mustard leaf beetles (Phaedon cochleariae) (IMAGE) Max Planck Institute for Chemical Ecology Caption Two mustard leaf beetles (Phaedon cochleariae) feeding on cabbage. Beetle lines that no longer had pectinases after CRISPR-Cas9 genome editing were not able to degrade plant cell wall pectins. Their growth and survival was severely impaired. 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.