First report of Penicillium polonicum causing blue mold on stored pear (Pyrus bretschneideri) fruits in China.
In the spring of 2019, a postharvest mold was observed at an incidence of 3 to 5% on pear (Pyrus bretschneideri) fruits at local markets in Beijing, China. Circular, light brown lesions with soft texture were prominent on infected pear fruits. The lesions expanded rapidly, and blue mold signs were visible at room temperature. Isolates were obtained from rotted pear and identified as Penicillium polonicum based on morphological and molecular characteristics. This is thought to be the first report of Penicillium polonicum causing blue mold decay on stored Pyrus bretschneideri worldwide.