[header] How to kill aspergillus niger [title] Use alcohol to disinfect surfaces. [step] A 70% alcohol solution is an effective way to kill aspergillus. [substeps] Alcohol is an effective fungicide because it is able to penetrate the cell walls and spores of aspergillus niger, killing it in the process. 
To use alcohol, apply a liberal amount of a 70% solution to all visible areas of fungus, and let it sit for ten minutes. After 10 minutes of contact time with alcohol, you can wipe the treated area clean and dry it with a clean rag, cloth, or mop.