Synergistic Effect (IMAGE) Max Planck Institute for Chemical Ecology Caption Synergistic effect of the male sex pheromone cis-vaccenyl acetate (cVA) and vinegar. Credit Graphical presentation modified from Das et al., <i>PNAS</i> 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.