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GENERAL INFORMATION
GBX Herbicide is a selective postemergent herbicide for the control of annual broadleaved weeds in spring wheat, durum wheat, spring barley and oats, not underseeded with legumes. GBX Herbicide offers a novel mode of action for controlling hard-to-kill annual broadleaved weeds such as kochia (including ALS resistant biotypes) and cleavers. GBX Herbicide will also provide suppression of hempnettle, wild buckwheat and chickweed.

MODE OF ACTION
GBX Herbicide is a systemic auxin-type herbicide and moves within the plant for control of exposed and underground plant tissues. The product controls weeds by disrupting normal plant growth patterns. Symptoms of weeds include epinasty (twisting of the stems) and swollen nodes.

GENERAL USE PRECAUTIONS

Sensitive Plants
Do not apply GBX Herbicide directly to, or otherwise permit it to come in direct contact with susceptible crops or desirable plants including alfalfa, edible beans, canola, flowers and ornamentals, lentils, lettuce, peas, potatoes, radishes, soybeans, sugar beets, sunflowers, tomatoes or tobacco.

Non-Target Sites
Do not apply where proximity of susceptible crops or other desirable plants is likely to result in exposure to spray or spray drift. See Environmental Hazards section of the label.

Crop Rotation
Fields previously treated with GBX Herbicide can be seeded the following year to alfalfa, barley, canola, corn, dry beans, flax, forage grasses, lentils, mustard, oats, peas, potatoes, rye, soybeans, sugar beets, sunflowers or wheat or fields can be summerfallowed.

Tank Mixtures
In some cases, tank mixing a pest control product with another pest control product or a fertilizer can result in biological effects that could include, but are not limited to: reduced pest efficacy or increased host crop injury. The user should contact Dow AgroSciences Canada Inc. at 1-800-667-3852 or www.dowagro.ca for information before mixing any pesticide or fertilizer that is not specifically recommended on this label. The user assumes the risk of losses that result from the use of tank mixes that do not appear on this label or that are not specifically recommended by Dow AgroSciences Inc.

Spray Equipment Precaution
Do not apply through any type of irrigation system.
DO NOT APPLY BY AIR.

To Reduce Spray Drift:
 Use nozzles delivering higher volumes and coarser droplets.
 Use low pressures (200 to 275 kPa).
 Use 100 L/ha of spray solution.
 Spray when the wind velocity is 15 km/hr or less.
 Spot treatments should only be applied with a calibrated boom to prevent over-application.

Equipment Clean-Up
Equipment used to apply GBX Herbicide should not be used to apply other pesticides to sensitive crops without thorough cleaning. Contact your GBX Herbicide dealer for detailed equipment cleaning procedures.

DIRECTIONS FOR USE
READ THE ENTIRE LABEL BEFORE USE. FAILURE TO FOLLOW LABEL INSTRUCTIONS MAY RESULT IN ERRATIC WEED CONTROL OR CROP DAMAGE. DO NOT APPLY TO CROPS UNDERSEEDED WITH LEGUMES.

Crops Registered
spring wheat, durum wheat, spring barley,oats

GBX HERBICIDE ALONE
Apply GBX Herbicide for postemergent control of cleavers and kochia, including ALS resistant kochia and other broadleaved weeds infesting spring wheat, durum wheat and spring barley and oats. See following table for weeds controlled/suppressed and applications rates.

APPLICATION DIRECTIONS

Application Timing
Apply to actively growing wheat and barley and oats from the 2-leaf crop growth stage up to and including initiation of stem elongation. Apply when weeds are actively growing. Best results are obtained from applications made to seedling weeds. Only weeds emerged at the time of treatment will be controlled.
Extreme growing conditions such as drought or near freezing temperature prior to, at and following time of application may reduce weed control and increase the risk of crop injury at all stages of growth. Foliage that is wet at the time of application may decrease control. GBX Herbicide applications are rainfast within 1 hour after application. Under conditions of low crop and high weed density, control may be reduced.

