3 min read
A pasture with a clear blue sky.

What hay species can I use Facet L on?

Facet L is labeled for most warm-season and cool- season established grasses grown for pasture and hay.

The cool-season grasses that Facet L is labeled on are:

  • meadow bromegraass
  • smooth bromegrass
  • smooth x meadow bromegrass
  • European dunegrass
  • fine fescue and tall fescue
  • Junegrass
  • Kentucky bluegrass
  • needle and thread
  • green needlegrass
  • orchardgrass
  • annual ryegrass
  • Indian ryegrass
  • perennial ryegrass
  • bluebunch wheatgrass
  • bluebunch wheatgrass X quack cross
  • crested wheatgrass
  • fairway wheatgrass
  • fairway X crested wheatgrass
  • intermediate wheatgrass
  • pubescent wheatgrass
  • Siberian wheatgrass
  • slender wheatgrass
  • tall wheatgrass
  • thickspike wheatgrass
  • Western wheatgrass
  • Altai wildrye
  • basin wildrye
  • beardless wildrye
  • Dahurian wildrye
  • mammoth wildrye
  • Russian wildrye

The warm season grasses that Facet L is labeled include:

  • bermudagrass
  • big bluestem
  • little bluestem
  • sand bluestem
  • buffalograss
  • Eastern gammagrass
  • blue gramma
  • side-oats gramma
  • Indiangrass
  • lovegrass
  • prairie sandreed
  • switchgrass

What is the recommended application timing?

Facet L should be applied early postemergence to small, actively growing weeds and grasses for optimum control. Allow seven days after application prior to cutting for hay (may graze immediately) so Facet L may translocate through plants effectively to provide control.

What is the recommended rate?

Facet L has an application rate range of 22 – 32 fl. oz./acre. However, 32 fl. oz. is the primary use rate necessary for consistent performance on tougher to control labeled broadleaf weeds and grasses.

What about sequential applications?

Sequential applications may be used, but no more than 64 fl. oz./acre may applied per year.

Do I need to add anything to Facet L to make it work better?

Crop oil concentrate (COC) at 2 pints/acre or 1 to 2 pints/acre of methylated seed oil (MSO) must be added to Facet L for better uptake and enhanced weed control. A nitrogen fertilizer source such as ammonium sulfate (AMS) or urea ammonium nitrate (UAN) can be added for better uptake and enhanced weed control. Facet L may be tank-mixed with other herbicides labeled for use in pasture unless prohibited by the other herbicide label.

The most restrictive label applies to tank mixes ie. adjuvant selection. For instance, when Facet L is tank mixed with other herbicides that restrict the use of oil additives, an 80% active nonionic spray surfactant (NIS) at 1 quart per 100 gallons and a nitrogen fertilizer source (AMS or UAN) must be used. However, this may limit the expected performance. Good moisture conditions and actively growing weeds is particularly necessary for Facet L to achieve the best weed control.

Can I use Faced L on newly established hayfields or pastures?

NO, Facet L is only labeled for established grass pastures.

Will this injure my forage grass like imazepic containing herbicides such as Plateau, Impose or Panoramic?

No, it is very safe on forage grasses in which it is labeled.

What are the grazing/haying restrictions for Facet L?

There are 0 days grazing and 7 day haying restriction regardless of rate on Facet L. The reason for this restriction is due to weed control since Facet L is a systemic herbicide which needs to translocate through the weeds to provide complete control.

What weeds does Facet L control?

Annual grass weeds controlled postemergence (POST) include:

  • barnyardgrass
  • junglerice
  • large crabgrass
  • broadleaf signalgrass
  • annual foxtails (green, giant, yellow)

Knotroot foxtail (Setaria parviflora) is a perennial, warm season grass. Currently, the most recommended herbicide treatments only provide suppression, not complete control and pastures show noticeable stunting and discoloration, particularly with bermudagrass. Facet L, however, has exhibited significant promise for Knotroot foxtail management in trials over the last several years. Additionally, virtually no pasture response has been observed.

The broadleaf weeds that Facet L controls include:

  • clovers
  • prickly lettuce
  • morningglory species
  • hemp sesbania

Facet L suppresses:

  • common and giant ragweed
  • Russian thistle
  • dandelion
  • sowthistle
  • Canada thistle

For best result broadleaf weeds and grasses should be 2 inches or less in height at the time of application.

Does Facet L have residual soil activity?

Yes, Facet L provides residual control and can be applied PRE before weeds emerge. However, POST applications to weeds are more effective and consistent.


Reviewed by Dr. Leanne Dillard, May 2019.

Did you find this helpful?