What Is Allium Aspergillus Black Mold On Onions?
Have you ever seen the wet, black stuff that grows on onions sometimes? You know that it’s something bad, and that you should toss the onions as soon as possible, but do you know what it is? This stuff is a type of black mold that grows on onions, called “allium aspergillus” or “aspergillus niger.” It usually starts in areas where the onion is bruised or injured, and can grow on any part of the onion, like the bulb or the stem. Allium aspergillus is a major problem for onion growers and it toxic if eaten. Most often, the mold starts between the different layers of the onion, and grows outward. The mold will give the onion a wet, water-soaked appearance. In the later stages of its development, the onion will become shriveled, withered and dry. Black mold on onions thrives in warmer climates, such as Southern California or Florida. Even though mold is associated with humid climates, black mold on onions is a particular problem in desert areas where onions are grown. Allium aspergillus mo
