Which storage practice helps prevent aflatoxin contamination in grain storage?

• A. Minimize dust accumulation in milling and mixing areas
• B. Keep bins completely sealed for years without inspection
• C. Storing at moisture well above recommended levels
• D. Rely solely on pesticide spraying

Answer: (A)

Aflatoxin contamination happens when certain molds, like Aspergillus, grow on stored grain under warm, humid conditions. The presence of dust in milling and mixing areas creates an ideal substrate and microclimate for these fungi to colonize and produce toxin. By keeping dust levels low, you cut down on surfaces where mold can thrive and reduce cross-contamination between batches, making it less likely for aflatoxin to form and spread.

Other practices miss the mark because they don’t address the conditions that drive mold growth. Sealing bins for years without inspection can hide moisture build-up and hidden mold pockets. Storing grain with moisture above recommended levels provides the exact environment molds need to grow and generate aflatoxin. Relying only on pesticide spraying targets pests, not fungi or toxins, and won’t prevent mold growth or toxin formation.