Herbicides
179
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
Application Tips
Good growing conditions promote weed growth and enhance the activity of HEAT WG. Weeds hardened off by cold
weather or drought stress may not be controlled. Insufficient water volumes or coarse sprays may also reduce control
levels. For desiccation purposes, apply HEAT when bean stems are green to brown, 80-90% of leaves have dropped
and pods are mature. In lentil, apply when bottom 15% of pods are dry and rattle. In field pea, apply when the
majority of pods are brown(70-80%). Note: Using glyphosate with HEAT for desiccation purposes may affect seed
germination.
How it Works
HEAT WG is rapidly absorbed by root and foliar uptake: once absorbed, it exhibits mobility in plants. HEAT WG
is a potent inhibitor of protoporhyrinogen oxidase (PPO). Cell membrane damage induced by inhibition of PPO
leads to plant death. Susceptible weeds develop injury symptoms within hours of application under active growing
conditions; plant death occurs within 3 to 5 days depending on growing conditions.
Restrictions
Rainfall
:
Follow the glyphosate manufacturers recommendation for rainfast.
Grazing
:
Field corn (60 days), legume forage (chickpea, lentil, field pea, soybean) (60 days), small grains
(
wheat,barley, oats) 30 days.
Pre-harvest Interval
:
Leave 60 days between application and harvest.
Desiccation Pre-harvest Interval
:
Dry, common beans - 2 days, field pea, lentil, soybean - 3 days,
sunflower - 7 days.
Re-cropping Restrictions
:
Registered crops may be reseeded if necessary in the event of crop failure. Lentil and
soybean may be reseeded only if the 10.4 g/a rate was applied. Canola, dry beans, flax and mustard may be seeded
the following year in addition to all registered crops without rate restrictions.
Toxicity
Very low acute mammalian toxicity. Acute oral LD
50
(
rats) = > 2,000 mg/kg
Storage
Store in cool, dry place.
Horizon NG/NextStep NG/Foothills NG/
Legend/Signal/Ladder/MPower
Aurora/Nufarm Clodinafop/Slam’R
Clodinafop/Bullwhip 240 EC
Group 1
Formulation
Product
Company
Active ingredient
Formulation Container size
Horizon
NG*
Horizon NG
*
(
PCP#
29089)
Syngenta
Clodinafop-propargyl: 60 g/L Emulsifiable
concentrate
2
x 7.57 L, 121 L
NextStep
NG*
NextStep (PCP# 29614)
Arysta
LifeScience
Clodinafop-propargyl: 60 g/L Emulsifiable
concentrate
1
x 7.57 L
Foothills
NG*
Foothills NG (PCP#
30341)
Viterra
Clodinafop-propargyl: 60 g/L Emulsifiable
concentrate
2
x 7.57, 121 L
Legend
Legend A (PCP# 29526
Interprovincial
Cooperative
Limited
Clodinafop-propargyl: 240 g/L Emulsifiable
concentration
1
x 3.68 L
Legend B (PCP# 29527)
Surfactant blend: 17%
2
x 6.4 L
Heat (cont’d)