CutlessMEC

SePRO · EPA Reg 67690-51 · 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 CutlessMEC

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. 67690-51 — 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. 67690-51 →

Cutless MEC is a Class B turf growth regulator (PGR) used for growth management and quality improvement of turfgrasses. Its active ingredient is Flurpirimod at a concentration of 16.0% (containing 1.3 pounds of active ingredient per gallon). This product works by suppressing gibberellic acid biosynthesis to reduce leaf blade length and stem internode elongation, resulting in more compact, dense, and vigorous turf. It is used on various cool-season and warm-season turfgrasses, including Bentgrass, Kentucky Bluegrass, Perennial Ryegrass, Tall Fescue, Seashore Paspalum, Zoysiagrass, and Bermudagrass. It can also be used in programs to convert Poa annua (Annual Bluegrass) to perennial turfgrasses. Applications can be made via boom-type sprayer or mechanical agitation. Key handling notes include wearing protective eyewear, long-sleeved shirts, long pants, and shoes with socks. Avoid application during temperature inversions or when wind speeds exceed 10 mph. Do not apply to areas with surface water or intertidal areas. When mixing with Class A PGRs, specific tank-mix rates and intervals must be followed to ensure efficacy and safety.

Pests covered (2)

Turfgrass growth (regulation)Scale Insects

Areas treatable (1)

Turfgrasses (Bentgrass, Kentucky Bluegrass, Perennial Ryegrass, Tall Fescue, Seashore Paspalum, Zoysiagrass, Bermudagrass, etc.)

How to treat each type of area 1

Turfgrasses (Bentgrass, Kentucky Bluegrass, Perennial Ryegrass, Tall Fescue, Seashore Paspalum, Zoysiagrass, Bermudagrass, etc.)

Target pest	Location	Rate	Unit	Label notes
Turfgrass growth (regulation)	Outdoor	6 to 49	fl oz per acre	Used for growth management and quality improvement. Can be used for Poa annua conversion.

Mixing instructions 1

For pests	Label notes
Turfgrass growth regulation	Can be tank-mixed with Class A PGRs (e.g., trinexapac-ethyl or prohexadione-Ca) for enhanced suppression.

Worker safety

PPE required Protective eyewear; Long-sleeved shirt and long pants; Shoes plus socks.

Timing & weather

Do not apply during temperature inversions.
Do not apply when wind speeds exceed 10 mph.
Avoid application during periods of extreme temperature (heat or cold) or moisture stress.
Apply in spring following resumption of active seasonal growth; fall applications must be discontinued 4 weeks before onset of inactivity.

Use restrictions 9

Do not apply to shrubs, bedding plants, and/or food plants.
Do not apply to sod farms or turfgrasses grown for seed.
Do not apply to turf used for livestock production.
Do not apply to areas where Poa annua is the desired species or areas containing >80% Poa annua.
Do not apply to saturated soils or when significant moisture is anticipated.
Do not apply through any type of irrigation system.
Do not apply by aerial application.
In California, specific rates apply for Bermudagrass and Seashore Paspalum.
Do not apply to Bermudagrass (putting greens) in California.