Invasive Cycad Scale (image) University of Guam Caption Tiny cycad aulacaspis scale insects feed on leaf surfaces of Guam's endemic cycad plant. Credit University of Guam file photograph. Usage Restrictions None 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.