Biomass inhibition of fungi by essential oils. Biomass inhibition of Aspergillus niger (a), Fusarium udum (b), Fusarium oxysporum (c) and Magnoporthe grisea (d) in presence of essential oils lemon grass, palm rosa, eucalyptus, geranium and citronella. Biomass inhibition of A. niger (e), F. udum (f), F. oxysporum (g) and M. grisea (h) in presence of essential oil major components citral, geraniol and citronellal.