The 6th International Workshop on the Genetics of Tree-Parasite Interactions was hosted by Ohio State University from 5-10 August in Mt. Sterling, Ohio. Researchers from around the world, including Prof. Sanushka Naidoo and PhD candidate Caryn Oates from FABI, presented their work and participated in lively discussions on the future of plant defence research. Professor Naidoo gave an excellent talk on her Eucalyptus and Pine Pathogen Interactions (EPPI) research group’s recent research into the Eucalyptus-Leptocybe invasa interaction. The workshop included a tour of the nearby Hocking Hills State Park and US Forest Service Northern Research Station where they experienced first-hand the destruction caused by invasive pests and pathogens including the emerald ash borer, the hemlock woolly adelgid and Dutch elm disease as well as progress towards developing resistant tree genotypes to save these important North American species. Search #treeresistance on Twitter for more information.