Last night, the north side of my house was suddenly invaded by thousands of these tiny flies. They appeared to be entering thru gaps in the windows and various other openings.
I think I traced their origin to the retaining wall in my backyard, which is near open space.
Does anyone know what these are and why they’d suddenly invade?
It was an unusually warm October evening for us (85+).
In the interim, I have treated the exterior window frames with Scion Insecticide and applied Alpine Fly Bait on the inside of the window frames and also around the recessed lighting (on the ceiling). This has the situation mostly under control, but I’m still a bit concerned on next steps.
I think I traced their origin to the retaining wall in my backyard, which is near open space.
Does anyone know what these are and why they’d suddenly invade?
It was an unusually warm October evening for us (85+).
In the interim, I have treated the exterior window frames with Scion Insecticide and applied Alpine Fly Bait on the inside of the window frames and also around the recessed lighting (on the ceiling). This has the situation mostly under control, but I’m still a bit concerned on next steps.