Andy comments:

No doubt that will kill the roaches.....

In a couple decades of renting houses to people who often
weren't as clean as I would have liked, I used the following
method to get rid of roaches:

I open all the cabinets and nooks and crannies in
closets and put in a tablespoon of Boric Acid. Then
I would set my vacuum cleaner on "blow" and blow
the powder around in such a manner as to put a
very light coating in all the dark places, under counters
behind drawers, etc. Then I would warn the tenants
not to vacuum up the powder if they came upon it.

Within a few days there would be no roaches, and there
would be no dead roaches all over the floor or in the
cabinets to clean up...

Whatever the mechanism, the critters apparently went
back to their nests to die.

I didn't use poisons, since that would leave dead roach
bodies all over the place, be harmful to pets and small
children, etc.........

Just the powder did the trick....

Another way is to dissolve the powder in water and
use a sprayer to coat everything I could find. The water
would evaporate and leave an ultra thin residue on the
surface that also worked well...... They don't have to
eat it, just walk on it.....

Anyway, I'm just passing along first hand experience
that was developed by trial and error. If you have a better
way, this is certainly the place to post it...


Andy in Eureka, Texas