Steve from Bardstown writes
I have a terrible cluster fly problem in an old rear room of my house. Would you recommend this product or another one better suited to those flies? Thanks.
D-Fense SC is a great choice as part of cluster fly control. The best time to treat for this overwintering pest is in late Summer and Fall when this pest is trying to move indoors to stay warm during the winter. You can treat during warm spells and in the Spring as cluster flies move to go back outside, but you will not be able to completely eradicate them during this time. We also recommend sealing up cracks and crevices around windows, doors, and light fixtures where these insects may be able to enter or hide. Many folks will also use a fly light to help catch these insects in indoor areas.
Answer last updated on: 01/02/2017