Synopsis of Fungi Listed as Regulated Plant Pests by the USDA Animal and Plant Health Inspection Service: Notes on Nomenclature, Disease, Plant Hosts, and Geographic Distribution

Fig. 3. Hemileia vastatrix urediniospores (photo credit J. Hernandez).



Image from Plant Health Progress article:
Synopsis of Fungi Listed as Regulated Plant Pests by the USDA Animal and Plant Health Inspection Service: Notes on Nomenclature, Disease, Plant Hosts, and Geographic Distribution