Using Cornstarch to Kill Roaches?

Category Cockroaches
Cornstarch, by itself, cannot kill cockroaches but when mixed with plaster of paris, it is effective. Using cornstarch to kill roaches alone is not effective.


Ask a QuestionHere are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community or ask a new question.

May 9, 2005

I was told that cornstarch was an easy way to help get rid of roaches. Is that true? If so, does anyone have any directions for it? A friend of mine and her husband really need the help. My friend is allergic to all forms of bug sprays and bombs. Please help if you can. Thanks.

Dawn from Iowa


By (Guest Post)
February 29, 20080 found this helpful
Best Answer

Boric Acid works because roaches are cannibals and when the roach eats it, it gets sick , goes to the hive and other roaches eat the sick one. This works to not just move the roaches to another residence.

I've lived in Houston for years and the ONLY thing to effectively control roaches, both German and the big waterbug types is a boric acid attack. The BEST brand to find is Eckols Roach Tablets from St. Louis.

Reply Was this helpful? Yes
Answer this Question...

September 4, 2017

Can cornstarch kill roaches?


September 4, 20170 found this helpful
Best Answer

I don't have any roach problems, but with Google - I was able to find that you'll need equal parts of cornstarch and plaster of Paris and it'll get rid of your roach problems.



There is also a thread on ThriftyFun. Some said Boric Acid works. You can read peoples feedback here:

Reply Was this helpful? Yes
September 6, 20170 found this helpful
Best Answer

If mixed with Plaster or Paris, yes (also found in my search). I use boric acid that I get from the 99c store. I'd deep clean the entire area then sprinkle some down. If you start with the a dirtyish base, they will return.

Reply Was this helpful? Yes
Answer this Question...

In This Page
Home and Garden Pest Control CockroachesSeptember 20, 2017
Coronavirus Tips
Summer Ideas!
Back to School Ideas!
Pest Control
Ask a Question
Share a Post
Better LivingBudget & FinanceBusiness and LegalComputersConsumer AdviceCoronavirusCraftsEducationEntertainmentFood and RecipesHealth & BeautyHolidays and PartiesHome and GardenMake Your OwnOrganizingParentingPetsPhotosTravel and RecreationWeddings
Published by ThriftyFun.
Desktop Page | View Mobile
Disclaimer | Privacy Policy | Contact Us
Generated 2020-08-05 12:43:26 in 2 secs. ⛅️️
© 1997-2020 by Cumuli, Inc. All Rights Reserved.

Add to PageAsk a Question