Moisture is provided in the drip pan underneath the refrigerator and food is usually abundant in the area around the refrigerator. In this location, roaches have everything they need to grown and reproduce. Many least-toxic controls are fairly low in toxicity. However, a few are fairly safe because they are applied so they are unlikely to come into contact with humans or pets because of the way they are applied. Baits are least-toxic control because the active ingredient is usually not very toxic.
Baits work best when efforts are made to keep the infested area clean.
They should be placed near infested areasunder sinks, behind stoves and refrigerators, and around garbage cans. There are many types of baits on the market, but research reports have shown that the active ingredient in some bait products, hydramethylnon, is very effective. Boric Acid and Desiccants. When the roach walks through it, the powder sticks to its body. When roaches preen themselves, they ingest the boric acid which slowly poisons them.