Trichothecium roseum

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Trichothecium roseum asexual spores (click on image to enlarge it)
Author(s): Gerald Holmes, Valent USA Corporation
Source: IPM Images

Trichothecium roseum (Pers.) Link 1809 - (pink rot of muskmelon)

This fungus is widely distributed and causes various diseases on trees and vegetables, including trunk diseases of fruit and other trees, as well as dieback and rots on fruits and vegetables. For example, it causes bark cracking on the trunks of trees (e.g. see Tang et al., 2016), pink rot of muskmelon, a major postharvest disease in parts of China (Gong et al., 2019), or apple core rot.

The fungus produces pink-to-white colonies. The conidia are elongated and often slightly pyriform with 2 cells and one septum, approximately 15-20 µm long and around 10 µm wide.