[3] Sporulation of N. sphaerica causes its initial white coloured colonies to rapidly turn black.

[1] In 1913, S. F. Ashby and E. F. Shepherd isolated fungal cultures from banana plants and sugarcane, respectively, which were classified under the genus Nigrospora due to its morphology.

[1][7] The initial white translucent looking colony of N. sphaerica turns brown/black due to mass sporulation of conidia from the conidiophores.

[12] A study shows N. sphaerica to be the most abundant airborne fungal species found in various urban sites in Singapore.

Results showed N. sphaerica with the highest spore counts at ground levels and low altitudes around 40m.

The mechanism for projection relies on the conidiophore consisting of a flask-shaped support cell that bears the conidium.

These reported cases reveal newly identified plant hosts for the pathogen N. sphaerica that have been validated through Koch’s postulates.

[10] Initial lesions resemble small red spots around 2–5 mm particularly near the tips and edges of leaves,[9] eventually resulting in complete defoliation.

Inoculation of the pathogen using conidial suspension spray, and re-isolation of N. sphaerica satisfied Koch’s postulates.

[14] Cases of leaf spot disease of kiwi fruit (Actinidia deliciosa) have been reported from orchards in Huangshan, Anhui Provence, China.

Conidia morphology and culture properties suggested N. sphaerica as the etiological agent, later confirmed by Koch’s postulates and ITS identification.

A woman in south India was diagnosed with a fungal corneal ulcer after being hit in the eye from a cow’s tail.

Analysis of corneal scrapings showed presence of hyphae elements suggesting cause of ulcer from a fungal pathogen.

It was hypothesized that this special case of fungal corneal ulcer was caused by transfer of spores to the patients eye from contamination with soil (a common habitat of the fungus) or other matter from the cow’s tail.

Etiolated wheat coleoptile bioassay indicated that the compound is biologically inactive, and ineffective against both gram-positive and gram-negative bacteria.

The study also shows that the metabolite reduces progression of late blight disease in tomatoes caused by P.