On Potato Sucrose Agar (PSA). Colonies. After 4 days growth ranges from 7.15-8.35 cm diameter with a mean ñ SD = 7.72 ñ 0.43; aerial mycelium floccose, white to greyish rose or white to vivid red, with deep red pigmentation. On Potato Dextrose Agar (PDA). Colonies. After 10 days growth varies from 8.5-9.5cm length with a mean ñ SD = 9.19 ñ 0.41, with dense aerial mycelium which varies from white to grayish red or white to brownish red; with deep red pigmentation; producing variable, globose, finely rough, colourless to pale brown "chlamydospores singly, in chains or in clusters, but often very slow to form. Anamorph. Sporodochia pale orange, but often rare or difficult to find. Conidia. Of only one type; macroconidia slender, falcate to straight, thick walled, 3- to 7-septate, 25-65 × 2.5-5 μm, each with a tapered and cone-shape apical cell and a well developed foot-shape basal cell; microconidia not observed. Notes. This species grows on Glycerol Nitrate Agar (G25N) with growth exceeding 2 cm diam., producing orange aerial mycelium and golden yellow or orange pigmentation; growth on mannitol medium exceeds 4 cm diameter with orange or yellow aerial mycelium and orange pigmentation; growth on Czapek-Dox Iprodione Dichloran Agar (CZID) exceeds 5 cm diam. with reddish aerial mycelium and reddish orange to brownish red or brownish red pigmentation. It produce phosphatase and peroxidase enzymes, but does not grow on tannin-sucrose agar or produce acid on creatine sucrose agar, acetylmethylcarbinol compound and urease enzyme. Different isolates respond variably towards production of pyrocatechol oxidase enzyme.
- Nafady, N.A. 2008. Ecological, physiological and taxonomical studies on the genus Fusarium in Egypt. MSc thesis, Faculty of Science, Assiut University, Egypt.
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