Talstar P or
Bifen IT mixed with
NyGuard IGR would be a great choice for mosquito control and they are also labeled for spiders and other listed insects. You will mix an ounce per gallon of water per 1,000 sq ft per month on the exterior of the structure. During mosquito season, you will add 3ml to the Talstar P or Bifen IT and it will last for 7 months. It is an insect growth regulator and does not have to be applied as often as the insecticide concentrate.