Play-Doh Helps Plant Research (image) University of Delaware Share Print E-Mail Caption Ivan Hiltpold holds Play-Doh (plasticine) caterpillars designed to monitor birds preying on insects in response to plants sending out chemical pleas for help. Plant scientists refer to the chemicals as plant volatiles. Credit Monica Moriak Usage Restrictions None Share Print E-Mail 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.