Algae

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Chemical Treatments

Read and follow label instructions before using any chemical in water. Dilute with enough water to permit even coverage over area to be treated. There are no restrictions or waiting periods on treated water.

• Copper Sulfate (bluestone) - use with caution because its toxicity to fish depends on water alkalinity. Here is a "rule of thumb" for amount to use:
• if total alkalinity of water is 0-49 ppm, do not use copper sulfate.
• If total alkalinity of water is 50-99 ppm, use 0.5 to 1.0 ppm.
• If total alkalinity of water is 100-200 ppm, use 1.0 to 2.0 ppm.
• Complexed and chelated copper compounds such as Cutrine-Plus, Algae Pro, K-TEA, and others. Refer to product label for application rates.
• Endothall (Hydrothol 191) plus copper sulfate - 1 gallon plus 5 pounds per surface acre. Do not use treated water for irrigation, livestock watering, or domestic purposes within 14 days of treatment. Fish may be used for food 3 days after treatment.
• Endothall (Hydrothol 191) - 1 gallon per surface acre. Do not use treated water for irrigation, livestock watering, or domestic purposes within 14 days of treatment. Fish may be used for food 3 days after treatment.

The information given here is for educational purposes only. Reference to commercial products or trade names is made with the understanding that no discrimination is intended toward other products that may also be suitable.

Biological Treatments

Specific kinds of algae can be effectively controlled using grass carp as an alternative to chemical treatments. Grass carp are highly effective in controlling muskgrass (Chara spp.) and stonewort (Nitella spp.), but are ineffective at controlling planktonic and other forms of filamentous algae. Generally, 5 to 10 grass carp per surface acre will control weeds. See publication 1894 - Grass Carp in Mississippi Farm Ponds for more information.

Professionals have given particular attention to make certain all herbicide treatments have been registered with the Environmental Protection Agency for use in the manner described. Registrations for specific practices are often changed or deleted; therefore, treatments suggested in this information sheet may not remain current indefinitely. Read and observe the manufacturer's label to prevent misuse of a herbicide. It is not intended or proposed that usage of any given practice suggested in this information sheet be in violation with existing registration or manufacturer's label.

If you fail to carefully read and follow suggested treatments, you could cause extensive damage to the environment, crops, livestock or humans.