Canada

Flexstar GT

registration_expired
SYNGENTA - herbicide
30412

For non-selective burndown of annual and perennial grasses and broadleaf weeds and residual control of redroot pigweed and common ragweed in glyphosate-tolerant soybeans.

PRODUCT INFORMATION
FLEXSTAR GT Herbicide may be applied pre-plant or pre-emergent to the crop in soybeans or as a post-emergence over-the-top application in glyphosate tolerant soybeans.
FLEXSTAR GT Herbicide provides burndown of many emerged annual and perennial grasses and broadleaf weeds and residual control of redroot pigweed and common ragweed in soybeans. FLEXSTAR GT Herbicide should be applied under favorable environmental conditions that promote active weed growth. Avoid application to weeds that have been subjected to certain stress conditions such as cold temperatures, excessive moisture, drought, injury from hail or from prior herbicide applications. Avoid application to glyphosate-tolerant soybeans which may have been subjected to such stress conditions. Extremely cool or cloudy weather at treatment time may slow down activity of this product and delay visual effects of control. Some bronzing, crinkling or spotting of the glyphosate-tolerant soybeans may occur, but plants normally outgrow these effects with no adverse effects on maturity or crop yield.
Moisture is necessary to activate FLEXSTAR GT Herbicide for residual weed control. Dry weather following application of FLEXSTAR GT Herbicide may reduce effectiveness.
FLEXSTAR GT Herbicide activity is unaffected by rain falling 4 hours after application.

DIRECTIONS FOR USE
Use clean (non-turbid) water for spraying FLEXSTAR GT Herbicide. Muddy water will reduce the effectiveness of FLEXSTAR GT Herbicide. Poor control may also occur when treating weeds heavily covered with dust.
Avoid contact with desirable vegetation by direct application or spray drift as destruction may result.
Avoid drift or overspray to non-target vegetation and wildlife habitats.
Apply using ground equipment only.
DO NOT APPLY BY AIR.
Do not apply when wind velocity is greater than 15 km/h.
Do not apply FLEXSTAR GT Herbicide to any field more often than once every two years.
Mix only the amount of solution to be used during a one-day period, as reduced activity may result from use of leftover solution.
Drain and clean application equipment immediately after using this product.
Do not contaminate water sources by disposal of waste or cleaning of equipment.

TIMING OF APPLICATION
FLEXSTAR GT Herbicide may be applied surface pre-plant (up to 7 days before planting) or pre- emergent to the crop in soybeans or as a post-emergence over-the-top application in glyphosate tolerant soybeans.
Glyphosate-tolerant soybeans are tolerant to FLEXSTAR GT Herbicide application made to plants in the 1 to 2 trifoliate leaf stage. Apply FLEXSTAR GT Herbicide when weeds are small and actively growing. Application should be made when the main flush of weeds is complete and the majority of the weeds are at the cotyledon to 3 or 4 true leaf stage.

ANNUAL WEEDS- Burndown
Annual Grasses
Barnyard Grass
Bluegrass (annual)
Crabgrass (large, smooth)
Downy Brome
Fall Panicum
Giant Foxtail
Green Foxtail
Persian Darnel
Rye, tame
Volunteer Barley
Volunteer Corn
Wild Oats
Proso Millet
Volunteer Wheat
Yellow Foxtail
Annual Broadleaf Weeds
Chickweed, common
Cleavers
Cocklebur
Corn Spurry
Cow Cockle
Dodder
Fleabane (Canada)
Flixweed
Green Smartweed
Hairy Galinsoga
Hemp nettle
Kochia
Lady's-Thumb
Lamb's-Quarters
Low Cudweed
Narrow-Leaved Hawk's-Beard
Narrow-Leaved Vetch
Night-Flowering Catchfly
Nightshade, Eastern black
Volunteer canola
Pennsylvania Smartweed
Prickly Lettuce
Russian Thistle
Prostrate Knotweed
Round-Leaved Mallow
Shepherd's-Purse
Smooth Pigweed
Sowthistle (annual)
Stinkweed
Stork’s Bill
Volunteer Flax
Wild Buckwheat
Wild Mustard
Wild Tomato
Wormwood (Absinth)
Velvetleaf

