Jim from Birchdale Mn writes
Either active ingredient is going to give you comparable results. Big difference is that Suspend SC is odorless whereas Permethrin does have a mild petroleum odor to it. We recommend that you read our article How to Get rid of Cluster flies. This article will explain how to stop them from coming in and what to do if the cluster flies have already gained entry
Answer last updated on: 08/02/2013