Baking soda for pests: do not build the control plan around a kitchen hack

Why the claim sounds plausible

DIY recipes commonly combine baking soda with sugar or another food attractant and claim that ingestion kills ants or cockroaches. The problem is not that an individual insect could never be harmed. The problem is that a home treatment needs to be attractive, reach enough of the target population, work at a useful dose and fit the pest's biology. A kitchen recipe gives you no validated concentration, placement or performance standard.

For ants, colony behavior matters

Killing a few workers does not necessarily affect the nest. A labeled ant bait is designed around feeding and transfer behavior and gives you defined use directions. If ants ignore a bait, first check competing food, placement and species or food preference rather than assuming every sweet homemade mixture will reach the colony.

For cockroaches, target the harborage

EPA's current consumer guidance emphasizes removing food, water and shelter and using targeted controls when needed. For indoor cockroaches, monitoring traps and properly placed labeled baits can tell you where activity is concentrated and whether it is declining. Scattering food-based powder mixtures can instead add residue without solving moisture, cracks or the breeding population.

What to do instead

1. Confirm whether the pest is actually an ant or cockroach.
2. Remove accessible food, grease, water and clutter.
3. Use monitoring to find travel routes and harborages.
4. If chemical control is needed, choose a product labeled for that pest and location and follow its directions.
5. For ants, avoid repellent spray immediately around active bait. For cockroaches, combine bait with sanitation and moisture correction.
6. Measure whether activity falls instead of judging success from one dead insect.

Is baking soda harmless because it is food-grade?

No household substance should be treated as risk-free in every dose or setting. More importantly, using a low-hazard ingredient ineffectively can delay a real infestation while it grows. “Safer” pest control means matching exposure, efficacy and the actual problem — not simply choosing the most familiar ingredient.