1. Physical removal
In 2007-2008, hand-picking of the eggs and adults of P.insularum was instituted on Wellman Pond (15 acres), east of Tallahassee, Florida. This method was very labor-intensive and, ultimately, discouraging. Trapping the adults and dislodging the eggs proved to be the best solution. However, the goal of eradication proved elusive.
In the U.S., the only active ingredients potentially toxic to snails that is labeled for aquatic use are copper sulfate and chelated copper (Cutrine, Komeen, K-Tea and Captain). In cooperation with FWCC and SJRWMD, Dr. Bill Haller used copper sulfate at 3 mg/L (150 lbs/acre) in 3 acres of Newnans Lake (5,800 acres), south of Gainesville, Florida, on November 12, 2007. There was heavy mortality on the P. insularum, but Bruce Jaggers (FWCC) noted eggs in the vicinity in 2008.
We trapped and removed 4 tons (!) of P. insularum from Wellman Pond (15 acres), east of Tallahassee, Florida, from April to July of 2008. In doing so, the recent plantings of aquatic vegetation ($565,000)survived the year. The traps and bait have been continually refined to the point that the creators have a patent pending. They will be available to all in the Spring of 2009. Check out the “Trap” page on this site.