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Calyx-end Rot of Apples. Avery E. Rich, Plant Pathologist, New Hampshire Agricultural Experiment Station, Durham 03824. Phytopathology 60:1152. DOI: 10.1094/Phyto-60-1152.

Two types of calyx-end rot were observed on immature McIntosh apples. An Alternaria sp., which was weakly pathogenic, was isolated from the small, dark lesions. Sclerotinia sclerotiorum was isolated from the larger, light-brown lesions, and was highly pathogenic.