Cerexagri: Aquatic Habitat Management - USA, Hydrothol® 191

Aquatic Habitat Management - USA / Hydrothol®

Fish Restriction Removal Supplemental Labels:
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Hydrothol® 191 - Aquatic Algicide & Herbicide

Aquatic Plant and Algae Management

Effects of Algae: Algae can be detrimental to water quality. In fact, it may cause illness to swimmers and other water users. Poor water quality as a result of certain strains of algae may even prevent water-contact recreational uses including swimming, water skiing and use of personal water craft. Algae blooms are the leading cause of fish kills in the U.S., compromising fishery management programs.

Effective Herbicide and Algicide: Hydrothol® Aquatic Herbicide and Algicide has been successfully used for over 30 years. Today Hydrothol® is used primarily as an algicide. Hydrothol® is the only registered broad spectrum organic aquatic algicide available today. Hydrothol® can be used in combination, in rotation or as an alternative to copper for control of algae.

Environmentally Sound: Hydrothol® quickly dissipates in the environment. When properly used, Hydrothol® provides excellent algae and weed control, but does not adversely impact the fishery or the aquatic environment. Hydrothol® does not bioaccumalate in either fish or the hydrosoil, and has a short half-life of less than seven days.

Versatile: Due to the fast activity of Hydrothol®, it can be effectively used in slow moving water, such as drainage and irrigation canals. In addition, spot or marginal treatments are highly effective against noxious weeds and algae in lakes and ponds. Hydrothol® is effective in muddy or murky water because it does not bind to the suspended sediment or organic matter.

Hydrothol® provides control where you need it, in the application area, not away from the target area. For this reason, Hydrothol® is a valuable tool in improving access to the water for recreational activities such as swimming, fishing and water skiing.

Application: Hydrothol® must be properly used to avoid toxicity to fish. Only marginal or sectional treatments are recommended and should be only be made by qualified commercial applicators. Applications should be made outward from the shoreline or in strips to prevent trapping fish in the treated zone. Refer to label for proper application rates.

For more information call 1-800-438-6071

As with any pesticide, always read and follow label instructions and precautions


Hydrothol® 191 Granular Aquatic Algicide and Herbicide Lake and Pond Applications
depth	0.05 ppm	0.1 ppm	0.2 ppm	0.5 ppm	1.0 ppm	1.5 ppm	5.0 ppm
1 ft.	3 lbs	5 lbs	11 lbs	27 lbs	54 lbs	82 lbs	250 lbs
2 ft.	4 lbs	9 lbs	13 lbs	18 lbs	26 lbs	35 lbs	35 lbs
4 ft.	11 lbs	22 lbs	44 lbs	109 lbs	217 lbs	326 lbs	1100 lbs
6 ft.	16 lbs	33 lbs	65 lbs	163 lbs	326 lbs	326 lbs	1650 lbs
*One acre equals approximately 208' x 208'. Use dosages over 1.0 ppm on very narrow margins or in areas where some fish kill is not objectionable. Do not treat more than 1 / 10 of the lake or pond at one time with doses in excess of 1.0 ppm.Low rates of 0.05 - 0.2 ppm should be used on light infestation of planktonic and filamentous algae. Higher rates should be used for branched algae species. Moderate algae infestations generally require 0.2 - 0.5 ppm. Marginal treatments require 0.3-0.8 ppm.


Hydrothol 191 Aquatic Algicide and Herbicide Dosages For Various Concentrations in ppm
depth	0.05 ppm	0.1 ppm	0.2 ppm	0.3 ppm	0.5 ppm	0.8 ppm	1.0 ppm	2.0 ppm	5.0 ppm
1 ft.	0.6 pts	1.1 pts	2.2 pts	0.4 gal	0.4 gal	1.1 gal	1.4 gal	2.7 gal	6.8 gal
2 ft.	1.1 pts	2.2 pts	4.3 pts	4.3 pts	1.4 gal	2.2 gal	2.8 gal	5.4 gal	13.6 gal
4 ft.	2.2 pts	4.3 pts	8.6 pts	1.6 gal	2.7 gal	4.4 gal	5.4 gal	10.9 gal	10.9 gal
6 ft.	3.3 pts	6.5 pts	12.9 pts	2.5 gal	4.1 gal	6.5 gal	8.2 gal	16.3 gal	40.8 gal
*One acre equals approximately 208' x 208'. Use dosages over 1.0 ppm only on very narrow margins or in areas where some fish kill is not objectionable. Do not treat more than 1 /10 of the lake or pond at one time with doses in excess of 1.0 ppm. Low rates of 0.05-0.2 ppm should be used on light infestation of planktonic and filamentous algae. Higher rates should be used for branched algae species. Moderate algae infestations generally require 0.2-0.5 ppm. Marginal treatments require 0.3-0.8 ppm.

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