Introduction

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Crops and Staging:
Crop
Barley, oat, spring wheat (including durum)
Winter wheat
Stage
2 to 5 leaf
Spring application only; up to 12 inches (30 cm) high (top leaf extended)
Weeds, Rates and Staging:
Weeds controlled at the 2 to 3 leaf stage unless otherwise indicated.
Apply at 0.61 L per acre to control:
º Lamb’s-quarters
º Stinkweed º Volunteer canola
Apply at 1.0 L per acre to control the weeds listed above plus:
º Canada thistle*
º Chickweed
(Common)
* Top Growth Control only.
º Cleavers
(1 to 2 whorls)
º Kochia
º Lady’s-thumb
(suppression)
º Ragweed (Common)
DO NOT apply Optica Trio more than once or follow application with any related product in the same year.
º Wild mustard
º Redroot pigweed
º Wild buckwheat
Weed Control
Application Information:
• Water Volume: Minimum 20 L per acre.
• Nozzles and Pressure: 30 to 43 psi (200 to 300 kPa) when using conventional flat fan nozzles. Low drift nozzles may
require higher pressures for proper performance. Use a combination of nozzles and pressure designed to deliver
thorough, even coverage of ASABE medium droplets or larger.
How it Works:
Refer to Table 9 on page 48.
Effects of Growing Conditions:
Less than satisfactory control may result if weeds are not actively growing such as under conditions that are extremes of hot
or cold, dry or wet weather prior to spraying.
Tank Mixes:
Herbicides:
• Spring wheat (including durum):
º Signal (93 mL per acre) plus supplied adjuvant.
Insecticides: None registered.
Fungicides: None registered.
Fertilizers: None registered.
Note: The above mixes are those listed on the Optica Trio label only.
Adding ingredients in the correct order is critical for optimum performance. Check labels of products to be mixed for
directions. General guidelines can be found on page 8.
Restrictions:
• Rainfall: No rainfast period is specified on the label; required interval may be up to 8 hours. Contact manufacturer for
more information.
• Re-entry Interval: DO NOT enter treated fields for 12 hours.
• Grazing Restrictions: DO NOT feed treated crops to milking animals or harvest for forage within 7 days of application.
Meat animals grazing treated crops must be removed 3 day prior to slaughter.
• Pre-harvest Interval: No pre-harvest interval indicated on label when Optica Trio is used alone.
• Re-cropping Interval: No information provided on label. Contact manufacturer for information.