Posted by samzenpus on Thursday May 23, 2013 @10:26PM from the sleeping-on-the-couch-instead dept. sciencehabit writes "Only a few years after roach motels were introduced in the 1980s, they lost their allure for an increasing number of German cockroaches. Researchers soon realized that some roaches had developed an aversion to glucose—the sugary bait disguising the poison—and that the insects wer