Preharvest/Grazing Intervals (GBX Herbicide applied alone)
Livestock may be grazed on treated crops 3 days following application.
Do not harvest the treated crop within 60 days after application.

TANK-MIX COMBINATIONS - GBX HERBICIDE + CURTAILTM M HERBICIDE
GBX Herbicide mixed with Curtail M Herbicide will control a wide spectrum of broadlead weeds. Refer to Curtail M Herbicide label for additional precautions and directions for use, particularly crop rotation restrictions.

Mixing Instructions
Add the correct amount of GBX Herbicide to spray tank 1/2 filled with water and agitate. Add the correct amount of Curtail M Herbicide and continue to agitate.

Timing of Application
Apply postemergence when weeds are in the seedling stage (2-4 leaf) and when spring wheat, durum wheat, spring barley and oats are in the 3-leaf to just before the flag leaf emergence stage. Do not apply later than the flag-leaf stage.

Low Rate: To control or suppress the following weeds apply a uniform spray containing GBX at 0.31 L/ha tank mixed with Curtail M Herbicide at 1.5 L/ha.
High Rate: To control or suppress the following weeds apply a uniform spray containing GBX at 0.41 L/ha tank mixed with Curtail M Herbicide at 2.0 L/ha.

The active ingredients in this tank mixture will only control chickweed that is emerged at TIME OF application. Chickweed plants which emerge after application will not be controlled. To improve the reduction in chickweed population at the end of season, delay the timing of application as late as possible to when the majority of chickweed plants have emerged. The reduction in chickweed population will also be improved in crops which are more competitive and which allow limited light penetration.

Pre-Harvest/Grazing Intervals (GBX Herbicide + Curtail M Herbicide)
Do not cut or graze treated fields within 7 days after application.
Do not harvest the treated mature crop within 60 days after application.
When tank mixing with Curtail M Herbicide, wear goggles or face shield, coveralls and chemically resistant gloves, apron and boots when mixing, loading and during clean-up and repair.
Curtail M Herbicide contains an ingredient that is rapidly absorbed through the skin and respiratory tract.

TANK MIXES WITH GBX HERBICIDE + CURTAIL M HERBICIDE FOR ANNUAL GRASS CONTROL (Do not apply to oats)
Tank mixtures of GBX Herbicide + Curtail M Herbicide with other herbicides will provide control of additional weeds. See following table for tank mixes with GBX Herbicide + Curtail M Herbicide. Follow all precautions, minimal interval to harvest and directions for use on the GBX Herbicide and tank-mix partner labels.

TANK-MIX COMBINATION - GBX HERBICIDE + 2,4-D ESTER HERBICIDE (Do not apply to oats)
For control of a wide spectrum of broadleaved weeds (see following table) apply GBX Herbicide tank mixed with 2,4-D Ester Herbicide. Apply postemergence when weeds are in the seedling stage (2-4 leaf) and when spring wheat, durum wheat and spring barley are in the 4-leaf to flag-leaf stage. Application before the 4-leaf stage of wheat and barley may cause severe twisting of leaves and stem, and head deformities which may reduce yield up to 10%. Do not apply later than the flag-leaf stage.

Rates of Applications
I. Low Rate: To control the following weeds apply a uniform spray containing 0.23 L/ha GBX Herbicide and 420 g a.e./ha 2,4-D Ester Herbicide (equivalent to 0.64 L/ha of 2,4-D Ester LV700 Herbicide) in a minimum of 100 L of water per hectare to thoroughly cover the weeds.

II. High Rate: To control the above weeds plus the additional weeds listed below, apply a uniform spray containing 0.31 L/ha of GBX Herbicide and 560 g a.e./ha of 2,4-D Ester Herbicide (equivalent to 0.85L/ha of 2,4-D Ester LV700 Herbicide) in a minimum of 100 L of water per hectare to thoroughly cover the weeds.

Mixing Instructions
Add the correct amount of GBX Herbicide to spray tank 1/2 filled with water and agitate. Add the correct amount of 2,4-D Ester Herbicide (e.g. 2,4-D Ester 700 Herbicide) and continue to agitate.

