 Ramping up the war against mosquitoes. From the KELOLAND.com News Center, I'm Tom Rooney. That war was going well for the city of Sioux Falls until all of the recent flooding created plenty of standing water that mosquitoes use for nesting. City Environmental Health Manager Dominic Miller says now city crews have to go after adult mosquitoes. If we can kill them before they become adults, that's by far better. But they will be out spraying with weather permitting at least three times this week.