Cacao Pods (IMAGE) Penn State Caption Cocoa pods display the symptoms of black pod rot. A team of Penn State researchers used CRISPR-Cas9 gene editing to enhance plant resistance to the pathogen that causes the disease. Credit Andrew Fister, Penn State Usage Restrictions Non commercial use only 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.