Boric Acid

Boric acid works also: You sprinkle this odorless, white powder (a bit like fine sugar) where roaches might crawl in cupboards, cracks, - gets on the legs of roaches as they crawl around - they like to clean themselves and lick it off their legs - they get extremely thirsty - go for water usually outside - take on so much water as to get drowned - don’t have the facility to vomit it up like higher life forms - nice of them to die outside - keeps the house clean. :)

Warning: Per the "THE MERK INDEX", the eleventh edition, published by MERK &CO., Inc, in 1989, Boric Acid, Human toxicity, "Death has occurred from 5g in infants and from 5 - 20 g in adults"

Boric acid in low percentages is used in eye washes. I have used it quite effectively for perhaps 20 years to control roaches. You can have an infested place and after putting some of this around watch the population decline to nothing after 1-3 months. "Thrifty drug" store has this and chemical supply houses. The stuff is not expensive. I have even bought it at the local 99 cent store. Sometimes it’s hard to find. To be safe, hide, or make it inaccessible by kids and pets. I usually put it in cracks. Put it where the roaches will walk, but make it safe for those living in the area.

Offered by Mike.

A pinch of boric acid in a 20% alcohol solution does wonders for dog's ear infections. Much cheaper than vet bought stuff and more effective.

Offered by John.