Bumble Bee Collecting Nectar Containing Iridoid Glycoside Secondary Metabolites (IMAGE) University of Massachusetts Amherst Caption UMass Amherst and Dartmouth researchers found that toxic chemicals in nectar reduced infection levels of the common bumblebee parasite by as much as 81 percent by seven days after infection. Credit Leif Richardson, Dartmouth College 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.