Cutrine Plus Algaecide

Cutrine Plus Algaecide Aquatic Herbicide is a double-chelated copper solution effective against a wide variety of algal species. Due to its double-chelate it stays in the water column longer, and in combination with its greater amount of activity in the plant can be much more effective. Waters treated with this product may be used for swimming, fishing, further potable water treatment, livestock watering or irrigating turf, ornamental plants or crops after treatment.

Label is here.

Extracts from the Label

  • ACTIVE INGREDIENTS:
    • Copper Ethanolamine Complex, Mixed (Mono CAS# 14215-52-2 and Tri CAS# 82027-59-6)* …..27.9%
    • OTHER INGREDIENTS:………………………………………72.1%
    • TOTAL…………………………………………………………….100.0%
    • *Metallic copper equivalent, 9%. Contains 0.909 lbs. of elemental copper per gallon.
  • The minimum retreatment interval between consecutive treatments is 14 days.
  • Certain water conditions including low pH (<6.5) low dissolved organic carbon (DOC) levels (3.0 mg/L or lower), and “soft” waters (i.e., alkalinity less than 50 mg/L), increases the potential acute toxicity to non-target aquatic organism.

Plan to treat 10 ft. from the shore.

  1. The pond’s perimeter is 550 LF and average diameter is 175 ft.
  2. Area of a 175 ft circle (24,052 SF) minus the area of a 165 ft circle (21,382 SF) = 2,670 SF = 0.0612 ac.
  3. For 0.06 ac x 2 ft avg depth = 0.12 ac-ft of water to treat.

For low density filamentous algae

  1. From Table 1 for low-density filamentous algae apply 0.2 ppm.
  2. From Table 2 that requires 0.6 gallons/acre-ft.
  3. 0.12 x 0.6 = 0.072 gallons x 8 pts/gallon = 0.576 pts. or 1.15 cups or 9.2 oz. to spray the perimeter 10′ out.
  4. Typical dilution range is 9:1 when using backpack-type sprayer. 0.576 pints x 9 = 5.2 pints of water. So 2 gallons is fine.

For medium density filamentous algae

  1. From Table 1 for medium density filamentous algae apply 0.6 ppm.
  2. From Table 2 that requires 1.8 gallons/acre-ft.
  3. 0.12 x 1.8 = 0.21 gallons x 8 pts/gallon = 1.7 pts. to spray the perimeter 10′ out.
  4. Typical dilution range is 9:1 when using backpack-type sprayer. 1.7 pints x 9 = 15.5 pints = 2 gallons of water is just enough.

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