Hitchhiking insect (IMAGE) University of Delaware Caption The spotted lanternfly is a prolific invasive insect reviled for the destruction it causes to fruit trees and native hardwood trees. First found in Pennsylvania in 2014, the pest has since spread to more than 100 counties across 10 states. A new study finds that this spread is largely attributed to human-mediated dispersal via transportation. Credit University of Delaware/ Katie Young and Isaiah Bell Usage Restrictions Must credit University of Delaware/ Katie Young and Isaiah Bell 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.