Vegetable Production Guide

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Table 1 Celery Weed Control

This section was updated - 15 June 2021

Table 1 Celery Weed Control







Gesagard 480SC


Group 5
3.75 to 4.58 L/ha
(1.5 - 1.85 L/acre)

Apply in 200 to 1000 L/ha (80 to 405 L/acre) of water at 200 to 300 kPa
  • Controls annual broadleaved weeds and annual grasses.
  • Apply 21 days after transplanting (when plants are established) but before weeds are 5 cm high.
  • Make only one application per season.
  • Replant treated areas with only those crops found on the label, if planting in the same season.
  • For best results use on moist soils.
  • Do not enter treated area for 24 hours.

Lorox L


Group 7
1.9 to 4.7 L/ha
(0.75 to 19. L/acre)

Apply in 220 to 440L/ha (90 to 175 L/acre) of water.
  • Use the lower rate on lighter soils (lower in clay or organic matter) and the higher rate on heavier soils.
  • Apply to transplants as soon as new growth has started.
  • Some temporary discoloration may occur.
  • Controls annual grasses and broadleaf weeds.
  • Will not control atrazine resistant weeds.
  • Do not use on coarse-textured soils low in organic matter.

Guardsman/ Agricultural Weedkiller No. 1

(mineral spirits)
Seed beds:
6L per 100 m2
  • Apply after celery has emerged.
  • Ventilation is essential following application in seedbeds.
Whole field:
600 to 800 L/ha
(243 to 324 L/acre)

Rows only:
300 to 400 L/ha
(120 to 160 L/acre)
  • Apply before the hearts form or the plants reach 15 cm height. Usually within 2 to 3 weeks of transplanting.
  • Controls redroot pigweed, lamb’s quarter, purslane and annual grasses.
  • Pineappleweed and wormseed mustard are not controlled consistently.
  • Apply during a cool, sunny morning when leaves are dry; do not apply during strong winds, the heat of the day, a rain, or immediately before or after a frost.
  • Follow label recommendations closely since celery is easily damaged during any stage.
  • Crop damage may result if sprays are applied in hot, dry weather, or when plants are wet with rain or dew.
  • Note: Other solvents may cause crop damage.

Aim EC


Group 14

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

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



Poast Ultra




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)
  • Do not make more than one application per season.
  • 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.


*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.


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