I use these most of the time or other similar types...so far no issues.
The trick is to place the powder at their "entrance" and force them to bite/move these powder if they want to enter/exit their base.



This post has been edited by wchinwai: Dec 28 2022, 06:48 PM

outdoor then
I guess you might want to consider the bottle ant poison then.
I have used similar ones but the smell is strong....

for indoor?
I usually block their entrance with these and pushed with finger (to make it more compact)...so far 100% success rate for me.
If simply put somewhere...it wont work

haha...put too much?

man's job