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Mycotoxin Survey in North America: November 2025 Update

The first update from the 2025 PROcheck mycotoxin survey is here! Contact your dsm-firmenich representative to learn how to submit samples for analysis and contribute to the survey.

2025 US and Canada Corn Ingredient Survey Reports

  • A-Trichothecenes (A-Trich): T-2 toxin, HT-2 toxin, Neosolaniol*, Diacetoxyscirpenol
  • B-Trichothecenes (B-Trich): Deoxynivalenol (DON/Vomitoxin), 3-Acetyl-deoxynivalenol, 15-Acetyl-deoxynivalenol, Nivalenol*, Fusarenon X*
  • Fumonisins (FUM): B1, B2, B3*
  • Zearalenone (ZEN)
  • Aflatoxins (Afla): B1, B2, G1, and G2
  • Ochratoxin A (OTA)
  • In Canada, samples are also routinely screened for Mycophenolic Acid (MPA) and Sterigmatocystin (STC).

*Not screened for in Canada

The survey results represent samples sent in for surveillance testing only and does not include any sample submitted following clinical signs.

Below we discuss trends of each of these feed ingredients regarding mycotoxin occurrence. Additional details including mean contamination levels and risk by state or province can be found by downloading the full report.

USA Corn

  • 46 samples submitted from 10 states. 
  • Overall occurrence for corn samples:

Occurrence

2025

2024

Total positive

98%

92%

>1 Mycotoxin/sample

45%

77%

  • Occurrence status by mycotoxin group:

Mycotoxins

2025

2024

A-Trichothecenes

11%

16%

B-Trichothecenes

38%

70%

Fumonisins

84%

65%

Zearalenone

40%

73%

Aflatoxins

16%

5%

Ochratoxin A

0%

1%

  • Based on the 45 corn grain samples tested to date, surveillance of 2025 crop suggests an increase in the occurrence of Fumonisins and Aflatoxins (+19% points and +11% points, respectively) while A-Trichothecenes are similar (+5% points) and B-Trichothecenes and Zearalenone occurrence appears to be down (-32% points and -33% points, respectively) vs. 2024 crop year results.
  • Contamination patterns may shift as the proportion of samples submitted from the Midwest increases.
  • It is important to keep in mind that as of August 1, 2023, Romer Labs implemented the updated PLUS Method featuring enhanced sensitivity. Changes in laboratory methods including lowered limits of detection (LOD) may influence historical comparisons vs. 2023 through 2025 survey results.
Download US Corn Grain Report

USA Corn Silage

  • This data set will be updated once more samples are screened as part of the survey.

Canada Corn

  • This data set will be updated once more samples are screened as part of the survey.

Canada Corn Silage

  • This data set will be updated once more samples are screened as part of the survey.

Continued monitoring and surveillance of 2025 crop ingredients is warranted to provide on-going characterization of contamination patterns and trends in North America.


Results based on the samples analyzed in the region to date.

Mycotoxin Services & Tools

  • Mycotoxin PROcheck

    A 5-step comprehensive mycotoxin risk management service program designed to counteract the mycotoxins occurring in feed ingredients, and to safeguard the health and performance of your animals.

  • Mycotoxin Detection

    We offer a range of analytical services to customers to assess the mycotoxin contamination of feed materials.

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