Insects Drive Rapid Evolution of Plant Hosts (14 of 17) (image) American Association for the Advancement of Science Share Print E-Mail Caption The turnip aphid (Lipaphis erysimi) exclusively feeds on plants of the crucifers and prefers different chemical compounds than the cabbage aphid, hence selecting for different plant genotypes. This image relates to a paper that appeared in the Oct. 5, 2012, issue of Science, published by AAAS. The paper, by Tobias Züst at University of Zürich in Zürich, Switzerland, and colleagues was titled, "Natural Enemies Drive Geographic Variation in Plant Defenses." Credit Image courtesy of Tobias Züst Usage Restrictions Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. Share Print E-Mail 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.