Herbicides
231
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
Environmental Precautions
Overspray or drift to sensitive habitats should be avoided. A buffer zone of 30 metres is required near sensitive
terrestrial habitats including forested areas, shelter belts, woodlots, hedgerows, and shrublands and a 5 metre buffer
zone is required near sensitive aquatic habitats. Avoid contamination of aquatic habitats.
Drift
:
Avoid conditions and equipment that may result in spray drift.
Toxicity
PrePass has an extremely low acute toxicity. Acute Oral LD
50
(
rats) = >5,000 mg/kg.
Storage
Store in dry, heated storage. If products are frozen, bring to room temperature and agitate before use.
Prestige XC
Group 4
Formulation
Product
Company
Active ingredient
Formulation Container Size
Prestige XCA (PCP# 29462)
Dow
AgroSciences
Fluroxypyr: 333 g/L
Emulsifiable
concentrate
3.3
L or in bulk 4 x 9.9 L
Prestige XCB (PCP# 25464)
Clopyralid: 50 g/L + MCPA: 280 g/L
2
x 8.0 L. or in bulk 4 x 96 L
120-160
acres/1 drum and 2 jugs
Crops and Timing
Crop
Timing
Barley, canarygrass, wheat, including durum, winter wheat
3
leaf stage until flag leaf emergence
3
leaf to just before flag leaf - winter wheat
Forage grasses (seedling or established stand) grown for seed
production: Creeping red fescue, intermediate wheat grass, crested
wheat grass, meadow brome grass, smooth brome grass, tall fescue,
timothy
4
leaf - flag leaf stage
Caution
:
Do not apply to crops underseeded with legumes.
Weeds, Rates and Staging
Apply at 2 - 4 leaf stage, unless otherwise stated
The low rate: The 27 acre per case rate Prestige XC A at 0.13 L/acre plus Prestige XC B at 0.6 L/acre controls the following
weeds
Canada thistle* (low infestation)
cleavers (1-4 whorls)
flixweed (rosettes only)
kochia
lamb’s-quarters
shepherd’s purse
stinkweed
stork’s-bill * * (1-8 leaf)
volunteer flax (1-12 cm)
volunteer sunflower
wild buckwheat (1 - 8 leaf)
wild mustard
The high rate: The 20 acre per case rate Prestige XC A at .17 L/acre plus Prestige XC B at 0.8 L/acre controls the above weeds
plus following weeds
annual sow thistle
Canada thistle (medium to high infestation)
common chickweed**,
1
dandelions***
perennial sow thistle*
redroot pigweed
round-leaved mallow (1 - 6 leaf)
Russian pigweed
scentless chamomile
tartary buckwheat
*
Season-long control of thistle with some regrowth in the fall (top growth control) ** Suppression *** Spring rosettes only
1
Including biotypes resistant
to Group 2 herbicides
PrePass XC (cont’d)