Frontline XL

Dow AgroSciences
Registered until
Registration number
Active materials


Frontline XL Herbicide is a selective postemergence herbicide for the control of hard-to-kill annual broadleaved weeds such as chickweed and cleavers in spring wheat (including durum), spring barley (not underseeded with legumes) and oats. Frontline XL Herbicide is mixed with water and applied as a uniform broadcast spray.
Frontline XL Herbicide MUST be applied early postemergence, to the main flush of actively growing broadleaved weeds. Warm, moist growing conditions promote active weed growth and enhance the activity of Frontline XL Herbicide by allowing maximum foliar uptake and contact activity. Weeds hardened off by cold weather or drought stress may not be adequately controlled or suppressed and re-growth may occur. For best results, ensure thorough spray coverage of target weeds. See “DIRECTIONS FOR USE” section of this label for complete use details.
Frontline XL Herbicide stops growth of susceptible weeds rapidly. However, typical symptoms (discolouration) of dying weeds may not be noticeable for 1 to 2 weeks after application, depending upon growing conditions and weed susceptibility. Degree of control and duration of effect are dependent on weed sensitivity, weed size, crop competition, growing conditions at and following treatment, and spray coverage.


Frontline XL Herbicide contains a Group 2 and a Group 4 mode of action herbicide. The Group 2 mode of action herbicide inhibits the production of the ALS enzyme in plants. This enzyme is essential for the production of certain amino acids required for plant growth. The Group 4 mode of action herbicide disrupts normal plant growth regulation resulting in death of susceptible plants.



Sensitive Plants
Do not apply Frontline XL 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 Frontline XL Herbicide can be seeded the following year to barley, canola, chickpeas, corn, field beans, flax, Juncea canola, lentils, mustard (brown, oriental and/or yellow), oats, peas, potatoes (except seed potatoes), soybeans, sunflowers, or wheat or fields can be summerfallowed.
This product has potential to leach. Do not apply excessive irrigation. Do not use in successive years at the same site.

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 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 Canada Inc.

Spray Equipment Precaution

Do not apply through any type of irrigation system.

To Reduce Spray Drift:

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

Sprayer clean-out

To avoid injury to desirable plants, thoroughly clean equipment used to apply this product before re-use or using it to apply other chemicals.
1. Immediately after spraying, completely drain the sprayer tank. Any contamination on the outside of the spraying equipment should be removed by washing with clean water.
2. First rinse:
Spray the inside of tank with clean water and fill the sprayer with at least one tenth of the spray tank volume.
Agitate and circulate for 15 minutes, and flush through booms and hoses.
Remove end caps or open ball valves on the ends of each boom section, and flush solution through the boom ends to ensure there is no spray solution trapped between the boom end and the nozzles.
Drain tank completely.
3. Second rinse:
Fill the tank with clean water.
Add All Clear Spray Tank Decontaminator plus 1 L of household ammonia (containing a minimum of 3 % ammonia) per 100 L of water as per manufacturer’s recommendations while filling the tank with clean water.
Agitate and then flush the boom and hoses with the cleaning solution. Top up with water making sure the tank is completely full. Allow to stand for 15 minutes with agitation. Flush the solution out of the spray tank through the spray booms. Remove end caps or open ball valves on the ends of each boom section, and flush solution through the boom ends to ensure there is no spray solution trapped between the boom end and the nozzles.
If possible, let the solution stand in the sprayer tank and booms for an extended period of time, overnight if possible.
After flushing the boom and hoses, drain tank completely.
Remove nozzles and screens and clean separately with a cleaning agent or an ammonia solution (100 mL in 10 L water).
If switching to spray crops sensitive to Frontline XL herbicide, it is recommended to repeat the second rinse procedure.
4. Third rinse:
Rinse the tank with clean water and flush through the boom and hoses using at least one tenth of the spray tank volume.
Remove end caps or open ball valves on the ends of each boom section, and flush solution through the boom ends to ensure there is no spray solution trapped between the boom end and the nozzles.
Drain tank completely.

Do not use ammonia with chlorine bleach. Using ammonia with chlorine bleach will release a gas with a musty chlorine odour which may cause eye, nose, throat, and lung irritation. Do not clean equipment in an enclosed area.


