Putative aldehyde dehydrogenase; part of the gene cluster that mediates the biosynthesis of the mycotoxin fusarin C (PubMed:22652150). Within the cluster, FUS1, FUS2, FUS8 and FUS9 are sufficient for fusarin production (By similarity). The other FUS cluster members are not essential for fusarin C biosynthesis (By similarity). an aldehyde + H2O + NAD(+) = a carboxylate + 2 H(+) + NADH Belongs to the aldehyde dehydrogenase family.