Bunch Rot of Grapes Caused by Aspergillus aculeatus. W. R. Jarvis, Agriculture Canada Research Station, Harrow, Ontario N0R 1G0. J. A. Traquair, Agriculture Canada Research Station, Harrow, Ontario N0R 1G0. Plant Dis. 68:718-719. Accepted for publication 20 March 1984. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-718.

Aspergillus aculeatus is recorded as a pathogen of grape berries in southwestern Ontario. It is a wound pathogen that enters the berry through fractures caused by partial detachment of fruits at the pedicel in tight bunches and through splits and insect punctures. The disease is associated with high temperatures. Sclerotia were formed in culture but have not been seen in the field or in inoculated grapes.