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Epidemiology and Symptomatology of Apple Bitter Rot. Jack Taylor, Professor, Department of Plant Pathology and Plant Genetics, University of Georgia, Athens 30601; Phytopathology 61:1028-1029. DOI: 10.1094/Phyto-61-1028.

Viable inoculum of Glomerella cingulata was produced on apple bitter rot mummies during March and April and the pathogen was isolated from developing fruit during April and May. Artificial inoculations 2 weeks after bloom produced previously unrecognized symptoms similar to those observed under field conditions, and produced typical bitter rot symptoms ca. 6 weeks later.