Citrus Greening Research (IMAGE) Texas A&M AgriLife Communications Caption Dr. Erik Mirkov reviews a Southern blot, part of the molecular biology research used to provide citrus trees with genetic defenses against citrus greening disease. Credit (Texas A&M AgriLife Communications photo by Rod Santa Ana) Usage Restrictions Use with credit. Not for resale. 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.