Herbicides
79
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
Restrictions
Re-cropping
:
Plant only to corn in year of treatment. The use of atrazine on the prairies is not recommended when
corn is grown in rotation with other crops except triazine-tolerant canola. Breakdown of atrazine in the soil is slow
and may cause injury to sensitive crops (e.g. cereals, canola, sugar beets) one or more years after application. Crops
most tolerant after corn and triazine tolerant canola are sorghum, then flax, faba beans and peas. The risk of damage
to succeeding crops from atrazine residues may be reduced by ploughing or deep tilling treated fields in the fall prior
to seeding the next crop in the rotation. Spreading and incorporating manure may also help to reduce the atrazine
levels. Uneven application, excessive sprayer overlap or applications in excess of recommended rates will not injure
corn but may result in a longer carryover of atrazine residues. A prolonged period of dry weather will also lengthen
the time that atrazine residues remain in the soil.
Rainfall
:
Rainfall will activate the chemical, carrying it into the root zone where kill will begin.
Grazing
:
Do not graze treated immature crops or cut for fodder.
Environmental Precautions
Toxic to non-target terrestrial plants and aquatic organisms. Do not over-spray or drift to non-target aquatic habitats.
Leave at least 10 m from the downwind edge of the spray swath to the sensitive terrestrial and aquatic habitats.
Do not mix or load within 30 m of any wells, lake, streams, ponds, dugouts or sinkholes. Heavy rainfall on
sandy soils may cause runoff and leaching. To reduce runoff from treated areas into aquatic habitats, consider the
characteristics and conditions of the site before treatment. Contamination of aquatic areas as a result of runoff may
be reduced by including a vegetative strip (buffer zone) between the treated area and the edge of the water body.
The use of Atrazine may result in contamination of groundwater, particularly on 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
Very low acute mammalian toxicity. Acute oral LD
50
(
rats) Aatrex = 1,075 mg/kg. May cause eye irritation. Very low
toxicity to fish and birds.
Storage
Heated storage required. If stored in unheated areas, the product should be warmed and agitated thoroughly prior to
using.
Attain XC/Flurox-24
Group 4
Formulation
Product
Company
Active ingredient
Formulation Container size Acres to treat
per package
Attain XC A(PCP# 29643)
Dow AgroScience
Canada Inc
Fluroxypyr: 333 g/L
EC
5
L, 8 x 2 x
7.5
L bulk
40
or 53 acres
(
case), 240 - 320
acres for bulk
package
Attain XC B(PCP# 29264)
Dow AgroScience
Canada Inc
2,4-
D LV ester: 660 g/L EC
2
x 6.8 L,
4
x 81.6 L
bulk
Flurox (PCP# 30028)
Nufarm Agriculture
Inc.
Nufarm Fluroxypyr 180:
180
g/L
EC
7.28
L
30 - 40
acres
2,4-
D 700 (PCP# 27820)
2,4-
D 700 ester: 660 g/L EC
10.3
L
30 - 40
acres
Atrazine (cont’d)