Pre-Harvest/Grazing Intervals (GBX Herbicide + 2,4-D Ester Herbicide)
Do not permit lactating dairy animals to graze fields within 7 days after application.
Do not harvest forage or cut hay within 30 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.
Do not harvest the treated mature crop within 60 days after application.

TANK-MIX COMBINATIONS - GBX HERBICIDE + 2,4-D ESTER HERBICIDE + OTHER HERBICIDES (Do not apply to oats)
Tank mixtures of GBX Herbicide + 2,4-D Ester Herbicide with other herbicides will provide control of additional weeds. For products which may be tank mixed with GBX Herbicide + 2,4-D Ester Herbicide and the additional weeds controlled see following table. Follow all precautions, minimal interval to harvest and directions for use on the GBX Herbicide and tank-mix partner labels.

TANK-MIX COMBINATIONS – GBX HERBICIDE + 2,4-D ESTER HERBICIDE + REFINE EXTRA 75 DF HERBICIDE OR REFINE EXTRA 75 TOSS-N-GO HERBICIDE OR REFINE SG HERBICIDE OR REFINE SG TOSS-N-GO HERBICIDE (Do not apply to oats)
Spring Wheat (excluding durum) and spring barley
In The Prairie Provinces and Peace River Region of British Columbia Only.
For control of a wide spectrum of broadleaf weeds, including cleavers, GBX Herbicide may be tank mixed with 2,4-D Ester Herbicide and Refine Extra 75 DF Herbicide or Refine Extra 75 Toss-N-Go Herbicide or Refine SG Herbicide or Refine SG Toss-N-Go Herbicide. Apply GBX Herbicide at 0.16 L/ha tank mixed with Refine Extra 75 DF Herbicide or Refine Extra 75 Toss-N-Go Herbicide at 20 g/ha, or Refine SG Herbicide or Refine SG Toss-N-Go Herbicide at 30 g/ha, 2,4-D Ester Herbicide at 280 g a.e./ha (equal to 0.5 L/ha of 2,4-D Ester LV 600 or 0.42 L/ha of 2,4-D Ester LV 700) and a non-ionic surfactant (Agral 90, Ag-Surf or Citowett Plus) at 2 L per 1000 L of spray solution. A spray volume of 100 L/ha should be utilized. Apply postemergence when weeds are in the seedling up to 4-leaf/whorls stage, and when spring wheat (excluding durum) and spring barley are in the 4-leaf to flag-leaf stage. Do not apply to crops underseeded to legumes.

Mixing Instructions
Fill the tank to 1/3 full of clean water. With agitator running, add required amount of Refine Extra 75 DF Herbicide or, Refine Extra 75 Toss-N-Go Herbicide, or Refine SG Herbicide or Refine SG Toss-N-Go Herbicide and continue to agitate for a minimum of 5 minutes to ensure the Refine Extra 75 DF Herbicide, or Refine Extra 75 Toss-N-Go Herbicide, or Refine SG Herbicide or Refine SG Toss-N-Go Herbicide is completely dissolved. After it is fully dissolved add the GBX Herbicide with continuous agitation. Add the 2,4-D Ester herbicide and the rest of the water. Then add adjuvant. Use a spray volume of 100 L/ha.
Consult the 2,4-D label for additional application instructions and use precautions.

Preharvest/Grazing Intervals (GBX Herbicide + Refine Extra + 2,4-D Ester)
Allow 7 days between application and grazing of lactating dairy animals.
Do not harvest forage or cut hay within 30 days after application.
Remove meat animals from treated fields at least 3 days prior to slaughter.
Do not harvest the treated mature crop within 60 days after application.