Field sprayer application

DO NOT apply during periods of dead calm. Avoid application of this product when winds are gusty. DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) coarse classification. Boom height must be 60 cm or less above the crop or ground.

Maximum 1 application per year.

Spring wheat (including durum), spring barley and oats.

Application Rate
For control of a wide spectrum of broadleaved weeds, apply a uniform spray containing 1.25 L/ha of Frontline XL Herbicide in a minimum of 100 L of water per hectare to thoroughly cover the weeds. Apply to actively growing wheat, barley, and oats from the 2 leaf expanded to 6 leaf stage. Apply when weeds are actively growing. Only weeds emerged at the time of treatment will be controlled. Best results are obtained from applications made to seedling weeds.

Mixing Instructions

1. Fill sprayer tank 1/2 full of water
2. Start sprayer tank agitation
3. Add the required amount of Frontline XL Herbicide
4. Complete filling the sprayer tank with sufficient water to spray 100 L of spray mixture per hectare
5. Follow sprayer directions and precautions as outlined above, especially when applying next to sensitive crops (e.g. canola and legumes)
6. Follow sprayer clean-up directions

Note: Do not add a surfactant to this tank mixture.

Weeds Controlled or Suppressed
Weeds Controlled: buckwheat wild, hempnettle***, prickly lettuce**, burdock**, lamb’s quarters, ragweed common, canola volunteer*, mustard ball, shepherd’s purse,  Chickweed common, mustard wild, smartweed, cleavers, pigweed redroot***, stinkweed, cow cockle, pigweed Russian**, sunflower, annual**, flixweed (2-4 leaf stage)
Weeds Suppressed:
dandelion (seedlings and overwintered rosettes less than 15 cm)***, sowthistle perennial, stork's bill, plantain (top growth), Canada thistle***, sowthistle annual, narrow-leaved hawk’s beard

*Including all herbicide-tolerant canola varieties
**Up to the 4 leaf stage
***Optimum control can be achieved with the addition of 70 g a.e./ha MCPA Ester.

Pre-Harvest/Grazing Intervals
Do not harvest the treated crop within 60 days after application.
Do not permit lactating dairy animals to graze fields within 7 days after application.
Do not harvest forage or cut hay within 7 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.

Restricted Entry Interval (REI)
Re-entry is not permitted until 12 hours after application for all agricultural scenarios unless otherwise indicated.

Crops Registered: spring wheat (including durum) and spring barley

Do not apply these tank mixes to oats.

Tank mixtures of Frontline XL Herbicide with other herbicides will provide control of broadleaved weeds and specified annual grasses. Apply when crops and weeds are actively growing. Only weeds emerged at the time of treatment will be controlled. Best results are obtained from applications made to seedling weeds. Follow all precautions, minimum interval to harvest and directions for use on the Frontline XL Herbicide and tank-mix partner labels.

Mixing Instructions
1. Fill sprayer tank 1/2 full of water.
2. Start sprayer tank agitation.
3. Add the required amount of Frontline XL Herbicide and continue to agitate.
4. Add the required amount of tank-mix partner.
5. Fill the sprayer tank with sufficient water to spray 100 L of spray mixture per hectare.
Add only the adjuvant recommended below. Follow tank-mix partner label for order of mixing.

Tank-Mix Combinations with Frontline XL Herbicide

Herbicide Tank-Mix Partner: Assert 300 SC Herbicide

Crops Registered: wheat (spring & durum), spring barley
Rate (Product/ha): 1.6 L
Adjuvant and Rate: Refer to the Assert 300 SC label
Additional Weeds Controlled: wild oat

Herbicide Tank-Mix Partner: Horizon 240 EC Herbicide
Crops Registered: wheat (spring & durum)
Rate (Product/ha): 230 mL
Adjuvant and Rate: Score 0.8% v/v
Additional Weeds Controlled: wild oat
Rate (Product/ha): 290 mL
Adjuvant and Rate: Score 1.0% v/v
Additional Weeds Controlled: wild oat and green foxtail

