Which factor is a major concern for maintaining peanut quality during storage?

Humidity levels are a major concern for maintaining peanut quality during storage because peanuts are highly sensitive to moisture. When humidity is too high, it can lead to mold growth and spoilage, which can significantly affect the quality and safety of the peanuts. High moisture content not only compromises the flavor and texture of peanuts but also increases the risk of aflatoxin contamination, which is a toxic compound produced by certain molds.

In contrast, light exposure primarily affects the color and aroma of peanuts, potentially leading to undesirable flavor changes, but it does not have the same immediate and severe impact on overall quality as humidity does. The type of storage used, while important for proper ventilation and temperature control, is also not as critical as managing humidity levels directly related to preventing spoilage. Lastly, while the types of pesticides used are vital for ensuring safety and compliance, they do not play a direct role in maintaining the quality of peanuts during storage like humidity does. Therefore, controlling humidity is essential for preserving the integrity of stored peanuts.