Product Overview
Hydrothol® Granular is a selective, rapid-acting, contact herbicide and algaecide. Very effective against a broad spectrum of submersed weeds, also controls problem algae at the same time. Refer to product label for application directions and rates.
Time Proven Results
Hydrothol® has been successfully used for over 20 years. For use in lakes, ponds, irrigation canals, and drainage ditches. Works rapidly enough to be effective in both still and slow moving water.
| Hydrothol® Granular Aquatic Algaecide & Herbicide is recommended for use against:
Click on your desired weed for more information and alternate control options. |
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| American Pondweed | Chara | Coontail | Curly Leaf Pondweed |
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| Filamentous Algae | Hydrilla/Elodea | Planktonic Algae | Brittle or Southern Naiad |
Application
Apply when target algae and aquatic plants are actively growing. Hydrothol® Granular is a contact algaecide and aquatic herbicide for use in drainage canals, lakes and ponds. Apply Hydrothol® Granular at the labeled rates as evenly as possible in the area to be treated. Repeat treatment when growth reappears.
Hydrothol® Granular Example:
Sample 100ft x 65ft Lakeshore Lot (6500 sq ft) 4 Ft avg. depth
*Amount of Hydrothol® required : 40 Lbs for Submerged weeds
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Lake and Pond Applications |
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Depth |
Parts per million (ppm) concentrations |
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|
0.05 |
0.1 |
0.2 |
0.5 |
1 |
1.5 |
5 |
|
|
1 |
3** |
5 |
11 |
27 |
54 |
82 |
250 |
|
2 |
5 |
11 |
22 |
54 |
109 |
163 |
550 |
|
4 |
11 |
22 |
44 |
109 |
217 |
326 |
1100 |
|
6 |
16 |
33 |
65 |
163 |
326 |
489 |
1650 |
**Lbs. of Hydrothol® Granular at depths for specific (ppm)
*Consult Label for Exact Doses & Important Application Directions. Rates vary depending upon depth and plant types. Dose requirements are less for whole water body treatments like a pond.
For Best Results
For best results, Hydrothol® Granular should be applied as early as possible after weeds appear or when they are actively growing. Contact time with weeds should be at least 2 hours.
Begin application in spring as water temperature warms to 50º F and above. Early treatment when growth first appears or begins to create a nuisance will reduce the amount of Hydrothol® needed. Early treatment will also reduce the amount of dead plant material that should be removed or left to naturally decompose allowing the nutrients within the dead plant material to be released into the water column.
Heavy, out of control growth may require more than one application or physical removal to gain control. For best results, use under conditions of minimal water flow.
Notices
Always read and carefully follow the product label. For use restrictions refer to product label.
A WI DNR Aquatic Plant Control Permit or DATCP Fish Farm License is required in WI in order to apply algaecides or herbicides. In addition ponds and lakes with overflows not contained on the property are required to obtain a WPDES permit. Illinois Residents are required to obtain NPDES permits through the Illinois EPA.
In order to apply chemicals in liquid form within Wisconsin, the applicator must be licensed with the State.
Recommendations of pesticide or treatments for specific algae or aquatic plants are provided for general information purposes only - no warranties are expressed or implied.
