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Safety - page 25 • First aid - page 33 • Resistance management - page 41
Herbicides
How it Works
A non-selective, systemic herbicide that moves from the foliage into roots and kills the entire plant.
Expected Results
Wilting and yellowing of annual weed occurs within 2 - 4 days; perennial requires 7 - 10 days. Complete browning of
above ground growth and deterioration of roots occurs. Cool, cloudy conditions may slow activity.
Rainfall:
Heavy rainfall immediately after application may wash the chemical off the foliage and a repeat treatment
may be required. Do not apply if rainfall is forecast for the time of application.
Note. Roundup Transorb HC,
Roundup WeatherMax, Roundup Ultra 2, and R/T 540:
Rainfall occurring within 60 minutes of treatment may
result in reduced weed control.
Movement in the Soil:
Negligible leaching.
Grazing Restrictions:
Do not graze or harvest treated areas until plants have turned brown and started to deteriorate.
Re-cropping Intervals:
No restrictions.
Environmental Precautions
Avoid direct application to any body of water populated with fish or used for domestic purposes. Do not use in
areas where adverse impact on domestic water or aquatic species is likely. Do not contaminate water by disposal
of waste or cleaning of equipment. Avoid all drift or contact with vegetation for which treatment is not intended as
damage or destruction may occur. Overspray or drift to important wildlife habitats such as bodies of water, wetlands
(
e.g., sloughs), shelterbelts, woodlots and other cover on the edges of fields frequented by wildlife, should be
avoided. Observe following buffer zone guidelines:
Ground Applications:
Leave a 15 metre buffer zone between
the last spray swath and the edge of the spray boom to non-target areas to minimize drift damage.
Toxicity
Very low acute mammalian toxicity. Acute oral LD
50
= 4,320 mg/kg. Eye irritant, non-toxic to bees, birds and fish.
Storage
Heated storage is not required. May be stored below 0° C.
Gramoxone
Group 22
Formulation
Product
Company
Active ingredient
Formulation
Container size
Gramoxone (PCP# 8661)
Syngenta
Paraquat: 200 g/L
Solution
4
x 5 L
Crops, Rates and Staging
Pre or post seeding weed burndown for annual and perennial weeds.
Annual grasses and broadleaf weeds
:
seedlings.
Perennial weeds, including quackgrass
:
growth stage is not specified on the label.
Crop
Rate
Timing and specific comments
Barley, canaryseed, corn (field, sweet),
dry common beans, field peas, flax,
lentils, mustard, oats, potatoes, rye,
soybeans, sunflower, triticale, wheat
0.8 - 1.6
L/acre
Apply before or after seeding, but prior to crop emergence to
emerged weeds. For control of winter annual weeds, or when
weed growth is dense and weeds are greater than 10 cm in
height, use at least 1.21 L per acre and higher volumes of
water. Apply with a minimum of 40 L of water/acre.
Glyphosate (cont’d)