Quagga and Zebra mussels have been a problem for waterways including the Great Lakes for decades, but there may finally be a targeted solution that can significantly reduce their numbers without disrupting other organisms. 
 
“Now the mussels may have met their match: Daniel P. Molloy, an emeritus biologist at the New York State Museum in Albany and a self-described ‘Bronx boy who became fascinated by things living in water.’
 

Inspired by Rachel Carson’s Silent Spring’ in high school, Dr. Molloy, now 66, has long been a pioneer in the development of environmentally safe control agents to replace broad-spectrum chemical pesticides. 

 
Leading a team at the museum’s Cambridge Field Research Laboratory in upstate New York, he discovered a bacterium, Pseudomonas fluorescens strain CL145A, that kills the mussels but appears to have little or no effect on other organisms
 
As a result, New York State has awarded a license to Marrone Bio Innovations, a company in Davis, Calif., to develop a commercial formulation of the bacterium. The product, Zequanox, has been undergoing tests for several years, with promising results. (Dr. Molloy has no financial ties to the company.)
 
Zequanox killed more than 90 percent of the mussels in a test using tanks of water from Lake Carlos in Minnesota, said James A. Luoma, a research biologist with the United States Geological Survey in La Crosse, Wis. A control group of freshwater mussels, unionids from the Black River in Wisconsin, were unharmed.”
Read the rest of the article at the link above.

IISG Instagram

Graduate students: don’t miss your chance to advance your research and expand your professional network! The 2026 Illinois-Indiana Sea Grant Graduate Scholars Program is now open for applications. Whether your work focuses on coastal resiliency, Great Lakes science, water resources, or community engagement, this opportunity offers funding and professional development to support your graduate research. Learn more and apply today — opportunities like this don’t come every year!👉 Read the full details at the link in bio.
✨ Start Your New Year with Great Lakes Learning! ✨Kick off 2026 by exploring the Center for Great Lakes Literacy Resource Library. It’s your one-stop hub for lesson plans, activities, and tools to bring Great Lakes science into your teaching setting.Visit the link in bio to dive in today! #TeachingTuesday#GreatLakes #NewYearNewResources