Ash Yellows and Lilac Witches'-Broom: Phytoplasmal Diseases of Concern in Forestry and Horticulture. W. A. Sinclair, Department of Plant Pathology, Cornell University, Ithaca, NY. H. M. Griffiths, Department of Plant Pathology, Cornell University, Ithaca, NY, and R. E. Davis, Molecular Plant Pathology Laboratory, USDA-ARS, Beltsville, MD. Plant Dis. 80:468. . DOI: 10.1094/PD-80-0468.