**4. Conclusions**

*Helianthus* essential oils have been shown to be rich in α- and β-pinenes, sabinene, and limonene, and have demonstrated poor antifungal activities against *A. niger* and *C. albicans*, but promising activity against *C. neoformans* (although much lower activity than the reference antifungal drug amphotericin B). These and other monoterpene-rich essential oils deserve further exploration as alternative and complementary agents to combat fungal infections; further studies against more susceptible fungi are recommended.

**Author Contributions:** Conceptualization, S.K.L. and W.N.S.; methodology, S.K.L., L.G.S. and C.N.P.; software, P.S.; validation, W.N.S.; formal analysis, W.N.S.; investigation, S.K.L., L.G.S. and C.N.P.; resources, R.L.M.; data curation, W.N.S.; writing—original draft preparation, S.K.L., L.G.S. and W.N.S.; writing—review and editing, all authors; project administration, W.N.S.

**Funding:** This research received no external funding.

**Acknowledgments:** P.S. and W.N.S. participated in the project as part of the activities of the Aromatic Plant Research Center (APRC, https://aromaticplant.org/).

**Conflicts of Interest:** The authors declare no conflict of interest.
