Herbicides
105
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
Registered Tank Mixes
Glyphosate
Application Information
Apply with ground equipment only. Water volume: Minimum 40 L per acre.
Application Tips
Good growing conditions promote weed growth and enhance the activity of BlackHawk. Weeds hardened off by cold
weather or drought stress may not be controlled. Insufficient water volumes or coarse sprays may also reduce control
levels.
How it Works
Aim EC is a contact herbicide; therefore, coverage of the weeds is essential for control. 2,4-D is a systemic, non-
selective herbicide readily absorbed through leaves or roots. It is translocated primarily in phloem with the sugars
but can also move with water in the xylem. Accumulation is primarily in the young, rapidly growing meristematic
regions of roots or shoots. It inhibits pigments, including chlorophyll, leading to death.
Expected Results
Symptoms appear very rapidly (a few hours under bright conditions). Leaves of weeds take on a water-soaked
appearance, followed by wilting and necrosis. Susceptible plants become malformed before they die. Complete death
occurs within a few days.
Restrictions
Rainfall
:
No rainfast period is specified on the label for Aim; required interval may be up to 8 hours. Contact
manufacturer for more information.
2,4-
D ester
:
A rain-free period of 2 hours is needed after application.
Grazing
:
Do not permit lactating dairy animals to graze fields within 7 days after application. Do not harvest or cut
treated crops for forage until 30 days after application. Withdraw meat animals from treated fields at least 3 days
before slaughter.
Re-cropping
:
No restrictions the year after treatment.
Restricted-entry Interval
:
Do not enter treated area within 12 hours after application.
Environmental Precautions
Runoff
:
To reduce runoff from treated areas into aquatic habitats, avoid application to areas with moderate to steep
slope, bare soil, compacted soil or clay.
Toxicity
Aim EC (carfentrazone): Very low acute mammalian toxicity. Acute oral LD
50
(
rats) = 4,077 mg/kg. Very toxic to
algae, and much less toxic to fish and aquatic organisms.
2,4-
D 700 ester: Moderate acute mammalian toxicity. Acute oral LD
50
(
rats) = technical 300 - 1,200 mg/kg. 2,4-D
formulations are toxic to small mammals, birds, aquatic organisms and non-target terrestrial plants.
Storage
Store in a cool, dry place and avoid excess heat. 2,4-D ester may be frozen.
BlackHawk (cont’d)