So if you are a pond owner what do you do? Should you allow the plants to freely grow and take the good with the bad, or should you attempt to control the nuisance plants? Step one to answering that question would be to accurately identify the plant. When you correctly have the plant identified look at how quickly it grows, at what depths, and how dense. A slow growing, shallow water loving, thin plant is preferred over something that doubles in size quickly, grows in twenty feet of water, and looks like knotted twine.
All of these control methods attack the plant rather then the reason the plant is growing. Aquatic plants need sunlight and nutrient to grow. To gain long term control of undesired plants you must reduce excess nutrient. To properly reduce nutrient you may need to address runoff sources, add bottom diffusion aeration, periodically use beneficial bacteria, or redistribute the nutrient using alternate plants. By controlling nutrient this way you will control unwanted plant growth for the long term.
As a pond owner and angler you must decide which plants you will allow to grow and to what density. Once you decide you need to control the unwanted plant growth then you must decide how to do it most efficiently.
Steven Bardin M.S.