If you have a roach problem, you might have heard that boric acid is a powerful roach killer. But does boric acid powder actually kill cockroaches, and how effective is it for cockroach control?
In this guide, we’ll explain how boric acid works, the best ways to use it, and whether it’s the right solution for your cockroach infestation.
Key Takeaways
- Boric acid is different from borax and works well to kill cockroaches by contact and ingestion.
- Roaches get boric acid on their bodies, eat it while grooming, and die because it harms their insides.
- A light dusting in the right places, sealing cracks, and using bait and traps make it work better.
- Big infestations need pest control experts who use strong treatments, foggers, and sealing to stop roaches for good.
How Boric Acid Kills Cockroaches
Many homeowners confuse boric acid with borax, but they are not the same. Although they come from the same compound, boric acid is the preferred choice. It is highly effective at killing cockroaches through ingestion and physical contact.
When roaches walk over a fine layer of boric acid powder, it clings to their exoskeleton. As they groom themselves, they ingest it, which then attacks their digestive system and nervous system, ultimately leading to death. It also works as a desiccant, drying out these crawling pests from the inside.
A recent study found that it interferes with the gut microbiome of German cockroaches, making digestion impossible and accelerating mortality.
How to Use Boric Acid to Kill Roaches
For boric acid to be effective against different types of roaches, it must be used correctly. Here’s how:
1. Apply a Thin Layer in the Right Spots
Applying too much boric acid powder is a common mistake, as roaches will avoid large piles. Instead, lightly dust areas where they travel, such as crevices, baseboards, wall voids, and closets.
Focus on hiding places like cracks along walls and floors, behind kitchen cabinets, and under countertops.
A thin layer near stoves, refrigerators, dishwashers, and under sinks—where moisture and food sources attract cockroaches—can make the treatment more effective.
2. Seal Entry Points
To prevent a recurring roach infestation, use caulk to seal up small cracks and crevices where these pests can enter your home.
3. Use Boric Acid with Other Roach Killers
Boric acid works, but it’s even more effective when paired with roach bait, like gel bait, and an attractant, like sugar and peanut butter. Sticky traps help track activity, while diatomaceous earth dehydrates them.
Avoid DIY home remedies and repellents near baited areas, as they can drive these pests away before they ingest the treatment.
4. Keep It Away from Pets and Children
Although boric acid has low toxicity to humans and pets when used correctly, you should still keep it away from treated areas where children and pets may come into contact with it.
Signs You Need Professional Exterminators
Yes, boric acid kills cockroaches, but it works best when used correctly and combined with other pest control methods.
If you notice droppings, a musty odor, or roaches during the daytime, your infestation may be severe. In such cases, pest control companies like us at Simple Pest Management can use the following:
- EPA-approved roach killer
- Foggers for large infestations
- Cockroach killer treatments that reach where roaches hide
- Professional sealing of entry points
Need help with German or American cockroaches? Contact us today for expert cockroach control!
