April Grafting Optimal For Fraser Fir (IMAGE) American Society for Horticultural Science Caption Scientists graft Fraser fir onto rootstock of Turkish fir to produce disease-resistant trees. Credit Photo by John Frampton Usage Restrictions None 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.