LIMITS ON LATE FOXTAIL HERBICIDE APPLICATION IN WHEAT
Wheat is
rapidly growing and as well as weeds including green and yellow foxtail
(pigeongrass). If herbicide application is still required for foxtail control
in wheat, consider the following wheat and foxtail stage limits for
post-emergence foxtail herbicides:
|
|
Wheat
|
Foxtail
|
|
Achieve
|
Up to
boot
|
5-leaf
|
|
Cheyenne
|
End of
tillering or 6-leaf (HRS only)
|
2-tiller
(green only)
|
|
Dakota
|
End of
tillering, or 6-leaf (HRS only)
|
2-tiller
(green only)
|
|
Discover
|
Up to
emergence of 4th tiller
|
5-leaf
|
|
Hoelon
|
Up to
4-leaf
|
4-leaf
|
|
Puma
|
6-leaf
(prior to jointing)
|
2-tiller
|
|
Stampede
|
4-leaf
(durum), 5-leaf (HRS)
|
3-leaf
|
|
Tiller
|
Up to
6-leaf (HRS only)
|
2-tiller
|
Refer to herbicide labels and NDSU
Extension Service circular W-253 >2000 ND Weed Control Guide' for required
information on herbicide use.
ASSERT FOR
WILD MUSTARD CONTROL IN SUNFLOWER
With the exception of Roundup as a shielded-application, Assert is the
only post-emergence herbicide currently available for broadleaf weed control in
sunflower. Assert is registered through ND supplemental labeling at 0.6 to 0.8
pt/acre or 4.5 to 6 oz/acre WGD (about $7.50 to 10/acre) for POST control of
wild mustard in the rosette stage and prior to bloom. In addition to excellent
wild mustard control, small wild oat and wild buckwheat may also be suppressed
with Assert. A non-ionic surfactant containing at least 80% active ingredient
must be added to Assert at the rate of 0.25% v/v. Do not tank mix Assert with
any insecticides or other herbicides.
Apply Assert to sunflower at the 2- to 8-leaf stage but before the crop
is 15-inches tall. Severe sunflower injury may occur with high temperatures and
humidity at application. Sunflower variety, growth stage, weather conditions,
humidity, spray volume, spray additives, and type of application may affect
sunflower safety. Risk of injury should be considered when deciding whether
treatment is warranted. Do not apply to sunflower under drought or heat stress.
Apply Assert only when air temperature plus relative humidity is below 150.
Sunflower damage from misapplication may range from plant stunting to head
deformation.
After Assert application, wait 4 to 5 days before between-row
cultivation. Crop rotation restrictions exist.
Refer to the Assert label and NDSU Extension Service circular W-253 >2000
ND Weed Control Guide= for additional details.