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EPA registration data for Reg. 67690-81 →
Natrix is an aquatic molluscicide used to control invasive or exotic mollusks, including zebra mussels, quagga mussels, Asian clams, and island clams. It also controls nuisance mollusks like snails that act as vectors for parasites. The active ingredient is Copper Ethanolamine Complex, which provides metallic copper. It is designed for use in various aquatic settings such as golf course ponds, ornamental ponds, fish ponds, irrigation and fire ponds, aquaculture sites, fresh water lakes, potable water reservoirs, and crop/non-crop irrigation and drainage systems. The product can be applied diluted or undiluted depending on the site and target. Handling requires specific PPE, including long-sleeved shirts, long pants, shoe plus socks, chemical-resistant gloves (Barrier Laminate, Butyl Rubber, Nitrile Rubber, Neoprene, Polyethylene, or Polyvinyl chloride), and protective eyewear. Users must be cautious when applying near desirable plants, crops, or aquaculture containing fish/shrimp, as copper can be toxic to these. When using in chemigation systems, specific equipment requirements and safety protocols must be followed to prevent contamination of public water supplies.
Pests covered (1)
mollusks (zebra mussels, quagga mussels, Asian clams, island clams, nuisance snails)
Areas treatable (1)
golf course ponds, ornamental ponds, fish ponds, irrigation/fire ponds, aquaculture, fresh water lakes, potable water reservoirs, crop/non-crop irrigation and drainage systems
Application instructions from the label 1
golf course ponds, ornamental ponds, fish ponds, irrigation/fire ponds, aquaculture, fresh water lakes, potable water reservoirs, crop/non-crop irrigation and drainage systems
For aquaculture, do not exceed 0.4 ppm of copper during any single application if fish are present.
- Target pest
- mollusks (zebra mussels, quagga mussels, Asian clams, island clams, nuisance snails)
- Location
- Both
Mixing instructions 3
| For pests |
Location |
Finished strength |
Label notes |
| mollusks |
Still and quiescent waters |
1.0 ppm |
Rate depends on water hardness; use higher rates in harder water (>50 ppm alkalinity). |
| mollusks |
Flowing waters |
0.2 - 1.0 ppm |
Refer to Table 1 for specific CFS and Gall/min requirements. |
| mollusks |
Chemigation systems |
0.1 to 1.5 ppm |
Refer to Table 2 for application rates per acre-foot or per million gallons. |
Worker safety
PPE required
Long-sleeved shirt and long pants; shoe plus socks; chemical-resistant gloves (Barrier Laminate, Butyl Rubber, Nitrile Rubber, Neoprene, Polyethylene, or Polyvinyl chloride); protective eyewear (goggles, safety glasses, or face shield).
Use restrictions 5
- DO NOT apply directly to, or otherwise permit it to come into contact with any desirable plants.
- DO NOT apply in a way that concentrated product comes in contact with crops, ornamentals, grass or other desirable plants.
- When treating aquaculture ponds where fish are present, DO NOT exceed a concentration of 0.4 ppm of copper during any single application.
- Do not apply in waters destined for use as drinking water unless additional and separate potable water treatment is received.
- Do not apply at a concentration greater than 1.0 ppm of copper in areas containing an active potable water intake unless the water intake can be turned off.
Active ingredient
Copper 9.1%
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