Scott from Wanship Utah writes
Yes, Sevin Concentrate is labeled to kill sawflies. We would also recommend our Flies Be Gone Fly Trap for long term control. Flies Be Gone traps appeal strongly to a flies' natural instincts. It provides them with food and a warm place to lay eggs. Once inside the trap, they cannot escape. Flies Be Gone bait is especially appealing to female flies. Up to 85% of flies caught are female, which helps decrease the next generation of flies.
Answer last updated on: 06/29/2018