PERENNIAL WEEDS- Burndown
Perennial Grasses/Sedges
Blue Grass (Canada)
Blue Grass (Kentucky)
Bromegrass (smooth)
Cattail (common)
Foxtail Barley
Orchard Grass
Quack Grass
Redtop
Wirestem muhly
Yellow Nutsedge
Perennial Broadleaved Weeds
Alfalfa
Chickweed, mouse-eared
Clover, white
Colt’s-Foot
Cottontop
Curled Dock
Dandelion, common
Field Bindweed
Goldenrod, Canada
Hemp Dogbane
Hoary Cress
Horsetail
Jerusalem Artichoke
Knotweed (Japanese)
Milkweed (common)
Plantain, broad-leaved
Poison Ivy
Purple Loosestrife
Sheep Sorrel
Smooth Bedstraw
Sowthistle (perennial)
Stitchwort, grass-leaved
Thistle (Canada)
Yellow Toadflax
Wild Carrot
Wild Grape

ANNUAL WEEDS- Residual Control
Annual Broadleaf Weeds
Ragweed (common)
Redroot Pigweed

APPLICATION RATES
When applying FLEXSTAR GT Herbicide, it is essential to achieve good coverage and ample penetration of the foliage in order to obtain acceptable weed control. As glyphosate kills weeds by affecting the root system, visible effects may take 7 to 10 days to occur.
Do not apply more than once per season and to any field only every second year.
Under stress conditions and for larger weeds, addition of TURBOCHARGE is required at 0.25% v/v of spray solution.
NOTE: Always use pedigreed (i.e. certified) glyphosate tolerant soybean varieties. Soybeans which are not designated as glyphosate tolerant will be damaged or destroyed by this treatment.
DO NOT HARVEST GLYPHOSATE-TOLERANT SOYBEANS WITHIN 90 DAYS OF APPLICATION OF FLEXSTAR GT HERBICIDE.
CAUTION: Do not graze the treated crop or cut for hay; sufficient data are not available to support such use.

Geography - Eastern Canada
Rate of FLEXSTAR GT Herbicide - 3.5 L/ha
Rate of TOUCHDOWN TOTAL Herbicide - N/A
Spray timing - Pre-plant surface (up to 7 days before planting) or pre-emergence application before crop emergence OR Early post-emergent (1-2 trifoliate leaf stage) (glyphosate tolerant soybeans only)
Rate of water - 150 – 200 L/ha
Rate of TURBOCHARGE (1) - 0.25% v/v
OTHER - Apply at a pressure of 210 – 420 kPa. Do not apply at pressures which exceed 420 kPa. See “Tank Mixing Instructions” below for further information.

Geography - Red River Valley of Manitoba
Rate of FLEXSTAR GT Herbicide - 2.1 L/ha
Rate of TOUCHDOWN TOTAL Herbicide - 0.7 – 2.46 L/ha
Spray timing - Early post-emergent (1-2 trifoliate leaf stage) (glyphosate tolerant soybeans only)
Rate of water - 150 – 200 L/ha
Rate of TURBOCHARGE (1) - 0.25% v/v
OTHER - Apply at a pressure of 210 – 420 kPa. Do not apply at pressures which exceed 420 kPa. See “Tank Mixing Instructions” below for further information. Will not provide residual control of common ragweed or redroot pigweed.
(1) Use TURBOCHARGE only under stress conditions and for larger weeds

TANK MIXING INSTRUCTIONS:
1. Fill the spray tank with 1/2 the required amount of water.
2. Add TURBOCHARGE at 0.25% v/v, if required, and agitate to ensure complete mixing.
3. Fill the spray tank to 3/4 the required amount of water.
4. Add FLEXSTAR GT Herbicide and agitate to ensure complete mixing.
5. Add TOUCHDOWN TOTAL Herbicide.
6. Finish filling the spray tank with water, maintaining gentle agitation.

ROTATIONAL CROPPING INFORMATION
FLEXSTAR GT Herbicide can remain active in the soil for several months after application and the residues of FLEXSTAR GT Herbicide present potential carry-over damage to certain crops.
Refer to the table below for a list of crops that may be seeded following an application of FLEXSTAR GT Herbicide at the recommended rate of 3.5 L/ha. Prior to seeding any crop that is not listed including sweet corn, a field bioassay should be conducted. A field bioassay involves seeding a test strip of the crop(s) intended for production the following year and growing the crop(s) to maturity.

Crop to be Planted / Minimum Rotation Interval (Months After Last FLEXSTAR GT Herbicide Application):
Winter Wheat – 4
Spring Wheat – 10
Soybeans, dry edible beans, field corn – 10
All other crops – Bioassay

Field Bioassay: Select an area in the field previously treated with FLEXSTAR GT Herbicide which most closely approximates the soil conditions of the field as a whole. Test strips should be seeded perpendicular to the direction in which the site was sprayed using standard seeding equipment and following normal cultivation practices. Strips of sufficient length to transect several spray swaths should be seeded to the crops intended for later planting. Reliability of the bioassay results will increase with the number and length of the test strips used. A check strip in an adjacent, untreated area should also be seeded for comparison purposes.
Examine the test strips for possible germination or stand reductions and other symptoms of injury such as colour, vigour and height. Should results of the bioassay suggest that germination or plant development is affected by residues of FLEXSTAR GT Herbicide, do not seed until a future bioassay indicates that growth of the crop is normal.

