Invasive Giant Salvinia found at Lake Nacogdoches

Texas Parks and Wildlife Department (TPWD) inland fisheries staff found a total of 30 acres of invasive giant salvinia in multiple locations at Lake Nacogdoches Feb. 5.

Within days of the discovery of a half-acre of giant salvinia at the Yellow Bank Creek cove, the TPWD Brookeland aquatic habitat enhancement team (AHE) deployed to the reservoir and found a larger infestation where Little Bayou Loco enters the reservoir. Those areas will be treated with a combination of giant salvinia weevils and careful application of contact herbicide on larger mats of the invasive plant.

“We will use weevils in the areas where the giant salvinia is being contained by other vegetation and only treat mats of salvinia when they form,” said Brookeland AHE team lead John Findeisen. “The containment vegetation – mainly consisting of cutgrass and torpedo grass – is crucial to the success of managing the giant salvinia at Lake Nacogdoches.”  Click on the following paragraph to access the full story.

Giant salvinia has been present in Texas for nearly 20 years. Giant salvinia was first discovered on Toledo Bend in 1998 and has since spread throughout East Texas. In addition to current infestations at Toledo Bend, Sam Rayburn and Caddo Lake, the invasive plant has been newly introduced or reintroduced at five Texas lakes since 2017: Lake O’ the Pines, Lake Palestine, Martin Creek Lake, Lake Fork and now Nacogdoches Lake.

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