Herbicides
295
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
pack the soil in the spring to ensure a firm seedbed and accurate depth of seeding. Seed into well-packed and moist
seedbed. Do not seed deeper than 4 cm.
How it Works
Kills weed seedlings as they germinate. Inhibits cell division in the actively growing points of roots ands shoots.
Expected Results
Most weeds die before emerging. Weeds will exhibit swelling at the coleoptile region, stubby thick primary root
development and lack of secondary roots, which leads to death due to inadequate moisture absorbing ability.
Restrictions
Rainfall:
No effect once trifluralin is incorporated into the soil.
Cropping Restrictions:
Oats, sugar beets and small-seeded grasses such as timothy, canaryseed grass and creeping
red fescue should not be grown in rotation following a crop treated with trifluralin based products. Do not seed wheat
as a rotational crop if trifluralin and/or ethalfluralin have been used at an oilseed/special crop/barley rate for two
consecutive crops. Do not direct seed (zero till) a rotational crop into standing stubble on land that has been treated
with trifluralin or ethalfluralin for the previous crop.
Grazing Restrictions:
Do not graze the treated crop or cut for hay; there is not sufficient data to support such use.
Environmental Precautions
Direct contamination of any body of water with trifluralin may kill fish. Avoid contamination of water bodies.
Trifluralin is considered non-toxic to bees because of the nature of the formulation. Trifluralin is considered very
highly toxic to aquatic organisms on an acute basis, and essentially non-toxic to birds. Trifluralin is absorbed by the
soil and is resistant to leaching. There is little lateral movement in soil.
Toxicity
Very low acute mammalian toxicity. Acute oral LD
50
(
rats) - technical 10,000 mg/kg body weight.
Storage
Granular formulations must be stored in a cool, dry location, out of sunlight. Do not store Rival EC below 5°C.
Do not freeze Treflan EC and Bonanza EC formulations.
Triton C
Group 2, 4
Formulation
Product
Company
Active ingredient
Formulation
Container size
Triton C (PCP# 28622)
E. I. duPont
Canada
Thifensulfuron methyl :10.3%
+ tribenuron methyl: 5.15% +
quinclorac: 51.55%
Water dispersible
granules
1.566
kg
40
acres per case
Crops and Staging
Crop
Staging
Spring barley (malt and feed)
2 - 5
leaf stage
Wheat (spring and durum)
Trifluralin (cont’d)