268
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Safety - page 25 • First aid - page 33 • Resistance management - page 41
Herbicides
Weeds and Staging
Grass weeds 1 - 5 leaf prior to tillering unless otherwise noted.
barnyard grass
green and yellow foxtail: 1 - 5 leaf stage
(
prior to emergence of 3rd tiller)
Persian darnel
volunteer canaryseed: 1 - 6 leaf stage
(
max 3 tillers)
wild oats: 1 - 6 leaf stage (max 3 tillers)
Broadleaf weeds: Controlled at 1 - 4 leaf stage unless otherwise noted.
American nightshade
ball mustard
bluebur
Canada thistle (suppression)*
cocklebur
common buckwheat**
common groundsel**
common ragweed**
cow cockle
flixweed
green smartweed
kochia (< 5 cm tall)
lady’s-thumb
lamb’s-quarters**
night-flowering catchfly
pale smartweed
perennial sow-thistle (suppression)*
redroot pigweed
Russian thistle (< 5 cm tall)
scentless chamomile
shepherd’s-purse
stinkweed**
tartary buckwheat**
velvetleaf
volunteer canola
volunteer sunflower
wild buckwheat**
wild mustard**
wild tomatoes*
wormseed mustard**
*
Weeds controlled 1 - 6 leaf stage
**
Weeds controlled 1 - 8 leaf stage
Registered Tank Mixes
None.
Application Information
How to apply
:
With ground equipment or aircraft
Signal
: 93 - 117
mL/acre
Mextrol
: 0.5
L/acre
Signal Adjuvant
: 0.8%
v/v or 0.8 L per 100 L of water
Water volume
:
Ground: minimum 20 - 40 L per acre. Aerial: minimum 12 L/acre.
Mixing Instructions
Use mixing instructions “c” on page 13.
Application Tips
For optimum results, apply to actively growing weeds. An early application will maximize crop yields by reducing
weed competition. Do not apply to crop that is stressed by conditions such as frost, low fertility, drought, flooding,
disease or insect damage as crop injury may result. Application before the 4-leaf stage may injure the crop. Thorough
coverage of the plants is essential for consistent control.
How it Works
Signal herbicide is absorbed by the leaves and is rapidly translocated to the growing points of leaves and stems.
Approve contains two components, bromoxynil and 2,4-D. Bromoxynil is a contact type herbicide, which inhibits
photosynthesis and plant respiration. 2,4-D is a hormone type herbicide, which causes abnormal growth, affects
respiration, food reserves and cell division in broadleaf plants. Absorbed primarily by leaves and stems and
translocated to the growing tips and roots.
Expected Results
Small burn spots on the leaf can appear within hours. Death takes up to 2 weeks. Grassy weeds: Depending on
species, growing conditions and crop competition, leaves and growing points turn yellow within one to three weeks
after application. Further colour changes and loss of vigour will be observed, followed by a browning and complete
control 3-5 weeks after application.
Restrictions
Rainfall
:
Rainfall within 1 hour of application may reduce weed control.
Grazing
:
Do not graze or cut for livestock feed within 30 days of application. Withdraw meat animals 3 days before
slaughter.
Pre-harvest Interval
:
Do not harvest within 60 days of application.
Re-cropping
:
No re-cropping restrictions the year after application.
Signal M (cont’d)