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Plant
Identification -- Algae -- Planktonic
Algae |
| Planktonic Algae -
Common genera: Anabaena, Chlorella, Pediastrum,
Scenedesmus, Oocystis. |
| Treatment Tips -
Usually, the upper 3 to 4 feet of water will
require treatment for effective control. At the
mercy of wave and current action, planktonic algae
will sometimes accumulate along windward shores or
in back water areas, thus reducing the size of the
treatment area. |
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| Description:
Planktonic algae are microscopic plants, usually
suspended in the upper few feet of water, which often
reach bloom proportions. Their presence will cause water
to appear pea soup green or brownish. Natural die-off
may cause summerkill of fish due to oxygen depletion.
Some species may be toxic to livestock, wildlife, or man
or impart taste and odor problems. |
| Distribution:
Worldwide |
| Note: The above
picture was taken at Lake Delavan, WI that had
been treated for many years with tons of copper
sulfate. Build-up of copper precipitated in the
sediments and shading by the algae bloom
prohibited establishment of rooted plant growth,
which would have competed for nutrients. Fishing
and recreation declined. Effective restoration
measures,which included use of Cutrine algaecide,
have helped to re-establish desirable vegetation
and restore recreational value. |
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| Recommended Control Method:
Apply 0.6 gallons of Cutrine-Plus per acre-foot of
water. Chemical should be diluted at least 20 to 1
to achieve uniform dispersion of algaecide in
water. Several treatments may be required for
seasonal control. |
| Maintenance Control Method: Add
Aquashade at the rate of 1 quart per acre-foot of
water to prevent initial growth or to retard
regrowth of plants after chemical
treatment. |
Descriptions and pictures are from the book "How to Identify and Control Water Weeds and Algae", Edited by James C. Schmidt, 5th edition revised 1998, copyright 1976 Applied Biochemists. |
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