How do you get rid of thunder bugs that attract to bright coulers?

They are attracted to yellowish colored things, I have them in my greenhouse and I just put a few trays of olive oil around my pots in clear plastic containers and they get stuck in the oil and die. I have almost killed off all of the litter guys in about a weeks time, the oil is thick with dead thrips.

Also the yellow fly tape works well, but be careful where you hang it because you don't want to bump into it and get your hair caught in it :)