Guide to Aquatic Weed Control
BUTLER COUNTY
SOIL & WATER CONSERVATION DISTRICT
1810
PRINCETON ROAD, HAMILTON, OH 45011
PHONE:
(513) 887-3720
FAX: (513) 785-6668
Correct herbicide applications are important to achieve desirable control. The volume of water and/or area to be treated must be determined accurately. Chemical application rates are provided on the label in either an amount to apply per surface acre or per acre-foot of water. One acre is a surface area measurement of 43,560 square feet. An acre-foot is one acre of water one foot deep. To determine acre-feet of water, multiply the surface area in acres by the average depth in feet.
CIRCLE
= |
EXAMPLE: a pond radius 85 feet x 85 x 3.14 = 22686.5 square feet total surface area (/ 43,560 = 1/2 acre surface area) |
| RECTANGLE
= length x width |
EXAMPLE: a pond length 145 feet x width of 75 feet = 10,875 square feet total surface area (/ 43,560 = 1/4 acre surface area) |
| TRIANGLE
= (base x height) / 2 |
EXAMPLE: a pond base of 100 feet x height of 50 feet = 5,000 square feet / 2 = 2,500 square feet total surface area (/ 43,560 = 1/10 acre surface area) |
| OVAL
= length x width x 0.8 |
EXAMPLE: a pond length of 200 feet x width of 90 feet x 0.8 = 14,400 square feet total surface area (/ 43,560 = 1/3 acre surface area) |
FLOATING PLANTS |
CHEMICAL | RATE |
| Moss & Filamentous algae | Aquashade | 1 gal/per ac |
| Copper Sulfate | 2.7lbs/Ac.Ft. | |
| Cutrine Plus Liquid | 0.6 gal/Ac. Ft | |
| Algae Pro | 0.75-1.5 gals/Ac.Ft | |
| K-Tea | 0.68-3.4 gals/Ac.Ft | |
| Hydrothol 191 | 11-44 lbs./Ac. | |
| Cutrine Plus Granular | 60 lbs./Ac. or 1 lb. Per 750 sq.ft. | |
| Duckweed & Watermeal | *Reward with pt./Ac. wetting Agent | 2 oz. per gal. of water or 1-2 gals./Ac. |
| Sonar AS | 1 pt./0.067 Ac | |
| Avast! Liquid | 1 pt./0.50 – 0.75 Ac. | |
| Water Lily | Pondmaster/*Rodeo | 2 gal./ Ac. |
| Aquacide Pellets | 10 lbs./4,000 sq.ft. | |
| Sonar AS/SRP | See label |
* Requires a non-ionic surfactant/ wetting agent: Aquagene 90, Cide-Kick II, or Silenergy.
| SUBMERSED PLANTS | CHEMICAL | RATE |
| Coontail, Milfoil, Pondweeds, Naiad | Aqua-Kleen (2,4D Granular) | 100-200 lbs./Ac. |
| Aquashade | 1 gal./Ac. | |
| Aquathol Granular | 13-135 lbs./Ac. Ft. | |
| Aquathol K Liquid | 0.3-3.2 gals./Ac. Ft. | |
| *Reward | 2 gals./Ac. | |
| Sonar AS | 1 qt./Ac. | |
| Sonar SRP | 13-20 lbs./Ac. | |
| Avast! Liquid | 1 qt./ Ac. | |
| Avast! Granular | 16 lbs./Ac. | |
| Aquaquat | 10 gals./Ac. | |
| Komeen | 6-12gals./Ac. | |
| Chara (Attached Algae) | Aquashade | 1 gal./Ac. |
| Cutrine Plus Granular | 60 lbs./Ac. | |
| Cutrine Plus Liquid | 1.2 gals./Ac. Ft. |
* Requires a non-ionic surfactant/ wetting agent: Aquagene 90, Cide-Kick II, or Silenergy.
| EMERGENT PLANTS | CHEMICAL | RATE |
| Cattails | Pondmaster/*Rodeo | 2 gal./Ac. |
| Rushes | *Reward | 2 gal./Ac. |
| Sedges | Sonar | See label |
| *Eagre | See label |
* Requires a non-ionic surfactant/ wetting agent: Aquagene 90, Cide-Kick II, or Silenergy.
| SHORELINE VEGETATION | CHEMICAL | RATE |
| Brush & Small Trees | Pondmaster/*Rodeo | 2 2/3 oz. per gal. to be sprayed |
| *Eagre | 1-2 oz. per gal. to be sprayed |
* Requires a non-ionic surfactant/ wetting agent: Aquagene 90, Cide-Kick II, or Silenergy.
Apply chemicals only at labeled rates.
Read the label to determine water use restrictions on each chemical.
Use of a non-ionic surfactant may be required with some products to make the chemical stick to the target plant.
For ponds with heavy weed infestation, partial treatments may be necessary to prevent oxygen depletion and possible fish suffocation associated with decaying vegetation.
Aeration equipment is desirable in ponds. It should be noted however, that while aeration may reduce algae and pondweed growth, it should not be installed solely for control purposes.
Several inert dye products can be applied to ponds. These products work similar to sunglasses; they color the water, which shades out the light necessary for aquatic plants.
Most ponds in our area receive adequate fertilization via natural runoff. Do not fertilize your pond unless you plan to continue doing it long term.
Maintain a good sod and grass cover around your pond and on the dam. Plant trees 25 to 30 feet away from the water's edge, preferably along the sides. This will prevent possible chemical uptake via root system and avoid angling problems. Conifers are preferred because their needles are not as likely to blow into the water as deciduous tree leaves are.
Muddy waters reduce the effectiveness of most chemical herbicides.
Do not feed or encourage Canada Geese; for one goose will produce 1200 pounds of manure a year. Four geese will produce an amount equal to that produced by one beef steer in a day.
Trade name and businesses listed in this publication are intended to provide
clarity, but do not constitute any endorsements by Butler SWCD, nor do they
imply discrimination against other products or firms. If any information
in these recommendations disagrees with the label, the recommendation must be
disregarded. The Butler SWCD assumes no liability resulting from the use
of these recommendations.