ENVIRONMENTAL PRECAUTIONS
A 15 m buffer zone is 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) and estuarine/marine habitats.
HARMFUL to aquatic organisms. Avoid direct application to any body of water populated with fish or used for domestic purposes. Do not use in areas where adverse impact on domestic water or aquatic species is likely. Do not contaminate water by disposal of waste or cleaning of equipment. Avoid all drift to or contact with other vegetation for which treatment is not intended as damage or destruction may occur.

PHYSICAL AND CHEMICAL HAZARDS
Spray solutions of FLEXSTAR GT Herbicide should be mixed, stored and applied only in stainless steel, fibreglass, plastic and plastic-lined steel containers.
DO NOT MIX, STORE OR APPLY FLEXSTAR GT HERBICIDE OR SPRAY SOLUTIONS OF FLEXSTAR GT HERBICIDE IN GALVANIZED STEEL OR UNLINED STEEL (EXCEPT STAINLESS STEEL) CONTAINERS OR SPRAY TANKS. FLEXSTAR GT Herbicide or spray solutions of FLEXSTAR GT Herbicide react with such containers and tanks to produce hydrogen gas, which may form a highly combustible gas mixture. This gas mixture could flash or explode, causing serious personal injury, if ignited by open flame, spark, welder's torch, lighted cigarette or other ignition source.

RESISTANT-MANAGEMENT RECOMMENDATIONS
For resistance management, FLEXSTAR GT Herbicide is a Group 9 and 14 herbicide. Any weed population may contain or develop plants naturally resistant to FLEXSTAR GT Herbicide and other Group 9 or 14 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 FLEXSTAR GT Herbicide or other Group 9 and 14 herbicides 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.
Herbicide use should be based on an IPM program that includes scouting, historical information related to herbicide use and crop rotation, and considers tillage (or other mechanical), cultural, biological and other chemical control practices.
Monitor treated weed populations for resistance development.
Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment and planting clean seed.

