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Safety - page 25 • First aid - page 33 • Resistance management - page 41
Herbicides
Weeds
Rate
Acres treated per 10 L container
poverty weed
Canada thistle
pasture sage,
perennial sow thistle
Russian knapweed
1.8
L/acre
5
leafy spurge
field bindweed
toadflax
3.6
L/acre
2.5
Application Information
With
:
Apply with ground sprayers, backpack sprayers or handgun. See label for application information for a
backpack sprayer.
Water volume
: 160 - 324
L/acre.
Application Tips
Tordon 22K used as a spot treatment in a crop. No spot treatment should exceed 1 acre, and the total area treated in
any 1 field in a year should not exceed 5% of the field. Tordon 22K is persistent. It will carry over in soil. Treated
soil should not be moved out of the treated area. Tordon 22K is very difficult to clean from sprayers. Use a different
sprayer for applying other materials to desirable plants or crops. Handguns equipped with proportioning devices and
reservoirs for Tordon 22K are useful in preventing sprayer contamination.
How it Works
Interferes with cell division, causing leaf cupping, stem distortion and eventual death of plant. Tordon 22K is
absorbed through leaves and roots.
Expected Results
Tordon 22K: Perennial weeds show distorted stems and cupped leaves, which turn yellow and then brown. Usually
native grass increases in abundance as a result of reduced competition.
Restrictions
Rainfall
:
Heavy rainfall shortly after application may cause poor results.
Grazing
:
Do not graze treated area by dairy animals within 6 weeks after treatment. Clippings from grass or crops
which have been treated with Tordon 22K should not be used for composting or mulching, nor should the manure
from animals grazing treated areas or fed treated forage be used around susceptible plants.
Re-cropping
:
Picloram may persist in the soil for a period of up to five years; therefore, it should not be used in
those areas where sensitive broadleaved crops such as sunflowers and potatoes are grown in the rotations. Where
wheat, oats or barley are the major crops in the rotations, the following cropping sequence is suggested to start the
year after treatment.
First year
Oats
Second year
Oats or barley
Third year
Oats or barley or wheat
Environmental Precautions
Hand-held or backpack sprayer and spot treatment DO NOT require a buffer zone from sensitive habitat, but efforts
should be made to minimize exposure to sensitive plants and open water or wetlands. Otherwise buffer zones are
1
metre for aquatic habitats and 120 metres for sensitive terrestrial habitats.
Tordon 22k is moderately toxic to fish. Do not apply to any water bodies or in areas where the runoff from treated
areas will reach fish-bearing waters. Do not contaminate water through spray drift, by cleaning of equipment or
disposal of wastes. Tordon 22K may cause damage to sensitive non-target vegetation. Do not apply to irrigation
ditches that contain or may contain water to be used for irrigation or domestic purposes.
Leaching
:
Picloram is highly mobile in the soil and will readily move with water. Do not apply to soils that are very
permeable (textures of sandy loam to sand) throughout the entire profile and which also have an underlying shallow
Tordon 22 K (cont’d)