Bumble Bee (IMAGE) Michigan State University Caption Researchers at Michigan State University's entomology department have unlocked a key to maintain the insecticide's effectiveness in eliminating pests without killing beneficial bugs, such as bees. The study, featured in the current issue of <i>Proceedings of the National Academy of Sciences</i>, shows that molecular tweaks can make the difference. Credit Photo by Bill Ravlin Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.