Table 4. Microorganisms that affect onions

Micro-organisms	Action on Onion Spoilage	References
Aspergillus niger	Black discoloration of tissue near neck. Causing black mold rot	Srinivasan and Shanmugam (2006)
Pseudomonas aeruginosa	Causing soft rot on Onion. Pale yellow to light brown tissues. Water-soaked appearance	Sinha et al. (2018)
Penicillium expansum	Causing a blue mold, puncture and bruises	Nassarawa and Sulaiman (2019)
Botylis cinerea	Causing a gray mold and drying of bulb	Ji et al. (2018)
Fusarium oxysporum F. sp. Cepae	Causing a bacterial brown rot and a dark brown discoloration	Ji et al. (2018)