CutrineUltra

SePRO · Copper 9% · EPA Reg 67690-98 · Insecticide Document last checked 2026-05-30

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. 67690-98 →

Cutrine® Ultra is an algaecide, herbicide, and cyanobactericide used to control various types of algae and certain aquatic plants. Its active ingredient is a Copper ethanolamine Complex, which provides 0.9 lbs of elemental copper per gallon. It is designed for use in diverse water bodies including lakes, rivers, potable water reservoirs, farm/fish ponds, irrigation systems, and stormwater detention ponds. The product controls planktonic (suspended) algae, filamentous (mat-forming) algae, benthic (bottom-growing) algae, and specific rooted aquatic plants like Hydrilla verticillata and Egeria densa. Application methods include surface spray/injection, slow-flowing or quiescent water applications, and drip systems for irrigation conveyance systems. When using the drip system, the product helps prevent clogging of headgates and suction screens. Users should note that copper levels must be managed to avoid environmental hazards to aquatic organisms. Handling requires specific PPE, including long-sleeve shirts, long pants, socks, shoes, and goggles or a face shield. Always follow specific dilution and application rate charts provided in the label for the specific water depth and algae density to ensure effective control and safety.

Pests covered (1)

Planktonic algae, Cyanobacteria, Filamentous algae, Benthic algae, Hydrilla verticillata, Egeria densa

Areas treatable (1)

Lakes, rivers, potable water reservoirs, farm/fish ponds, golf courses, industrial/irrigation/recreational/stormwater ponds, hatcheries, raceways, and irrigation conveyance systems

How to treat each type of area 1

Lakes, rivers, potable water reservoirs, farm/fish ponds, golf courses, industrial/irrigation/recreational/stormwater ponds, hatcheries, raceways, and irrigation conveyance systems

Varies

Target pest	Location	Rate	Unit	Dilution	Label notes
Planktonic algae, Cyanobacteria, Filamentous algae, Benthic algae, Hydrilla verticillata, Egeria densa	Outdoor	Varies based on algae density and water depth	PPM (Parts Per Million) copper	Varies; see Table 1 and Table 2	Check local regulations for use in public waters.

Mixing instructions 1

For pests	Location	Amount	Per	Finished strength	Label notes
General Algae Control	Outdoor	See Table 1	Per Acre-Foot	Target PPM copper	Use Table 1 to determine copper concentration based on algae growth density.

Worker safety

PPE required Long-sleeve shirt, long pants, socks, shoes, goggles or face shield, and rubber gloves. Wear protective eyewear, clothing, and chemical-resistant gloves.

Timing & weather

Calm and sunny conditions with water temperature at least 60°F will expedite control.
Avoid application if heavy infestation requires treatment only at 1/3 to 1/2 of water body volume to prevent oxygen depletion.

Use restrictions 4

Do not use in water containing trout if carbonate hardness does not exceed 50 ppm.
Do not use in small volume, garden pond systems.
Do not apply in a way that will contact adults, children, or pets.
Do not exceed 1.0 ppm copper concentration in treated water.

Label SDS

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Document text and citations

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Reference only. Always read and follow the most current EPA-approved label on the product container. State and local restrictions may apply that are not reflected in this digitised copy. Verify the EPA registration number and revision date before use.