Nigrospora
Nigrospora spp.
Woolly white colonies that develop large, shiny black single-celled spores
Gulf Coast Relevance: Moderate
Regularly encountered in Gulf Coast properties.
Appearance & Identification
Cottony white aerial growth turning gray to black
Fast white growth with characteristic jet-black spores
Outdoor plant-associated mold; appears indoors after moisture intrusion
Growth Conditions
85-95%
0.86-0.90 aw
70-95°F (21-35°C)
Common Growth Locations
Health Considerations
Allergic responses in sensitive people
moderate
Very low; rarely clinically significant
How Our Inspectors Detect It
Moderate in affected materials
- •Plant debris
- •Drywall
- •Wood
- •Filter media
- •Damp zones near intakes and windows
Remediation Considerations
Remove visibly colonized porous materials
HEPA vacuum and damp-wipe surfaces
Moderate — control humidity and outdoor debris
Frequently Asked Questions
Is Nigrospora (Nigrospora spp.) dangerous?
Nigrospora is classified as a low-risk, allergenic mold with moderate allergenic potential. Primary health concerns include allergen, possible asthma trigger. Very low; rarely clinically significant A professional assessment determines the extent and the right response for your property.
Where does Nigrospora grow in Gulf Coast homes?
Nigrospora commonly appears in damp plant debris, window areas, water-damaged finishes, hvac intakes. It thrives at 85-95% relative humidity with a water activity of 0.86-0.90 aw, conditions that are common across humid Louisiana and Mississippi Gulf Coast properties.
How do you identify Nigrospora?
Woolly white colonies that develop large, shiny black single-celled spores Colonies are typically white, gray, black with a cottony white aerial growth turning gray to black texture. Mild musty odor Confirmation requires professional sampling and laboratory analysis rather than visual identification alone.
What does remediation of Nigrospora involve?
Nigrospora typically calls for standard containment. Remove visibly colonized porous materials Moderate — control humidity and outdoor debris InspectaMold documents the conditions and provides an independent protocol so the underlying moisture source is corrected, not just the visible growth.
Concerned about Nigrospora in your property?
InspectaMold provides independent, lab-backed mold inspection and air quality testing across the Louisiana and Mississippi Gulf Coast. Get an accurate identification and a clear plan.