Herbicide Tank-Mix Partner: Everest 2.0 Herbicide*†
Crops Registered: wheat (spring & durum)
Rate (Product/ha): 36-72 mL/ha
Adjuvant and Rate: Non-ionic surfactant (see label) 0.25% v/v
Additional Weeds Controlled: wild oat and green foxtail

Herbicide Tank-Mix Partner: Axial 100 EC Herbicide
Crops Registered: spring wheat and barley
Rate (Product/ha): 600 mL
Adjuvant and Rate: Adigor 700 mL/ha
Additional Weeds Controlled: wild oats, green foxtail, yellow foxtail, volunteer oats, volunteer canary seed, proso millet

Herbicide Tank-Mix Partner: Simplicity
Crops Registered: wheat (spring & durum)
Rate (Product/ha): 500 mL
Adjuvant and Rate: Not required
Additional Weeds Controlled: wild oats, barnyard grass, Japanese brome, hempnettle**, redroot pigweed**

†For conditions for when to use the higher rates, refer to the Everest 2.0 Herbicide label.
*Wheat (including durum) exposed to water-logged or saturated soils, or temperature extremes such as heat or freezing weather, or drought, low fertility or plant disease at application time could show unacceptable injury symptoms. Weed control may also be reduced by these same conditions.
**Additional MCPA not required

Green foxtail control may be reduced with a tank-mix application of Frontline XL Herbicide and Axial 100 EC Herbicide. For optimum control of green foxtail, make separate applications of Axial 100 EC Herbicide and Frontline XL Herbicide.

NOTE TO USER: READ THE FOLLOWING BEFORE USING THIS PRODUCT FOR THE INDICATED SPECIAL USE APPLICATIONS: The DIRECTIONS FOR USE for this product for the use(s) described below were developed by persons other than Dow AgroSciences Canada Inc. and accepted for registration by Health Canada under the User Requested Minor Use Label Expansion program. Dow AgroSciences Canada Inc. itself makes no representation or warranty with respect to performance (efficacy) and/or crop tolerance (phytotoxicity) claims for this product when used on the crop(s) listed below.

Accordingly, the Buyer and User assume all risks related to performance and crop tolerance arising, and agrees to hold Dow AgroSciences Canada Inc. harmless from any claims based on efficacy and/or phytotoxicity in connection with the use(s) described on this label.



Application Rate: Apply 1.25 L/ha in a minimum of 100 L water/ha. Apply from the 2-leaf expanded stage in seedling Timothy or in the spring on established Timothy. Apply one posteemergent application when weeds are small and actively growing by ground application only.
Do not cut treated crop for hay or graze treated crop within 7 days after application.
Refer to the main Frontline XL Herbicide label for additional details and instructions before using.

Buffer zones are not required for applications with handheld equipment.
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) and estuarine/marine habitats.

Buffer Zone Table
Method of application: Field sprayer
Crop: Cereals, Timothy (seedling or established)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 5
Greater than 1 m: 5 
Estuarine/Marine Habitats of Depths:
Less than 1 m: 5
Greater than 1 m: 5
Terrestrial habitat: 30

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.

NOTE: Applicators may recalculate a site-specific buffer zone by combining information on current weather conditions and spray configuration for the following applications: all airblast applications, and for field and aerial applications which specify the following droplet size category wording on the product label: ‘DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) [Fine or Medium or Coarse] classification.’ To access the Buffer Zone Calculator, please visit the Pest Management Regulatory Agency web site.

For resistance management, please note that Frontline XL Herbicide is both a Group 2 and a Group 4 herbicide. Any weed population may contain or develop plants naturally resistant to Frontline XL Herbicide and to other Group 2 and/or to 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 Frontline XL Herbicide or other Group 2 or Group 4 herbicide within a growing season (sequence) or among growing seasons 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.
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 when moving between fields, and planting clean seed.
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.

NOTICE TO USER: This pest control product is to be used only in accordance with the directions on the label. It is an offence under the Pest Control Products Act to use this product in a way that is inconsistent with the directions on the label. The user assumes the risk to persons or property that arises from any such use of this product.

Registered for culturesRateBBCHPreharvest Interval
Winter wheat1.25 l2 - 660
Spring wheat1.25 l2 - 660
Spring barley1.25 l2 - 660
Winter oats1.25 l2 - 660
Spring oats1.25 l2 - 660