Spiders are unaffected by most insecticides anyway. 

does any aerial insecticides?

Hi, I just recently purchased a single family home and the tenant is requesting me to have it sprayed for spiders or provide him with insecticide.

I do spread granular insecticide around the outdoor units every year.

I think they need to change the laws/covenants and restrictions, especially with our water restrictions, plus no insecticides either!

During their feed attempts they will come into contact with the residual insecticide and die shortly theirafter.

We cleared the building for six hours and fogged all units, put poison in every unit including inside walls and left all tenants with a do-it-yourself insecticide purchased off Amazon.The specialist brought to my attention another unit that was pretty dirty.  

Arsenic is present in insecticides/fungicides.

  One tool for controlling all kinds of bugs, that I have found extremely useful and efficient, but that many landlords do not consider, is to add an insecticide to both the indoor and outdoor paint of all my rentals. 

There is a "natural product" for the grubs called Milky Spore, and I tried it, but it just doesn't work fast enough to keep the lawn from getting destroyed; so it's either use chemical insecticides or the lawn is dead.