T&D News 2008 Number 2

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Facilities

All is Not Ducky With Duckweed

Wastewater treatment lagoons will not function properly when duckweed or other invasive aquatic plants take over. The tech tip "Got Duckweed? Get Carp!" (0873–2304–MTDC) explains how (in most States) triploid grass carp can come to the rescue.

This is a picture of a waste water treatment pond that has been overgrown by duckweed.Triploid grass carp cannot multiply, but will live for more than 8 years and can grow to more than 30 pounds if they get enough to eat. Because they eat so much of so many types of plants, precautions must be taken to prevent their accidental release into natural waters.

For additional information, contact Kathleen Snodgrass, project leader (phone: 406-329-3922; e-mail: ksnodgrass@fs.fed.us).


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