Herbicides
87
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Safety - page 25 • First aid - page 33 • Resistance management - page 41
Liquid
:
The first incorporation should be completed as soon as possible on the day of spraying.
Granules
:
The first incorporation should be completed within 48 hours of application. The second incorporation
for both liquid and granules may or may not be done immediately after the first. For maximum results from spring
application of granules, delay second incorporation for at least 3 - 5 days.
Extra Strength Avadex BW/MicroActiv + fertilizer banding
:
Avadex BW/MicroActiv
may be broadcast prior
to or in conjunction with fall fertilizer banding. Banding unit should be operated at no less than 8 km/h to provide
adequate soil mixing. Depth of operation of banding unit should be as recommended for proper fertilizer placement.
Effective shank spacing of 30 cm or less will provide optimum results.
Spring application
:
If Extra Strength Avadex BW/MicroActiv is applied in the spring prior to banding unit operated
using knife-type openers, two additional incorporations are required at right angles.
Fall application
:
The use of tine harrow on banding unit is not required but may provide superior incorporation
where excessive trash is not a factor. The second incorporation should be at a right angle to the banding operation
with suitable disc or cultivator type implement.
Extra Strength Avadex BW/MicroActiv in high disturbance systems (minimum tillage)
:
A high disturbance
incorporation can be conducted prior to seeding or as part of the seeding operation. A high disturbance system is one
that disturbs the soil enough so that emerged weeds are controlled by the tillage. (High disturbance may be caused
by the seed drill - cultivator or disc type, or with harrows following the seed drill or both.) Levelling the soil at or
after seeding with harrows will ensure uniform product coverage and best performance. Application of granules
10 - 14
days prior to incorporation is required for best results.
Application Tips
Choice of formulation
:
Use liquid formulation on soil free of trash. Use granules on all soils including those
with heavy trash cover. Granules may be applied in the fall prior to or in conjunction with fertilizer banding.
Fall minimum tillage application
:
Fall minimum tillage applications should be made when the average soil
temperature at the 5 cm depth is 4°C or less and within 3 weeks of soil freeze-up. This situation generally occurs
by October 1. No fall incorporation is required. Incorporation may be conducted in the spring prior to seeding or
at seeding. Do not use this treatment on soil with less than 2% organic matter. Under excessively warm or wet
conditions between application and crop emergence, control may be reduced. For best results on heavy wild oat
infestations, use the incorporated treatments only.
Spring minimum tillage application
:
Apply Extra Strength Avadex BW/MicroActiv granules in the spring when
average soil temperature at the 5 cm depth is 4°C or less. Applications should be made to soil which has adequate
trash cover to prevent soil erosion between application and seeding. Ensure that the time between application and
incorporation is a minimum of 10 - 14 days. Do not apply more than 4 weeks before intended seeding.
For optimum results with Extra Strength Avadex BW minimum tillage treatments, seed when wild oat growth is
noticeable in the field. This will ensure that the soil is warm enough for activation of Avadex BW. Minimum tillage
applications should not be made to fields covered with snow or excessive crop residue that will not allow granule
contact with soil. If excessive crop residue exists at the time of application, a vigorous harrowing can be used to
ensure that the herbicide granules make adequate contact with the soil. Under excessively warm or wet conditions
between application and crop emergence, control may be reduced. For best results on heavy wild oat infestations,
use the incorporated treatment only. Soil colour may not be a precise indicator of organic matter content. Ensure
that the application rate chosen from the table is appropriate for your soil type.
Field preparation
:
Make sure the soil is in good working condition. Reduce trash to an acceptable level before
application. If soil is excessively wet or lumpy, cultivate with suitable equipment to improve soil condition.
Seeding
:
Flax, mustard and rapeseed can be seeded in treated layers. Barley and wheat are more sensitive and
should be planted 6.0 - 7.5 cm. Wheat must be seeded below the treated layer. After seeding, any deep ridges left by
drills must be levelled by harrowing. Treflan/Rival Mixes: Drought conditions in the year of treatment may result in
higher levels of Treflan/Rival carryover. To avoid wheat injury, seed 6.0 - 7.5 cm into warm, moist seedbed.
How it Works
Absorbed by germinating wild oat shoots, usually resulting in death before emergence. Under dry conditions,
wild oats may emerge before being killed.
Expected Results
Wild oats: Usually kills wild oats before they emerge. Scraping away the soil 1 - 2 weeks following treatment will
expose white to yellow wild oats shoots 2.0 - 2.5 cm in length with pinched tips. Plants which have emerged and
absorbed a lethal dose will cease growth, leaves become brittle and bluish-green in colour. Under dry conditions, a
Avadex MicroActive/Extra Strength Avadex BW (cont’d)