Herbicides
211
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
Application Tips
Apply Nortron before or at planting time and incorporate into the soil to a depth of 2.5 - 5.0 cm. Deeper incorporation
may reduce effectiveness. Nortron may be applied pre-emergence at the time of planting or shortly after, but prior to
weed emergence.
Incorporation equipment
:
Hooded-power or ground-driven rotary tillers, rolling cultivators and harrows are most
effective for incorporating Nortron into the soil. Do not apply Nortron through soil injector shanks. All existing
vegetative growth should be thoroughly worked into the soil before treatment. Do not allow spray mixture to stand in
tank overnight.
How it Works
Uptake of ethofumesate occurs primarily via the emerging shoot as it passes upwards through treated soil; however,
for certain broadleaf species, root uptake is more important. Ethofumesate is non-volatile, and in all cases, uptake
occurs from aqueous solution.
Expected Results
Ethofumesate applied pre-plant incorporated with proper activation will normally not permit weed emergence. If
emergence should occur, uptake has occurred; seedling will show loss of vigour and eventual death.
Restrictions
Rainfall
:
Normally 1.5 cm of rainfall is sufficient to activate Nortron. In areas where moisture can be marginal,
incorporation is recommended.
Grazing
:
Do not graze the treated crops or cut for hay; there are not sufficient data available to support such use.
Re-cropping
:
Do not rotate with any crops other than sugar beets for 12 months after application. Thorough tillage
should precede the planting of crops other than sugar beets. If crop is lost due to climatic or soil conditions following
application of Nortron, do not plant crops other than sugar beets in Nortron-treated land during the same season.
Do not retreat field with Nortron. Wheat and barley may be injured if planted following a dry sugar beet year.
Environmental Precautions
Nortron/Etho SC is toxic to aquatic organisms and non-target plants. Observe buffer zones of 1 metre for aquatic
habitats and 2 meters for sensitive terrestrial habitats. Do not apply directly to water, and do not contaminate surface
or groundwater by cleaning of equipment or disposal of wastes.
Runoff
:
Avoid runoff from treated areas into aquatic habitats.
Toxicity
Moderate to low acute toxicity. Acute oral LD
50
(
rats) > 2,100 mg/kg. Causes eye or skin irritation.
Storage
Do not use or store near heat or open flames. Store Nortron in a cool place, above 0°C.
Nuance
Group 2
Formulation
Product
Company Active ingredient
Formulation
Container size
Nuance (PCP# 29468)
Cheminova Tribenuron-methyl: 75% Water disperable granule
320
g
Nuance is purchased alone but must be used in a mix with either 2,4-D ester or glyphosate.
Nortron/Etho SC (cont’d)