A noxious invasive plant that has plagued Louisiana and Texas waters for more than a decade finally has found its way to Lake Fork, the Lone Star State's No.1 trophy bass lake. Possibly giant salvinia was brought in accidentally by boat or trailer from Toledo Bend, Sam Rayburn, or Caddo.
"We do everything we can within the limits of manpower and budget that we have to work with," said Larry Hodge, spokesman for Texas Parks and Wildlife Department (TPWD). "The problem is that everybody who has a boat is a potential vector."
"We've found infestations like this on other reservoirs in East Texas and have gone in and physically removed the plants, all that we can find," he added. "If you catch it early, sometimes you can get rid of it, at least temporarily."
On Nov. 18 in Chaney Branch, agency biologists confirmed the presence of this fast-growing, free-floating fern that can double its coverage in a week, as it blocks access and displaces native plants, which can't grow under its dense mats.
"The infestation appears to be confined to this branch and a another small cove west of the dam and occupies an estimated 3.25 acres," TPWD said. "Judging by the distribution and age of the plants, it appears it has been in place for several months."
The Sabine River Authority (SRA) immediately close boat ramps at Chaney Point South and Secret Haven to reduce the risk of spreading the plant. It also checked at bridge crossings and along shorelines for additional plants.
Additionally, SRA and TPWD crews have physically removed plants, as well as placed about 1,100 feet of floating boom across the creek, in hopes of containing the infestation within the 90-acre cove.
TPWD also plans to conduct a chemical treatment, using glyphosate. "All efforts will be made to protect beneficial plants, while focusing on killing the invasive giant salvinia," the agency said, adding that it will continue to look for the plant in other areas of the lake.
"We've had a lot of rain and high water this year and a lot of wind," said biologist Kevin Storey. " I suspect this will affect Lake Fork for years."