Aphid (IMAGE) Bielefeld University Caption This is an aphid infestation of the stem close to the bud of a tansy. Credit Bielefeld University/Jana Stallmann Usage Restrictions The image may only be used with appropriate caption or credit 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.