Archive for the ‘Eurasian Milfoil Eradication’ Category

McDowell Lake Eurasian Milfoil Control Successful

September 7, 2008

McDowell Lake is located in the Little Pend Oreille National Wildlife Refuge just east of Coville, Washington.  This lake was revered by fly fishers throughout the northwest as one of our premier fishing waters.  In the mid 2000’s, the invasive weed Eurasian Milfoil was introduced to the systems.  This noxious weed rapidly filled the water column lake wide and choked off access to the fishery.  As this pristine water was walk in walk out, fishers with tubes could not move around the lake through the thick growth.

The US Fish and Wildlife Service turned to Aquatechnex to help solve this problem.  Aquatechnex has a long history of providing programs that can eradicate this invasive species from a water body.  We designed and delivered a program that utilized timed treatments of Sonar Aquatic Herbicide in the new Precision Release Pellet technology in 2006. The key to this success is being able to maintain low doses of Sonar in contact with the target vegetation for an extended period of time.  The Precision Release Pellet is designed to help accomplish that goal.

In the summer of 2007 and 2008, Aquatechnex divers have surveyed the lake and determined that the system remains milfoil free.  This lake is added to the list of lake systems we have successfully eradicated Eurasian Milfoil from using our technology.  In addition, as is generally the case, native aquatic plants are thriving in the nitch that used to be occupied by the noxious invader.

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Renovate OTF takes to the field

May 15, 2007

For years one of the only options we had for selective control of Eurasian Milfoil in high water exchange areas was 2,4-D.  This chemistry served us well.  Milfoil is a member of the broadleaf plant family and most native aquatic plants we look to protect are in the grass family.  Using this systemic herbicide allowed us to selectively target the milfoil and allowed the natives to recover into the space that used to be occupied by the milfoil. 

About four years ago, SePRO Corporation brought a new chemistry with similar charactoristics to the marketplace,  Renovate was registered by EPA about 2002.  We have used this product extensively and found that it provides much longer term control than 2,4-D applications while protecting the native plant communities.  We use this technology to restore native plant communities in infested water bodies.  The liquid formulation of Renovate however could be costly in deeper water applications.

To address this concern, SePRO has developed and released a new form of this product, Renovate OTF (stands for On Target Flake).  This light granular material sinks through the water column and sticks to the target plants.  This allows us to treat from the lake bottom up, not the other way around.  This is a major step in making this product more cost effective and we will be starting to deploy it in the field in the next few weeks.  For more information see:

Eradication of Invasive Aquatic Weeds, Can it Happen?

April 4, 2007

This is often a topic our clients ask us about when they undertake a control program focusing on Eurasian Milfoil or one of the other invasive plant species that plague their lakes. At last week’s Western Aquatic Plant Management Society Meeting ( Kathy Hamel of the Washington Department of Ecology presented an interesting paper on this subject. She highlighted a number of successful eradication efforts that have been conducted in Washington State. Our firm was responsible for the implementation of most of those programs. (more…)