I think you would not need to combine the two pesticides and apply it in the home to kill the insects and pests.You can combine the two pest but it won't be work anymore.It doesn't matter that you are using two types of pesticides only work is working at a time.

Curious if you can combine "bedbug and flea killer" and "ant and roach spray". Obviously I can spray both but, does it work more effectively if I wait a certain period of time before spraying the second?