You are here.
Commonly Used Aquatic Herbicides in Pennsylvania
| Aquatic Herbicide | Active Ingredient | Controls | Dosage | Notes |
|
FOR ALGAE
|
||||
| Algae Pro |
Copper, elemental 7% (triethanolamine complex) |
Algae - planktonic, filamenous Chara |
0.75 gal/acre ft. 1.5 gal /acre ft |
Treat one third to one half of the pond at a time |
|
Aquashade/Lesco Hydroblock |
Acid blue 9 dye 23.6%, Acid yellow dye 2.4% |
filamentous algae, early suppressionof some submerged plants | 1 quart / acre ft | Use early and with little or no overflow |
| Copper Sulfate | CuSO4 99% | Algae, flagellated protozoans | 0.68 to 1.36 lbs / acre ft | Treat half of pond at a time. Toxic to trout. More toxic in soft water. |
| Cutrine-Plus |
Copper, elemental 9% (triethanolamine complex) |
Algae - planktonic / filamentous Chara and Nitella |
0.6 gal / acre ft 1.2 gal / acre ft |
Toxic to trout. Calculate dose for upper four feet of water. |
| Cutrine-Plus (granular) | Copper, elemental 3.7% (ethanolamine complex) |
Algae - planktonic / filamentous Chara and Nitella |
60 lbs / acre | For bottom dwelling algae. Toxic to trout. |
| Hydrothol 191 | Monopotassium salt of endothall |
Algae - planktonic / filamentous Chara and Nitella |
0.6 to 2.2 pts / acre ft | Toxic to trout |
|
FOR SUBMERGED PLANTS
|
||||
| Aquathol-K | dipotassium salt of endothall - 40.3% | Pondweed (Potamegeton), milfoil, coontail, naiad | 0.6 to 1.9 gal / acre ft | Three day fish consumption restriction |
| Hydrothol 191 | monopotassium salt of endothall - 53% | Naiad, elodea, coontail, pondweed, milfoil | 0.7 to 3.4 gal / acre ft | Fish can be killed at dose greater than 0.4 gal / acre ft. 7 to 14 day water use restriction |
| Komeen | Copper, elemental - 8% (ethylenediamine complex) | Watermilfoil, elodea, pondweed, coontail, (NOT AN ALGICIDE) | 1.7 to 3.3 gal / acre ft | Toxic to trout |
| Reward | diquat dibromide - 35.3% | Coontail, elodea, naiad, pondweed, milfoil | 1 to 2 gal / acre | 2 to 5 day irrigation restriction |
| Sonar A.S. / Avast! | fluridone 41.7% | Bladderwort, coontail, fanwort, elodea, hydrilla, naiad, pondweed, watermilfoil |
<5' deep 0.16 to 1.25 qt / acre >5' deep 1.0 to 1.5 qt / acre |
Use with little or no overflow. Split treatment maintains more constant concentration. |
| Sonar SRP / Avast! SRP | fluridone 5% | Bladderwort, coontail, fanwort, elodea, hydrilla, naiad, pondweed, watermilfoil | 0.54 to 1.08 lbs / surface acre | Use with little or no overflow. |
|
FOR FLOATING PLANTS
|
||||
| Navigate / Aqua-Kleen | 2,4-D (20% to 27.6%) |
Water lily, spatterdock, watershield. Also milfoil, bladderwort |
150 to 200 lbs / acre 100 to 150 lbs / acre |
Granular 2,4-D formulations. |
| Reward | diquat dibromide - 35.3% | Duckweed | 1 gallon / acre | Surfactant use recommended. |
| Rodeo / Eagre | glyphosate - 53.8% | Water lily, spatterdock, watershield | 0.5 to 0.9 gal / acre | Can apply during active growth until later summer |
| Sonar A.S. / Avast! | fluridone - 41.7% | Duckweed, watermeal, spatterdock, water lily |
<5' deep 0.16 to 1.25 qt / acre >5' deep 1.0 to 1.5 qt / acre |
Use with little or no overflow. Split treatment maintains more constant concentration. |
|
FOR EMERGENT PLANTS
|
||||
| Reward | diquat dibromide - 35.3% | Cattail | 1 to 2 gallons / acre | Surfactant use recommended. |
| Rodeo / Eagre | glyphosate - 53.8% | Cattail, arrowhead, purple loosestrife, common reed | 0.75 gal / acre | Can apply during active growth until later summer |
Always follow the label instruction carefully!