Aug 13, 2013 - 01:40 PM
Suspend Polyzone is probably one of the best products for indoor spraying currently on the market. If you are only getting 30 days, then that may be all you get.
30 days residual for indoor control is the norm. My experience is that the chemical companies greatly exaggerate the residual effectiveness. Kind of like the car companies greatly exaggerate their gas and fuel ratings.
Be sure to treat outdoors especially thoroughly. A good perimeter treatment spray combined with either dusting of your weep holes (if any) with DeltaDust and then topped off with a granular application with Bifen Granules witll give you better and longer results.
ePest IPM Bug Traps are great for capturing bugs indoors too, and lets you monitor the infestation, giving you longer times between applications.