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I've started seeing cockroaches in the kitchen at work. We've managed to keep their population from exploding by cleaning. Since their food supply is now limited and the critters are highly active, I expect that they would be quite vulnerable to traps.
The traps I have in mind are carnivorous plants, like pitcher plants. Are there any species that specialize in beetles, or more specifically, cockroaches?
It's a nice sentiment, but considering practicality, even if you did get the environment right for your plants (most carnivorous plants are rather picky), cockroaches are not going to fall into the traps. They are careful, and usually ground feeders. They will rarely fall from above, and falling into a plant trap is not a likely thing.
Most carnivorous plants target flying insects, and the ones that also target ground feeders are usually too small. Better to go with regular traps.
I purchased a venus flytrap in the middle of my roach erradication. (My ex roomies left their own roomies) So far, one plant has captured twelve baby roaches that were drawn to the nectar. Even baby heads of the flytrap have snapped on the tiny bugs.
