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Safety - page 25 • First aid - page 33 • Resistance management - page 41
Herbicides
Runoff
:
To reduce runoff from treated areas into aquatic habitats, consider the characteristics and conditions of the
site before treatment.
Drift
:
Avoid overspray or drift onto crops, ornamental plants, lawns, grazing areas and other sensitive areas.
Toxicity
Moderate acute oral LD
50
(
rats) = 612 mg/kg body weight.
Caution
:
Symptoms of acute poisoning may occur. Intake can cause heart, liver and kidney damage and can be fatal.
It can be absorbed through the skin.
Storage
Heated storage required. If crystallization occurs because of storage below 0° C, warm to room temperature and
agitate until reconstituted.
Grazon
Group 4
Formulation
Product
Company
Active ingredient
Formulation
Container size
Grazon (PCP# 27634)
Dow AgroSciences
Picloram: 65 g/L + 2,4-D: 240 g/L Emulsifiable concentrate 2 x 10 L, 110 L
Crops and Staging
Permanent grass pasture and rangeland. Apply in spring or early summer after first growth appears.
Weeds, Rates and Staging
Weeds controlled at 1.5 L/acre (season-long control only)
Canada thistle
dandelion
yarrow
Weeds controlled at 2.8 L/acre
burdock
common ragweed
fleabane
goldenrod
plantain
prickly lettuce
red clover
sweet clover
vetch,
wild carrot
Registered Tank Mixes
None registered.
Application Information
Apply with ground sprayers or by aircraft using a drift control system. Water volume: Ground: 80 L/acre.
Air: Minimum 8.1 L/acre.
Application Tips
Apply in spring or early summer after weeds have fully emerged and when weeds are growing rapidly. Ensure that
there is adequate coverage of target weeds. Broadleaf crops are extremely sensitive to Grazon, and care should be
taken to prevent drift onto sensitive crops. Use appropriate drift control measures to prevent Grazon from affecting
sensitive, non- target vegetation. Do not apply on soils that are very permeable (sandy loam to sand) through the
entire profile and that have an underlying shallow aquifer.
How it Works
Interferes with cell division, causing leaf cupping, stem distortion and eventual death of plant. Grazon is absorbed
through leaves and roots.
Expected Results
Perennial weeds show distorted stems and cupped leaves, which turn yellow and then brown. Usually native grass
Gramoxone (cont’d)