Cutrine Plus Algaecide, manufactured by Applied Bio Chemists, is a effective double chelated algaecide formula that controls algae and hydrilla water plants on the top of water in large bodies of water like lakes. This product is not to be confused for its granular form Cutrine Plus Granular Algaecide, which is more effective against submerged algae and aquatic weeds in smaller application sites.

With its double chelated formula this liquid algaecide prevents the precipitation of copper with carbonates and bicarbonates in water. In short, meaning this product moves more easily in water that has a high mineral content.

Cutrine Plus Algaecide provides fast results on most hard-to-kill algae or algae mixed with aquatic plants in as little as 1 to 2 days after application. This easy to use algaecide allows swimming, fishing, livestock watering or irrigating plants after treatment.

Tools Needed

To apply Cutrine Plus Algaecide, you will need a backpack sprayer, handheld pump sprayer or professional skid sprayer, chemigation equipment, or drop hoses are needed.

For general purpose applications, we recommend using a backpack or handheld pump sprayer. A boat can also be used to cover areas in the middle of the water body.

Do not connect an irrigation system (including greenhouse systems) used for pesticide application to a public water system unless the pesticide label-prescribed safety devices for public water systems are in place (refer to the Chemigation Systems Connected to a Public Water Supply section of this label).

How to Use

• Step 1: Identify the type of algae to determine the copper concentrate needed for maximum results. This will help determine the amount of Cutrine Plus Algaecide that is required per acre per foot of water. To calculate acre-feet, measure the length, width, and average depths of the body of water within the area being treated. Then follow the formula on the label to determine the acre-feet (Length (ft) x Width (ft) x Average Depth (ft) / 43,560 = Acre-feet). For typical algae applications, 1 gallon of Cutrine Plus Algaecide can treat 1.5 acre-feet of water. So if you have a 6 acre pond, you would need 4 gallons of Cutrine Plus Algaecide.
• Step 2: Dilute the required amount of Cutrine Plus Algaecide with the right amount of water to ensure an even application is distributed. For small backpack sprayer applications, use a 9:1 dilution ratio (1 gallon of Cutrine Plus Algaecide to 9 gallons of water) or a 50:1 dilution ratio when using water pump equipment or large tank sprayers.
• Step 3: Apply Cutrine Plus Algaecide directly on the surface of the water, preferably on a fan nozzle spray setting for uniform coverage. Break up any large pieces of floating algae with a high-pressure sprayer if one is used. It is recommended to treat only 1/3 to 1/2 of the body of water to prevent harming fish, as removing the algae can deplete the oxygen source. Do not enter water bodies until the application process is finished.

Where to Use

Cutrine Plus Algaecide can be applied in lakes, potable water reservoirs, ponds (Farm, Fire, Fish, Golf Course, Irrigation, Ornamental, Storm water Retention, Swimming), industrial ponds, wastewater, fish hatcheries and raceways, aquaculture Facilities, crop and non-crop irrigation conveyance systems (ditches, canals, and laterals).

Do not apply more than 1.0 parts per million to areas used for drinking water.

When to Use

Cutrine Plus Algaecide can be used when algae or hydrilla plants are growing or as a preventive treatment in labeled water sites.

Apply Cutrine Plus Algaecide when there is calm and sunny conditions and when the water temperature is at least 60 degrees Fahrenheit. No more than 1/2 of the water body may be treated at one time. If reapplication is needed, it will need to wait until 14 days have passed after last application.

In ponds (farm, fire, fish, golf course, irrigation, ornamental, storm water retention, swimming), small lakes, fish hatcheries, aquaculture facilities, treatment with this product should be started when visible, actively growing algae and susceptible plants appear in spring, preferably before significant surface accumulations occur

Safety Information

Cutrine Plus Algaecide is safe around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing or applying this product.

Do not use in waters containing Koi and hybrid goldfish. Not intended for use in small volume, garden pond systems.

Waters treated with this product may be hazardous to aquatic organisms. Treatment of aquatic weeds and algae can result in oxygen loss from decomposition of dead algae and weeds. This oxygen loss can cause fish and invertebrate suffocation. To minimize hazard, do not treat more than 1/2 of the water body to avoid depletion of oxygen due to decaying vegetation.

Special Considerations

Waters treated with Cutrine Plus Algaecide may be used for swimming, fishing, further potable water treatment, livestock watering or irrigating turf, ornamental plants or crops after treatment.

Some states may require permits for the application of this product to public waters. Check with your local authorities.