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Safety - page 25 • First aid - page 33 • Resistance management - page 41
Herbicides
Herbicides:
Spring application - Post-plant incorporated (harrowed in after seeding)
Crop
Tank mixture
Soil texture
Light to medium
Heavy
Barley
Treflan or Bonanza or Rival
+ Avadex BW
Treflan or Bonanza or Rival EC: 0.49 L/acre
Avadex BW: 1.70 L/acre
Treflan or Bonanza: 0.69 L/acre
Rival EC : 0.65 L/acre
Avadex BW: 1.70 L/acre
Wheat
Treflan or Bonanza or Rival
EC+ Avadex BW
Treflan or Bonanza or Rival EC: 0.49 L/acre
Avadex BW: 1.40 L/acre
Treflan or Bonanza: 0.69 L/acre
Rival EC: 0.65 L/acre
Avadex BW: 1.40 L/acre
Incorporation
Summerfallow: Fall (Sept 1 - soil freeze up):
Granular formulations must be incorporated at least twice with the
implement operated in two different directions. The first incorporation should be in the same direction as application,
within 24 hours of application. Second at the right angle to the first and should be delayed a minimum of 3 - 5 days.
For best results, perform both incorporations in the fall followed by tillage (5 to 8 cm) in the spring prior to planting.
Summer (May to July):
The initial incorporation must be done within 24 hours of application. The second
incorporation (and subsequent incorporations) may be done whenever necessary to destroy resistant weed growth
during the remainder of the summerfallow.
Fall applied liquids:
All liquid formulations must be incorporated at least twice with the implement operated in
two different directions. The initial incorporation must be done within 24 hours after application. The second
incorporation (and subsequent incorporations) may be done whenever necessary to destroy resistant weed growth
during the remainder of the fallow season. Shallow tillage (5 to 8 cm) is necessary in the spring prior to planting.
Fall applied granules in wheat and barley:
Granules can be applied in the fall between September 1 and prior to
soil freeze-up for the control of green foxtail in the following year. Granules should be applied to standing stubble
or pre-worked stubble. The initial incorporation must be done within 24 hours of application. For best results, it is
recommended to do both incorporations in the fall followed by tillage (5 to 8 cm) in the spring prior to planting.
Caution:
Fall application is not recommended in situations where lack of trash cover combined with required
incorporation would leave the soil exposed to erosion.
Spring granules (in year of seeding)
:
Granular formulations: incorporate twice in cross directions using a tandem
disc, tandem disc, discer or field (vibrashank type) cultivator set to work 8 to 10 cm for the first incorporation. The
first incorporation should be done as soon as possible after application, but can be delayed up to 24 hours. The
second incorporation can be delayed for at least 3 - 5 days following the first incorporation. This allows time for
greater release of granular trifluralin onto soil particles and assures more uniform distribution in soil.
Spring liquid formulations in canola and specialty crops:
(
in year of seeding) must be incorporated at least twice
with the implement operated in two different directions. The initial incorporation must be done within 24 hours after
application. The second incorporation should be a discing or cultivation in a cross direction at the same depth any
time prior to planting. Shallow tillage (5 to 8 cm) is necessary in the spring prior to planting.
Spring liquid formulations in wheat and barley:
Liquid formulations must be applied after seeding and shallowly
(2 - 4
cm), incorporated with tyne or diamond tooth harrows into trash-free soil, operating at a minimum speed of
9
km/hr. The first incorporation should be performed in the same direction of application. The second incorporation
should be performed at the right angle to the first. Both incorporations should be done within 24 hrs of application.
Application Tips
Do not apply on soils that are wet, in poor tilth and contain 15% or more organic matter. Do not apply on soils with
less than 2% organic matter. Application to severely eroded knolls is not recommended.
Do not apply to fields spread with manure during past 12 months. Do not apply to soils that are subjected to long-
term flooding. Do not apply granular formulation on stubble in the fall for wheat when the crop harvested in the
current calendar year was treated with trifluralin-based products. This includes applications made in the previous
summer or fall. Seed into a firm, moist, weed-free seedbed using a double disc press drill or hoe drill set to seed
3
to 6 cm deep. If a discer or air seeder is used for seeding, separate spring tillage may not be necessary. However,
care must be exercised such that the discer or air seeder is set to uniformly place the seed 3 to 6 cm deep and the
seedbed should be firmly packed or harrowed after seeding to promote good germination.
Wheat:
Avoid deep
seeding, loose seedbeds and seeding into cold soils. When seeding semi-dwarf wheat, special care should be taken
to ensure shallow seeding. Apply only on trash-free or summerfallow fields.
Flax and Lentils:
Shallowly till and
Trifluralin (cont’d)