Posted by John Fasoldt on 5:48:17 9/19/2013 from 188.8.131.52:
In reply to: German cockroaches posted by Terry on 20:44:40 9/18/2013 from 184.108.40.206:
IGRs can take more than 90 days to take effect. While the roach baits work pretty quickly, in a couple of weeks.
IGRs are used along with baits and insecticides to make up for the possibility that you don't get all the roaches.
I would use it, along with baits, in, say, a heavily-infested structure that has had multiple extermination attempts in the past, by professionals and/or amateurs. While it does take some time to work, it can kill those that escape your other attacks.
I would also use it routinely, in places that encounter roaches on a regular basis, such as bars, restaurants, etc.
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