Lone Star Lake will be closed to the public for at least 24 hours next week so officials can administer an herbicide to fight an invasive species that has appeared.

The Douglas County Commission on Wednesday signed off on allowing the county’s Public Works Department to attack Eurasian Watermilfoil with an herbicide called Aquathol K.

Public Works Director Keith Browning said the lake will close Tuesday and will reopen as soon as Wednesday afternoon or sometime on Thursday. Notices will be placed at all boat ramps this weekend, he said.

Eurasian Watermilfoil is a plant that forms a dense mat of vegetation on a water’s surface, according to the Kansas Department of Wildlife, Parks and Tourism.

An earlier version of this story listed the wrong herbicide. The story has been corrected.