Efflux pump involved in export of fusaric acid, a mycotoxin with low to moderate toxicity to animals and humans, but with high phytotoxic properties (PubMed:26662839). Constitutes a self-protecting mechanism of the fungus against critical levels of fusaric acid within the cell (PubMed:26662839). Expression is up-regulated upon exogenous application of fusaric acid (PubMed:26662839). Fusaric acid is phytotoxic to plants such as cotton and banana (PubMed:20955724, PubMed:23922960). It has been shown to induce programmed cell death in plants (PubMed:16868776, PubMed:23838885). In addition to a mild toxicity to animals, fusaric acid exhibits acanthamoebicidal, antioomycete, and antimycobacterial activities (PubMed:17927749, PubMed:22864988, PubMed:21811925). Belongs to the major facilitator superfamily. DHA1 family. Polyamines/proton antiporter (TC 2.A.1.2.16) subfamily.