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Mycotoxin Survey in North America: June 2025 Update

Our June 2025 update from the annual PROcheck mycotoxin survey is here! This is the final official update for the 2024 crop. New survey updates will resume this fall once 2025 crop harvest begins. Contact your dsm-firmenich representative to learn how to submit samples for analysis and contribute to the survey.

2024 US and Canada Corn Ingredient Survey Reports

  • Each sample was tested for 6 major mycotoxin groups including,
  • 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

  • 243 samples submitted from  16 states. 93% of samples have originated from the Midwest.
  • Overall occurrence for corn samples:

Occurrence

2024

2023

Total positive

91%

94%

>1 Mycotoxin/sample

74%

78%

  • Occurrence status by mycotoxin group:

Mycotoxins

2024

2023

A-Trichothecenes

15%

18%

B-Trichothecenes

70%

64%

Fumonisins

62%

82%

Zearalenone

72%

72%

Aflatoxins

3%

10%

Ochratoxin A

1%

1%

  • Based on the 243 corn grain samples tested to date, surveillance of 2024 crop suggests an increase in occurrence of B-Trichothecenes (+6% points) while Zearalenone and A-Trichothecenes occurrence is similar (no change and -3% points, respectively) and occurrence of Fumonisins and Aflatoxins appears to be down (-20% points and -7% points, respectively) vs. 2023 crop year results.
  • 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 and 2024 survey results.
Download US Corn Grain Report

USA Corn Silage

  • Available upon request. Contact your dsm-firmenich representative to access this report.

Canada Corn

  • 10 samples from 2 provinces
  • Overall occurrence for corn samples:

Occurrence

2024

2023

Total positive

100%

100%

>1 Mycotoxin/sample

50%

56%

  • Occurrence status by mycotoxin group:

Mycotoxins

2024

2023

A-Trichothecenes

0%

9%

B-Trichothecenes

100%

100%

Fumonisins

20%

13%

Zearalenone

40%

44%

Aflatoxins

0%

0%

Ochratoxin A

0%

0%

  • Based on the 10 corn samples tested to date, surveillance of 2024 crop suggests a similar occurrence of B-Trichothecenes (no change) and Zearalenone (-4% points) with increased occurrence of Fumonisins (+7% points) vs. 2023 crop year results.
Download CAN Corn Grain Report

Canada Corn Silage

  • 68 samples from 3 provinces
  • Overall occurrence for corn silage samples:

Occurrence

2024

2023

Total positive

84%

99%

>1 Mycotoxin/sample

63%

65%

  • Occurrence status by mycotoxin group:

Mycotoxins

2024

20223

A-Trichothecenes

10%

6%

B-Trichothecenes

84%

97%

Fumonisins

22%

9%

Zearalenone

53%

60%

Aflatoxins

0%

0%

Ochratoxin A

0%

0%

 
  • Based on the 68 corn silage samples tested to date, surveillance of 2024 crop suggests a decrease in the occurrence of B-Trichothecenes (-13% points) and Zearalenone (-7% points) with increased occurrence of Fumonisins (+13% points) and similar occurrence of A-Trichothecenes (+4% points) vs. 2023 crop year results.
Download CAN Corn Silage Report

Continued monitoring and surveillance of 2024 crop ingredients is warranted to provide on-going characterization of contamination patterns and trends in North America. Keep in mind the potential for storage contamination to increase as we move into warmer weather and approach the bottom of grain bins.



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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