Aug 05, 2019 - 07:36 AM
Advion Cockroach Gel will work when the roaches eat it. If they don't eat it, then obviously they won't die. This doesn't mean that it did not work. What it does mean is that you need to try a different bait. Combat roach baits are not recommended as they are retail variety and will not work.
A good bait to use for German Roaches is Vendetta Plus. This cockroach gel bait is very popular and in cases where Advion does not seem to be accepted by the roaches, Vendetta does. Here is the link - https://www.epestcontrol.com/pest-pro...
Since I don't know what the exterminator will do, I can't answer that question.
I would recommend to try using Vendetta Plus since this is something you can do yourself on a regular basis. Simply place small pea size placements no closer than 10" apart wherever you see them.
Regular baiting or treatment is the best way to kill German Cockroaches. I have a good article on How To Kill German Cockroaches here - http://www.epestcontrol.com/articles/get-rid-german-cockroaches/