Aflatoxin Contamination in Maize and Peanuts: New Insights from Tamil Nadu

Strategic Insights -

Researchers from Tamil Nadu Agricultural University have investigated the prevalence of aflatoxin contamination in maize and peanuts in the state of Tamil Nadu, India. The study found that commercial varieties of these crops are highly susceptible to Aspergillus flavus infection and aflatoxin contamination, particularly at the pre and postharvest stages. The findings emphasize the need for integrated management strategies to mitigate the effects of aflatoxin contamination and ensure food security for the growing human population.

Key Takeaways:

  • A total of 600 samples each of maize and peanuts from Tamil Nadu, India, were screened for aflatoxin B1 (AFB1) contamination, with 28% and 32.67% of maize and peanut samples testing positive, respectively.
  • The minimum threshold level of 20 mg/kg was exceeded in 6% and 9.5% of both pre and postharvest maize and peanut samples.
  • The highest level of AFB1 was recorded as 147.23 mg/kg in maize and 162.72 mg/kg in peanuts, both in postharvest samples.
  • The influence of moisture on A. flavus proliferation and toxin production was evident, highlighting the importance of effective preharvest management practices.
  • Integrated pre and postharvest management strategies are crucial to minimize A. flavus infection and aflatoxin contamination in maize and peanuts.
  • Biocontrol agents such as Trichoderma viride and Bacillus subtilis can be used in conjunction with drying of harvest produce and storage in jute bags to reduce aflatoxin contamination.
  • The study emphasizes the need for food security measures to ensure the well-being of the growing human population.

Statistics:

  • 28% of maize samples tested positive for aflatoxin B1 (AFB1) contamination.
  • 32.67% of peanut samples tested positive for AFB1 contamination.
  • 20 mg/kg was the minimum threshold level for AFB1 contamination.
  • 6% of preharvest maize samples exceeded the minimum threshold level of 20 mg/kg.
  • 9.5% of postharvest maize samples exceeded the minimum threshold level of 20 mg/kg.
  • 147.23 mg/kg was the highest level of AFB1 recorded in maize samples.
  • 162.72 mg/kg was the highest level of AFB1 recorded in peanut samples.
  • 101809 is the article number of the research paper.

Sources:

  • Journal of Agriculture and Food Research
  • https://doi-org.sdpl.idm.oclc.org/10.1016/j.jafr.2025.101809
  • Tamil Nadu Agricultural University, Department of Plant Pathology, Coimbatore, Tamil Nadu, 641003, India
  • Elsevier (publisher of Journal of Agriculture and Food Research)