The areas they live in would defeat the borax
Borax will kill fruit flies. Place some yogurt in the room with borax in it and it will kill off the flies.
Yes, borax does kill roaches. It interferes with their metabolism and kills them eventualy
Borax kills ants.
no
Yes if it is mixed with honey and/or peanut butter. It will kill them. Borax is poisonous if ingested.
yes
No, but centipedes can give you a nasty sting.
yes
I don't think so
Yes, Borax kills some weeds but no, Borax does not kill all weeds. The control in question numbers among its ingredients boron, which is a necessary soil and soil food web nutrient, in controlled quantities. Overexposure to boron therefore will be toxic to such weeds as ground ivy (Glecoma hederacea).
Centipedes Dont eat Millipedes. They will just kill them.
The borax will cause the fleas the release the grip on the carpet and when you vacumm they will be sucked up.