Approved provinces - MB, NB, NS, ON, PE, QC

Effective
Crops
Soybeans
BBCH
0 - 0
Registred norm
2.1 - 3.5
Preharvest Interval
-
Crops
Glyphosate
BBCH
0 - 0
Registred norm
2.1 - 3.5
Preharvest Interval
-
Effective
Annual bluegrass
Annual bluegrass
Poa annua ★★★
Barnyard grass
Barnyard grass
Echinochloa crus galli ★★★
Black bindweed
Black bindweed
Fallopia convolvulus ★★★
Broadleaf plantain
Broadleaf plantain
Plantago major ★★★
Brome grass
Brome grass
Bromus inermis ★★★
Canada blue grass
Canada blue grass
Poa compressa ★★★
Canada goldenrod
Canada goldenrod
Solidago canadensis ★★★
Canada thistle
Canada thistle
Cirsium arvense ★★★
Cattails
Cattails
Typha latifolia ★★★
Cleavers
Cleavers
Galium aparine ★★★
Cocklebur
Cocklebur
Xanthium strumarium ★★★
Cock's-foot
Cock's-foot
Dactylis glomerata ★★★
Coltsfoot
Coltsfoot
Tussilago farfara ★★★
Common chickweed
Common chickweed
Stellaria media ★★★
Common dandelion
Common dandelion
Taraxacum officinale ★★★
Common hempnettle
Common hempnettle
Galeopsis tetrahit ★★★
Common redtop
Common redtop
Agrostis gigantea ★★★
Corn spurrey
Corn spurrey
Spergula arvensis ★★★
Cottontop
Cottontop
Digitaria californica ★★★
Cow cockle
Cow cockle
Vaccaria hispanica ★★★
Crabgrass
Crabgrass
Digitaria ischaemum ★★★
Curly dock
Curly dock
Rumex crispus ★★★
Docks
Docks
Rumex acetosella ★★★
Dodder
Dodder
Cuscuta ★★★
Downy brome
Downy brome
Bromus tectorum ★★★
Eastern black nightshade
Eastern black nightshade
Solanum ptychanthum ★★★
European bindweed
European bindweed
Convolvulus arvensis ★★★
Fall panicum
Fall panicum
Panicum dichotomiflorum ★★★
Fat hen
Fat hen
Chenopodium album ★★★
Field horsetail
Field horsetail
Equisetum arvense ★★★
Fleabane
Fleabane
Conyza canadensis ★★★
Flixweed
Flixweed
Descurainia sophia ★★★
Foxtail
Foxtail
Setaria faberi ★★★
Foxtail barley
Foxtail barley
Hordeum jubatum ★★★
Green foxtail
Green foxtail
Setaria viridis ★★★
Green smartweed
Green smartweed
Polygonum scabrum ★★★
Hairy galinsoga
Hairy galinsoga
Galinsoga quadriradiata ★★★
Hoary cress
Hoary cress
Lepidium draba ★★★
Japanese knotweed
Japanese knotweed
Fallopia japonica ★★★
Jerusalem artichoke
Jerusalem artichoke
Helianthus tuberosus ★★★
Jimson weed
Jimson weed
Datura stramonium ★★★
Kentucky bluegrass
Kentucky bluegrass
Poa pratensis ★★★
Kochia
Kochia
Bassia scoparia ★★★
Lucerne
Lucerne
Medicago sativa ★★★
Marsh cudweed
Marsh cudweed
Gnaphalium uliginosum ★★★
Milkweed
Milkweed
Euphorbia heterophylla ★★★
Mouse ear chickweed
Mouse ear chickweed
Cerastium fontanum ★★★
Narrowleaf hawksbeard
Narrowleaf hawksbeard
Crepis tectorum ★★★
Night flowering catchfly
Night flowering catchfly
Silene noctiflora ★★★
Pennsylvania smartweed
Pennsylvania smartweed
Polygonum pensylvanicum ★★★
Perennial sow thistle
Perennial sow thistle
Sonchus arvensis ★★★
Persian darnel
Persian darnel
Lolium persicum ★★★
Poison ivy
Poison ivy
Toxicodendron radicans ★★★
Prickly lettuce
Prickly lettuce
Lactuca serriola ★★★
Prostrate knotweed
Prostrate knotweed
Polygonum aviculare ★★★
Purple loosestrife
Purple loosestrife
Lythrum salicaria ★★★
Quackgrass
Quackgrass
Elytrigia repens ★★★
Redstem filaree
Redstem filaree
Erodium cicutarium ★★★
Round-leaved mallow
Round-leaved mallow
Malva pusilla ★★★
Russian thistle
Russian thistle
Salsola kali ★★★
Rye
Rye
Secale cereale ★★★
Shepherd's purse
Shepherd's purse
Capsella bursa-pastoris ★★★
Slim amaranth
Slim amaranth
Amaranthus hybridus ★★★
Smooth bedstraw
Smooth bedstraw
Galium mollugo ★★★
Smooth sowthistle
Smooth sowthistle
Sonchus oleraceus ★★★
Spotted ladysthumb
Spotted ladysthumb
Polygonum persicaria ★★★
Stitchwort
Stitchwort
Stellaria graminea ★★★
Tares
Tares
Vicia sativa ★★★
Velvetleaf
Velvetleaf
Abutilon theophrasti ★★★
Volunteer barley
Volunteer barley
Hordeum vulgare ★★★
Volunteer canola
Volunteer canola
Brassica napus ★★★
Volunteer corn
Volunteer corn
Zea mays ★★★
Volunteer flax
Volunteer flax
Linum usitatissimum ★★★
Volunteer wheat
Volunteer wheat
Triticum aestivum ★★★
White clover
White clover
Trifolium repens ★★★
Wild carrot
Wild carrot
Daucus carota ★★★
Wild grape
Wild grape
Vitis labrusca ★★★
Wild mustard, charlock
Wild mustard, charlock
Sinapis arvensis ★★★
Wild oat
Wild oat
Avena fatua ★★★
Wild proso millet
Wild proso millet
Panicum miliaceum ★★★
Wild tomato
Wild tomato
Solanum lycopersicum ★★★
Wirestem muhly
Wirestem muhly
Muhlenbergia frondosa ★★★
Wormwood (Absinth)
Wormwood (Absinth)
Artemisia absinthium ★★★
Yellow nutsedge
Yellow nutsedge
Cyperus esculentus ★★★
Yellow toadflax
Yellow toadflax
Linaria vulgaris ★★★
Common ragweed
Common ragweed
Ambrosia artemisiifolia ★★
Redroot pigweed
Redroot pigweed
Amaranthus retroflexus ★★