Louisiana Wildlife and Fisheries Biologist Manager Jeff Sibley talks about the massive watershed that is Lake Bistineau. During a meeting Monday, he says since the drawdown began on Aug. 15, the lake has dropped approximately five feet. Michelle Bates/Press-Herald

Lake Bistineau has come down five feet since the drawdown began Aug. 15, and officials say it needs to drop another two feet.

Louisiana Department of Wildlife and Fisheries Biologist Manager Jeff Sibley says they have treated more than 900 acres of the invasive aquatic weed giant salvinia with herbicides since the drawdown began.

“Additional and ongoing contractors will follow immediately afterwards, and possibly some aerial application if we can get everything worked out with the contractor,” he said. “We’ll continue to work with that and monitor things and get out as much herbicide as we can.”

The floor was opened up for