5 — No growth on resin film; large zone of inhibition on agar. 



4 — No growth on resin film; growth on agar up to edge of film. 



3 — Sparse mycelial growth on resin film; no production of new spores. 



2 — Moderate mycelial growth on resin film; slight production of new 



spores. 

 1 — Heavy mycelial growth on resin film; heavy production of new 



spores. 

 — Little distinction between growths on resin film and on agar. 



Figure 2. Representations of growth ratings, 



