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Developing sustainable roses through education and breeding

Rose Rosette Disease (RRD) is a devastating disease in roses. It makes the rose unsightly because of abnormal growth of the rose plant tissue, including symptoms such as witches’ brooms, excessive thorns, enlarged canes, and malformed leaves and flowers. RRD has been reported since the early 1940s but only in 2011 did research demonstrate that it is caused by a virus, aptly named the Rose Rosette Virus (RRV). In 2014, we were granted funding by the USDA Specialty Crop Research Initiative program to research this disease with the goal of developing roses that are resistant to RRD. In 2022, we began our new project, Sustainable Roses, where our long-term goal is to develop sustainable rose landscapes based on cultivars resistant to rose rosette disease and rose black spot disease.