TANK-MIX COMBINATION - GBX HERBICIDE + MCPA LV500 HERBICIDE OR MCPA LV600 HERBICIDE
For control of a wide spectrum of broadleaved weeds (see following table) apply GBX Herbicide at 0.31 L/ha tank mixed with MCPA LV500 Herbicide at 1.12 L/ha or MCPA LV600 Herbicide at 0.93 L/ha. Apply postemergence when weeds are in the seedling stage (2-4 leaf) and when spring wheat, durum wheat and spring barley are in the 3-leaf to flag-leaf stage. Application before the 3-leaf stage of wheat and barley may cause severe twisting of leaves and stem, and head deformities which may reduce yield up to 10%. Do not apply later than the flag-leaf stage. Do not apply to cereals underseeded with a legume.

Mixing Instructions
Add the correct amount of GBX Herbicide to spray tank 1/2 filled with water and agitate. Add the correct amount of MCPA LV500 Herbicide or MCPA LV600 Herbicide and continue to agitate.

Pre-Harvest/Grazing Intervals (GBX Herbicide + MCPA LV500 Herbicide or MCPA LV600 Herbicide)
Allow 7 days between application and grazing/cutting for hay.
Do not harvest the treated mature crop within 60 days after application.

TANK-MIX COMBINATIONS - GBX HERBICIDE + MCPA LV500 HERBICIDE or MCPA LV600 HERBICIDE + OTHER HERBICIDES (Do not apply to oats)
Tank mixtures of GBX Herbicide + MCPA LV500 Herbicide or MCPA LV600 Herbicide with other herbicides will provide control of additional weeds. For products which may be tank mixed with GBX Herbicide + MCPA LV500 Herbicide or MCPA LV600 Herbicide and the additional weeds controlled see following table. Follow all precautions, minimal interval to harvest and directions for use (including timing of application) on the GBX Herbicide and tank-mix partner labels.

BUFFER ZONES:
Use of the following spray methods or equipment DO NOT require a buffer zone: hand-held or backpack sprayer and spot treatment.
The buffer zones specified in the table below are required between the point of direct application and the closest downwind edge of sensitive terrestrial habitats (such as grasslands, forested areas, shelter belts, woodlots, hedgerows, riparian areas and shrublands), sensitive freshwater habitats (such as lakes, rivers sloughs, ponds, prairie potholes, creeks, marshes, streams, reservoirs and wetlands.
For tank mixes, consult the labels of the tank-mix partners and observe the largest (most restrictive) buffer zone of the products involved in the tank mixture and apply using the coarsest spray (ASAE) category indicated on the labels for those tank mix partners.

RESISTANCE MANAGEMENT RECOMMENDATIONS
For resistance management, GBX Herbicide is a Group 4 herbicide. Any weed population may contain or develop plants naturally resistant to GBX Herbicide and other Group 4 herbicides. The resistant biotypes may dominate the weed population if these herbicides are used repeatedly in the same field. Other resistance mechanisms that are not linked to site of action, but specific for individual chemicals, such as enhanced metabolism, may also exist. Appropriate resistance-management strategies should be followed.
To delay herbicide resistance:
Where possible, rotate the use of GBX Herbicide or other Group 4 herbicides within a growing season (sequence) or among growing season with different herbicide groups that control the same weeds in a field.
Use tank mixtures with herbicides from a different group when such use is permitted. To delay resistance, the less resistance-prone partner should control the target weed(s) as effectively as the more resistance-prone partner.
Have suspected resistant weed seeds tested by a qualified laboratory to confirm resistance and identify alternative herbicide options.
Contact your local extension specialist or certified crop advisors for any additional pesticide resistance-management and/or integrated weed-management recommendations for specific crops and weed biotypes.
For further information or to report suspected resistance, contact Dow AgroSciences Canada Inc. at 1-800-667-3852 or at www.dowagro.ca.
Herbicide use should be based on an integrated weed management program that includes scouting, historical information related to herbicide use and crop rotation, and considers tillage (or other mechanical control methods), cultural (for example, higher crop seeding rates; precision fertilizer application method and timing to favour the crop and not the weeds), biological (weed-competitive crops or varieties) and other management practices.
Monitor weed populations after herbicide application for signs of resistance development (for example, only one weed species on the herbicide label not controlled). If resistance is suspected, prevent weed seed production in the affected area if possible by an alternative herbicide from a different group.
Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment and planting clean seed.