Herbicides
233
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
can result in a risk of injury to field peas grown in the following year. If severe drought conditions are experienced
during the months of June to August inclusive in the year of application (less than 140 mm rain between June 1 and
August 31 or less than 175 mm rain in the whole year), delay seeding field peas an additional 12 months (22 months
following application). Contact your local Dow AgroSciences representative or retailer for more information before
seeding field peas following drought conditions in the previous year.
Do not seed crops other than those listed above for at least one year after treatment.
Environmental Precautions
This product is highly toxic to aquatic organisms. Avoid contamination of aquatic systems during application or
cleaning. Avoid overspray or drift to important wildlife habitats, such as ponds, wetlands, streams, woodlots and
shelterbelts. Observe buffer zones specified on the label.
Runoff
:
Use buffers to avoid contamination of sensitive aquatic and terrestrial areas.
Leaching
:
The use of this chemical may result in contamination of groundwater particularly in areas where soils are
permeable (e.g. sand, loamy sand and sandy loam soils) and/or the depth to the water table is shallow.
Toxicity
Prestige A
:
Very low mammalian toxicity. Acute oral LD
50
(
rats) = >2,000 mg/kg.
Prestige B
:
Clopyralid: Very low acute mammalian toxicity. Acute LD
50
(
rats) = >2,000.
MCPA: Moderate acute mammalian toxicity. Acute oral LD
50
(
rats) = technical 700 - 800 mg/kg. May case burns
upon contact with skin and eyes and can be absorbed through the skin.
Storage
Store in a dry, heated area. If product is frozen, bring to room temperature and agitate before use.
Primextra II Magnum
Group 5, 15
Formulation
Product
Company
Active ingredient
Formulation Container size
Primextra II Magnum (PCP# 25730)
Syngenta
Metolachlor: 400 g/L +
Atrazine: 320 g/L
Flowable
1
X 14 L jug
Crops and Staging
Crop
Staging
Corn, (field, silage, sweet)
Pre-plant incorporated or pre-emergence (only if irrigated within 10 days of application).
Weeds and Staging
Pre-emergence
American nightshade
annual smartweed
barnyard grass
crabgrass
Eastern black nightshade
fall panicum
giant foxtail
green foxtail
green smartweed
1
lady’s-thumb
1
lamb’s-quarters
prostrate pigweed
purslane
1
ragweed
1
redroot pigweed
1
wild buckwheat
witch grass
yellow foxtail
yellow nutsedge
wild mustard
1
1
Some naturally occurring triazine tolerant biotypes of these weeds may not be controlled by Primextra II Magnum. Refer to company label for specific
tank mix options.
Rate
Weed populations
Rate
Acres treated per 14 l jug
Light infestation
1.2
L/acre
11.7
Prestige XC (cont’d)