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Coordinating, educating, and promoting stewardship for the benefit and enhancement of the Batten Kill watershed in New York and Vermont.

 

 

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Didymosphenia geminata a.k.a. Didymo a.k.a. 'Rock Snot'

News Articles:

"Bad algae found in premier trout stream" August 7, 2007 article by Candace Page from the Burlington Free Press

" River-choking 'rock-snot' algae found in Batten Kill River" August 7, 2007 article by Daniel Barlow from the Times Argus

" 'Rock snot' evidence found in Batten Kill" August 7, 2007 article by Daniel Barlow from the Rutland Herald

didymoThe culprit.
"Rock Snot in Batten Kill" August 7, 2007 article from the Bennington Banner

" 'Rock snot' in Vt. river alarms biologists" August 6, 2007 article by Lisa Rathke, Associated Press, from the Times Argus

"Yankee Notebook: An alga by any other name" August 5, 2007 article by Willem Lange from the Rutland Herald

"Rock Snot in Batten Kill" - August 7, 2007 article from the Bennington Banner

"Algae Invader Threatens Vermont Rivers" - July 15, 2007 article from the Burlington Free Press

"Mother Nature answers back with a vengeance" - July 15, 2007 article from the Barre Montepelier Times Argus

"State launches didymo control campaign" - July 13, 2007 - interview with Lawton Weber, by John Dillon from VPR

"Education, not eradication, for 'rock snot': Horse is already out of the gate" - July 14, 2007 article by Dennis Jensen from the Rutland Herald

"Fishing Guide: 'Rock Snot' could spell doom for VT trout" - July 12, 2007 Associated Press article from the Bennington Banner

"Didymo Called Dire Threat" - July 11, 2007 article by Dennis Jensen, from the Rutland Herald

"New invasive algae species discovered in Vermont" - July 9, 2007 - interview algae expert Angela Shambaugh, of the VT DEC, by John Dillon from VPR

"Invasive Algae Found in Vermont River" - July 8, 2007 article from the Barre Montpelier Times Argus

"Invasive species found along Connecticut River" - July 7, 2007 article from the Burlington Free Press

Press Releases:

VT ANR Announces Regional Approach to 'Rock Snot' - July 13, 2007 VT Agency of Natural Resources

VT ANR Convenes Regional 'Didymo' Goup - July 11, 2007 VT Agency of Natural Resources

VT ANR Confirms First Northeastern U.S. Infestation of "Didymo" - July 6, 2007 VT Agency of Natural Resources

Invasive Algae Threatens New Hampshire's Rivers and Streams -- Algae known as "Didymo" or "Rock Snot" can devastate waterbodies - July 11, 2007 NH Dept of Environmental Services

Anglers Urged to Stop Spread of Nuisance Algae - July 24, 2007 NY Dept of Environmental Conservation

New York DEC Warns of an Aquatic Nuisance Algae in Vermont: Anglers Can Take Steps to Prevent its Spread in New York Waters - July 24, 2007 NY Dept of Environmental Conservation

NY DEC Announces NYSDEC Announces Didymo Found in Lower Section of Batten Kill - First Confirmation of the Aquatic Nuisance Algae in New York State - August 7, 2007 - New York State Department of Environmental Conservation

Other Sources of Information:

Joint VT/NH Didymo Site - including these two Stop Rock Snot! posters for infested waters and uninfested waters.

Biosecurity New Zealand -- Didymo -- See this page for the recommended procedures for cleaning your gear in order to reduce the threat of spreading this invasive algae.

Here's what the EPA has to say about Didymo.

Lawton Weber is the fly fishing guide who discovered the presence of Didymo in the Connecticut River on June 25, 2007 and reported it to the VT ANR. Read his Fishing Reports/Comments on his Pleasant Valley Fly Fishing website.

The Mad Dog TU Chapter's Didymo Warning.

Wikipedia entry on Didymo.

didymo

The VT ANR is urging anglers to institute New Zealand's recommended procedures for preventing the introduction and spread of didymo: Check, Clean and Dry.
  1. Check: Before leaving a river or stream, remove all obvious clumps of algae and look for hidden clumps. Leave them at the affected site. If you find any later, do not wash them down drains; dispose all material in the trash.

  2. Clean: Soak and scrub all items for at least one minute in either hot (140 degrees F) water, a two percent solution of household bleach or a five percent solution of salt, antiseptic hand cleaner or dishwashing detergent.

  3. Dry: If cleaning is not practical, after the item is completely dry to touch, wait an additional 48 hours before contact or use in any other waterway.