Which product will perform best for you? We've outlined several common nuisance weeds and algae and our recommended treatment regime. Please be sure to properly identify the nuisance before proceeding.

ENTER MARYLAND DNR AQUATIC PLANT IDENTIFICATION PAGES

COMMON NUISANCE WEEDS AND ALGAE

Filamentous Algae
Filamentous algae can be any of a number of species referred to as "moss" or "pond scum". Filamentous algae often grows on the bottom of ponds in the shoreline areas and pops to the surface as it grows.
Filamentous algae with a smooth or slimy texture can often be controlled with Cutrine Plus Liquid or Cutrine Plus Granular. Algae with a more "horse hair" texture is usually treated with a combination of Cutrine Plus Liquid and Reward.

Planktonic Algae
Planktonic algae give the pond the look of "pea soup". It consists of millions of single celled algae that live throughout the water column.
Planktonic algae is best controlled with Cutrine Plus Liquid.

Eurasian Water Milfoil

Eurasian Water Milfoil (EWM) is an exotic species to the US. Without natural predators, it quickly displaces more desirable aquatic plants. The key to EWM control is to treat the plants when they are actively growing (usually in mid-May to mid-June).
We recommend treating EWM with a selective herbicide like Navigate. Navigate (active ingredient 2,4-D) will kill EWM at a treatment rate of 100 pounds per acre, and not harm native plants. Hybridized EWM may have to be treated at rates of up to 200 pounds Navigate per acre.

Curly-Leaf Pondweed

Curly-Leaf Pondweed (CLP) is also an exotic species to US waters. Because the product to control CLP (Aquathol K and Aquathol Super K) will also control beneficial native pondweeds, it is best to treat very early in the Spring when CLP has emerged, and native plants have not.