you can use Dichloran-Chloramphenicol-Peptone Agar (DCPA) media for selective isolation of Fusarium species.
Reference: Andrews, S., and J. I. Pitt. 1986. Selective medium for isolation of Fusarium species and dematiaceous hyphomycetes from cereals. Appl. Environ. Microbiol. 51:1235–1238.
Isolation of specific fungal species from contaminated plants and environment such as air, soil and water is of significant interest for fungal plant pathologist..... The toxoflavin - based selective medium developed in this study showed a high selectivity for Fusarium species. For more details consult https://ncbi.nlm.nih.gov ---articles