Time of Day & PPO Herbicides (VIDEO) University of Tennessee Institute of Agriculture This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Using time lapse photography, this video shows the different levels of control of glyhposate-resistant Palmer amaranth achieved by three PPO herbicides applied at sunrise, noon and sunset. Credit Ginger Rowsey, courtesy UTIA 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.