Q&A for How to Kill Lake Weeds

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How do I kill a water plant without harming the fish?

Andrew Carberry, MPH
Food Systems Expert
Andrew Carberry is a Food Systems Expert and the Senior Program Associate at the Wallace Center at Winrock International in Little Rock, Arkansas. He has worked in food systems since 2008 and has experience working on farm-to-school projects, food safety programs, and working with local and state coalitions in Arkansas. He is a graduate of the College of William and Mary and holds a Masters degree in public health and nutrition from the University of Tennessee.

Andrew Carberry, MPH

Food Systems Expert

Expert Answer

One method that helps fish and can help reduce weeds is to grow a riparian buffer zone around your body of water. Allow natural trees, grasses, flowers and shrubs to grow along the banks. This will reduce runoff, which often brings nutrients that cause excessive vegetative growth.

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Question

Which herbicides will kill water weeds without killing the fish in the lake?

Andrew Carberry, MPH
Food Systems Expert
Andrew Carberry is a Food Systems Expert and the Senior Program Associate at the Wallace Center at Winrock International in Little Rock, Arkansas. He has worked in food systems since 2008 and has experience working on farm-to-school projects, food safety programs, and working with local and state coalitions in Arkansas. He is a graduate of the College of William and Mary and holds a Masters degree in public health and nutrition from the University of Tennessee.

Andrew Carberry, MPH

Food Systems Expert

Expert Answer

Your first step should be identifying the weeds. Once you know what they are, consider what mechanical, cultural, or biological controls are best for removing this weed.

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Question

Is it possible to use lake weeds in my perennial garden as fertilizer?

Cheryl Morris

Community Answer

If you compost it first. If any plants can grow on land as well, make sure it is a hot compost to kill the plants & seeds.

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How do I kill Canadian pond weed?

Community Answer

Canadian pond weed can be killed by mechanical means of cutting or dredging. In either case, the cut roots and plant mass must be removed from the water to avoid regeneration. A weed cutting device and rake should do the trick.

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Is there an aquatic plant that can improve the water of a contaminated lake?

Community Answer

Cattails are great to remove contamination from a pond. They are actually used in water filtering in industrial operations to clean up toxins for water release to nearby rivers and streams.

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