If you look for natural insecticides or cleaning solutions, you’re bound to come across the idea that baking soda can take care of nearly any household problem. It’s non-toxic to children and pets, making it a safe and popular option, and you’ll find plenty of advice for combining it with onions or sugar to make a bait.
However, while baking soda may kill a few cockroaches that eat it, this kind of bait is not nearly as effective as actual insecticide bait that can spread poison throughout the roach community. You’re welcome to try it, as it is harmless and inexpensive, but it’s also unlikely to make a significant dent in the problem.