This one is easier than some other rooms, since there's only one roach queen and it's in a narrow corridor. The main trick here is that a moving roach queen is naturally uninterested in spawning a roach in one square:
Click here to view the secret text
×the square it was on the turn before spawn.
For example, you can start this room by
Click here to view the secret text
×sending the roach queen to the south, such that on spawn it arrives at the dead end and doesn't spawn any roaches.
____________________________
Quick links to my stuff (in case you forgot where it was):
Click here to view the secret text