Acyrthosiphon pisum (IMAGE) Max Planck Institute for Chemical Ecology Caption Pea aphids (Acyrthosiphon pisum) on a broad bean (Vicia faba): To determine the genes that regulate the production of nepetalactone in sexual females, the researchers harvested legs from female and male aphids and extracted RNA from the tissue samples. Credit Anna Schroll Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.