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Plant
Identification -- Algae -- Filamentous
Algae |
| FILAMENTOUS ALGAE -
Common genera: Spirogyra, Cladophora, Rhizoclonium,
Mougeotia, Zygnema and Hydrodictyon. |
| Treatment Tips -
Since it is important that the algaecide comes in
contact with most of the algae mass, larger algal
mats should be broken up prior to treatment. Use a
high-pressure water stream, an outboard motor, a
rake or an oar. |
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| Description: Also
known as “pond scum” or “moss”, filamentous algae forms
greenish mats upon the water’s surface. This algae
usually begins its growth along the edges or bottom of
the pond and “mushrooms” to the surface buoyed by the
oxygen it has produced. Individual filaments are a series
of cells joined end to end which give the thread-like
appearance. They also form fur-like growths on bottom
logs, rocks and even on the backs of turtles. The texture
of these growths may be slimy, cottony or coarse. Common
names such as frog spittle and water net have been
given to a few forms. |
Distribution: Common in its
many forms worldwide.
Several total or spot
treatments may be required to maintain control
during the season. Length of growing season,
sunlight, temperature and nutrient concentrations
affect the rate of regrowth. |
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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 9 to 1
to achieve uniform dispersion of algaecide in
water. For treatment of bottom growing algae,
apply Cutrine-Plus Granular at the rate of 60
pounds per acre. |
| 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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