Freezing Temperatures May Temporarily Reduce Giant Salvinia in Louisiana

Last week’s temperatures dipping into the 20s and hovering in the low 30s may have caused some people to worry about their vegetation, but for the Louisiana Department of Wildlife and Fisheries, it offers a sign of hope in the state’s fight against giant salvinia, an invasive aquatic plant overtaking many of the state’s freshwater systems.

Biologists with LDWF hope the freeze will result in a reduction of salvinia this spring and summer, as it did in 2010 when salvinia coverage was drastically reduced following a winter freeze.

LDWF Secretary Jack Montoucet, who was with state Rep. Gene Reynolds on Saturday at Lake Bistineau, said they saw what appears to be a die back of salvinia on the lake. Lake Bistineau, a popular recreational site in north Louisiana, runs through Webster, Bossier and Bienville parishes.

However, significant visible reduction in coverage will not likely occur for a few months due to the amount of time it takes the plant to decompose. The department also notes that although the freezing temperatures may cause some level of die-off, it will not completely eradicate it.  Click on the following sentence to access the full story.

Giant salvinia, or salvinia molesta, one of the world’s most noxious aquatic weeds, is notorious for dominating slow-moving or quiet freshwaters.


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