Bangladesh issues warning over black spots and fungal infections in onions
Health authorities in Bangladesh have issued a warning regarding black spots and fungal infections on onions, advising consumers on safety. Officials noted that excessive humidity and poor ventilation create ideal conditions for fungal growth.
Consumers across Bangladesh have been urged to exercise caution regarding black spots and fungal infections on onions, following an official advisory issued on 10 September 2026. The advisory addresses the growing concerns surrounding the edibility of onions that show visible signs of deterioration, detailing the specific conditions under which these agricultural products become compromised.
According to the verified facts released by authorities, the appearance of black spots on the outer surface of onions is primarily caused by fungal infections. This microbial growth is significantly accelerated when onions are stored in environments characterized by high levels of moisture and inadequate air circulation. The combination of dampness and stagnant air creates an optimal breeding ground for the fungi to spread rapidly across the stored produce.
The advisory provides specific guidelines for determining whether an affected onion remains safe for human consumption. Experts state that if black spots, powdery residues, or fungal layers persist even after the outer skin has been completely peeled away, the bulb should not be eaten. Consuming onions in this compromised state poses potential health risks, making strict visual inspection necessary before food preparation.
To prevent fungal contamination and extend the shelf life of onions, the guidelines emphasize the importance of proper storage techniques. Households and merchants are advised to keep their onion supplies in dry environments that facilitate continuous and adequate air movement. Maintaining these specific environmental conditions is critical to preventing moisture accumulation and inhibiting the rapid development of fungal spores during storage.
