Herbicides
173
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
increases in abundance as a result of reduced competition. Poor results may be expected if weeds are not actively
growing in late summer or due to drought or frost.
Restrictions
Re-entry
:
DO NOT re-enter pastures within 3 days of application.
Rainfall
:
Heavy rainfall immediately after application may wash the chemical off the foliage, resulting in reduced
weed control. Do not apply if rainfall is forecast for the time of application.
Grazing
:
Do not allow lactating dairy animals to graze the treated areas within 7 days after application. Withdraw
meat animals from treated fields at least 3 days before slaughter. Feed livestock untreated forage for 7 days prior to
moving onto land that produce broadleaf crops.
Pre-harvest Intervals
:
Do not harvest forage or cut hay within 30 days after application
Re-cropping
:
Legumes may not be established in a pasture for several years after a Grazon treatment.
If legumes
are essential in a pasture, do not use Grazon.
Do not break up treated pasture and plant to sensitive broadleaf crops
for at least 5 years after application of Grazon. Do not move cut forage or manure from treated areas to areas that
may be seeded to a sensitive crop.
Environmental Precautions
Grazon is slightly toxic to aquatic organisms, including fish. Do not apply directly to any body of water. Grazon is
highly mobile in the soil and water. Do not allow runoff or spray to contaminate wells, irrigation ditches or any body
of water used for irrigation or domestic purposes.
Drift
:
Most broadleaved plants are very sensitive to picloram. Care should be taken to avoid spraying desirable
broadleaved plants during both growing and dormant periods.
Toxicity
Moderate acute mammalian toxicity. Acute oral LD
50
(
rats) = 2,598 mg/kg.
Storage
Store in a cool, dry place. Do not freeze. If freezing occurs, bring to room temperature and mix thoroughly.
Harmony K
Group 1, 2, 4
Formulation
Harmony K is a prepackaged mixture of the following products:
Product
Company
Active ingredient
Formulation Container size
Harmony Broadleaf (PCP# 30027)
E.I. duPont
Canada
Thifensulfuron-methyl: 8% + Tribenuron
methyl: 4% + Dicamba: 54%
WSG
2.1
kg
Harmony Grass (PCP# 29299)
Clodinafop-propargyl: 128 g/L
EC
1
x 7.2 L
Crops and Staging
Crop
Stage
Spring wheat (including durum)
2 - 5
leaf stage
Weeds and Staging
Apply to young, actively growing broadleaf weeds, less than 10 cm tall or across, unless otherwise stated.
Grassy weeds
green foxtail (1 - 5 leaf, before 3 tillers)
wild oats
(1 - 6-
leaf, before 4 tillers)
Grazon (cont’d)