**5. Conclusions**

In conclusion, this study reports on the antifungal activity of *Tasmannia lanceolata*, *Backhousia citriodora* and *Syzygium anisatum* extracts against weak-acid resistant yeasts and elucidates the anti-yeast mode of action of Backhousia citriodora extracts. The current results sugges<sup>t</sup> that these three Australian native herbs possess the ability to inhibit the growth of food-spoilage yeasts that are resistant to organic weak-acids, which suggests the potential application in food and beverage industries as an alternative to synthetic antimicrobial agents.

**Author Contributions:** F.A.—sample preparation, antimicrobial and total phenolic testing, cell staining and fluorescence microscopic imaging, data interpretation, statistical analysis and writing of the manuscript; D.W.—UHPLC-MS analysis; N.N.—antioxidant analysis; R.M.—editing of manuscript; Y.S.—design of experiment and editing of manuscript.

**Funding:** Fahad Alderees's Ph.D. is supported by Public Authority for Applied Education and Training, Kuwait and Queensland Alliance for Agriculture and Food Innovation, Queensland, Australia.

**Acknowledgments:** The authors thank Kinnari Shelat, Andrew Cusack and Margaret Currie for their expert technical assistance.

**Conflicts of Interest:** The authors declare no conflict of interest. The founding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.
