Introduction

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plants are grown directly in the treated soil are best for detecting the potential for injury. These tests are not intended to be
used to shortcut restrictions on the label, but provide information on rotational crops where none is available.
Injury symptoms from other causes can resemble herbicide carryover injury (i.e. cold weather, flooding, drought, insects,
diseases, etc.). Consult with your local agronomist on potential causes before spending money on testing.
Herbicides that leave a soil residue and are of particular concern in Western Canada are found in the following chart.
Re-cropping Restrictions for Residual Herbicides:
Figures listed are the number of cropping seasons before each crop can be grown (“1” means that the crop can be grown
the year following application). For plant-back restrictions less than one season; the delay is indicated with a “d” for
number of days or with “mths” for the number of months. A blank space means that there are no recommendations given
on the product label and a field bioassay is recommended by many product manufacturers to determine if these crops
are safe to plant. A field bioassay is a strip of a test crop that covers an area of the field that is representative of the field
variation and should include an untreated area.
PRODUCT
Alfalfa
Barley
Canaryseed
Clearfield canola
Non-Clearfield canola
Fababeans
Field corn
2,4-D* 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Accent 10 10 10 10 10
10
4
mths mths mths mths mths
mths
1
mths
Altitude FX/FX2 1 1 1 1 1 1 2 1 1 1
Amitrol 240 1d 1 1d 1d 10d* 10d* 5d* 1
1
1 1 6d 1 1d 1d 1d
AAtrex, Primextra II Magnum 1* 1 1*
1*
Ares 1 1 1 2 1 1 2 1 1 2 2 1
Authority / Authority Charge 1 1 1 1 0 1 0 0 2 0 0 0 1 1 1
Avadex 0 0 0 0 0 1 1 1 0 0 1 0 2 1 1 1 0 0 0
Barricade, Predicade, Retain, Signal
FSU, TraxosTwo
2 1 2 1 1 2 2 2 1 1 1 1 1 1 2 1 2 2 1 1 1
Battalion 1 1 1
Command 360 ME 2 2 2 1 1 2 1 1 2 2 2 2 2 2 1 2 1 2 2 1
Curtail M, Prestige XC 2 1 2 1 1 2 1 2 1* 1 1 2 1 1 1 2 2 1 1 1
Dicamba* 1 1* 1* 1 1* 1 1 0* 0* 1
Dual II Magnum 1 1 1
10
Eclipse III, Clopyralid 1 1 1
mths*
1 1 1 1 1 1 1
Edge 0 2 0 0 0 0 0 2 0 0 2 0 0 1* 1*
Flextstar GT 10 10
10
10
mths mths
mths
mths
Florasulam/fluroxypyr + MCPA 1 1 1 1 1 1 1 1
Florasulam + glyphosate (prior to
Aug 1)
Flucarbazone, Everest GBX (Brown
soils)
1
Flucarbazone, Everest GBX (Dark
Brown soils)
1* 1* 1* 1* 1* 1 1
Flucarbazone, Everest GBX (Black
soils)
1* 1* 1* 1* †† 1* 1* 1 1
Flucarbazone, Everest GBX (Grey-
Wooded soils)
1* 1* 1* 1* 1
Focus 1 1 1
Valtera (Crop uses) 11
mths
Dry beans
Field Peas
Flax
Forage grasses
0d 1 1 1 0d 0d 0d 0d
11
mths
1
11 11
mths mths
1 1
9
mths
Lentils
Mustard †
Oats
Potatoes
Rye
Soybeans
0 1 1 1 1 1 1 1 0
Sunflowers
9
mths
Wheat (durum)
Wheat (spring)
1 0
Wheat (winter)
3
mths
16
mnth
4.5
mths
4
mths
4
mths
4
mths