What is the carbon dioxide toxicity physiological disorder in garlic scapes?

When garlic scapes are packaged in plastic film bags, the carbon dioxide level becomes too high in the later stage, often causing toxicity. It shows as yellow spots on the scape stalk, which gradually sink in, join together, and the tissue becomes necrotic, with water-soaked rot, ultimately causing the garlic scapes to break apart. Sometimes the scape bulbAlso becomes necrotic, giving off an alcoholic smell accompanied by a foul odor. In severe cases, the entire bag of garlic scapes rots, and this has become an important disease in garlic scape storage. In controlled atmosphere storage of garlic scapes, carbon dioxide generally should not exceed 5%, and ventilation should be carried out regularly; in the later stage, carbon dioxide exceeding 13% will cause toxicity.