 of 16