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.

It’s likely the giant salvinia traveled to Lake Nacogdoches by way of a visiting watercraft in the summer of 2017, Findeisen added. Similar to the most recent infestation at Lake Fork, staff believe there is enough giant salvinia scattered throughout the lake that eradication would be almost impossible at this point.

All boaters should learn to identify giant salvinia as well as other invasive species that occur in Texas waters. Most importantly, boaters should remember to clean their boats and trailers before leaving the boat ramp. Transporting giant salvinia, along with other invasive species, is prohibited by law and punishable by a fine of up to $500 per violation.

Boaters and property owners are urged to clean, drain, and dry their boats and trailers in between trips and to report additional infestations outside of the affected areas by calling (409) 698-9121 or emailing


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