Cutless50W

SePRO · EPA Reg 67690-15 · Plant Growth Regulator Document last checked 2026-05-30

About this product

Active ingredient Pending extraction

Manufacturer SePRO

Category Plant Growth Regulator

Full details for Cutless50W

Source product label ↗ Open the catalog source label while the local copy is reviewed. Verify the product name, EPA registration number, and revision before use. Source safety data sheet ↗ Open the catalog source SDS while the local copy is reviewed. Verify the exact product and revision before relying on it. EPA registration data Reg. 67690-15 — registry reference, signal word and status.

Applicator discussion

Nothing here is label direction — the label is the law. These are notes from other applicators, moderated before they appear. Check the labeling accompanying the product and applicable state requirements.

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According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 67690-15 →

Cutless 50W is a Class B plant growth regulator (PGR) used for growth management and quality improvement of various turfgrasses. Its active ingredient is Flurpirimod at a concentration of 50.0%. It works by suppressing gibberellic acid biosynthesis to result in a more compact growth form, increased turfgrass density, and improved wear resistance. It is suitable for both cool-season turfgrasses (like bentgrass, Kentucky Bluegrass, and perennial ryegrass) and warm-season turfgrasses (like seashore paspalum, bermudagrass, and zoysia). Applications are made via boom-type sprayers, with rates varying significantly by turf species and whether it is being tank-mixed with Class A PGRs. For example, bentgrass typically requires 4-16 oz. per acre. The product can be tank-mixed with compatible pesticides and foliar nutrient products. Key handling notes include wearing long-sleeved shirts, long pants, shoes plus socks, and chemical-resistant gloves. Avoid application during temperature inversions or high winds to prevent spray drift. Do not apply directly to water or areas where surface water is present. Always allow for sufficient mixing time to ensure complete dispersion.

Pests covered (1)

Scale Insects

Areas treatable (1)

Turfgrass

How to treat each type of area 1

Turfgrass

Location	Rate	Unit	Dilution	Label notes
Outdoor	4-16	oz. per acre	N/A	Rates vary by species; see Table 1 for specific details.

Mixing instructions 1

Label notes
Can be tank-mixed with compatible pesticides and foliar nutrient products. Test compatibility before use.

Worker safety

PPE required Long-sleeved shirt and long pants; Shoes plus socks; Chemical-resistant gloves (such as natural rubber or barrier laminate).

Timing & weather

Avoid application during temperature inversions.
Avoid application when wind speeds exceed 10 mph.
Avoid application during prolonged periods of temperature (heat or cold) or moisture stress.

Use restrictions 7

Do not use on turf being grown for sale or other commercial use as sod, or for commercial seed production, or for research purposes.
Do not apply to shrubs, bedding plants, and/or food plants.
Do not apply to saturated soils or where significant moisture event is anticipated.
Do not apply to areas where Poa annua is the desired turf species or areas containing >80% Poa annua.
Do not apply to turf used for livestock production.
Do not apply via any type of irrigation system.
Do not apply by aerial application.