The discoloration characteristics of some genera, Graphiopsis, which were frequently isolated in this study, have been described in numerous other studies. Nevertheless, there is still a lack of information on fungal discoloration, because many studies have been limited to only well-known fungi. These kind of fungal attack may lower the aesthetic value of WCHs, although this phenomenon is not influenced strongly by their strength. For that reason, further research is needed to assess the discoloration ability of ascomycetes in order to preserve WCHs more effectively