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Officials recommend managed drawdown of Anderson/Henderson Lake to fight invasive plants
Summary
A parish presentation called for a controlled drawdown from 9 to 6 feet over about two weeks to strand invasive hydrilla, water hyacinth and giant salvinia; speakers cited heavy infestations, prior 2014 success after an Army Corps permit and rising herbicide costs.
An unidentified presenter told the St. Martin Parish council that Anderson (Henderson) Lake faces a severe infestation of invasive aquatic plants and recommended a managed drawdown to reduce the growth and reproduction of those species.
“The biggest reason is we have a severe aquatic, a chronic, aquatic plant problem on Anderson Lake,” the presenter said, listing hydrilla, water hyacinth and giant salvinia as the primary invaders. He said the lake is roughly 5,000 acres at full pool and that a 2014 survey showed about 2,500 acres—roughly 50 percent—covered by invasive plants.
The presenter outlined an integrated control strategy that combines biological controls (stocking…
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