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BIOMIN Mycotoxin Survey in US Corn: December 2019 Update

Our December update kicks off our annual Biomin® PROcheck mycotoxin survey in corn harvested in 2019.

Results are still preliminary due to the delay in this year’s harvest resulting in reduced sample numbers thus far, and our understanding of this harvest year’s risk will likely shift drastically in the coming months. Currently the sample pool includes 129 samples from 18 states.

BIOMIN Mycotoxin Survey in US Corn: December 2019...

Corn

  • 99% of ground corn samples are positive for at least one mycotoxin, vs 89% in 2017
  • 74% of samples have more than one mycotoxin, vs 47% in 2017
  • Aflatoxin prevalence in dry corn increased to 9% vs 4% in 2017, with average contamination levels increasing over seven fold.
  • Deoxynivalenol (vomitoxin) prevalence rose to 78% vs 70% in 2017, with average contamination level increasing by 42%
  • Fumonisin prevalence jumped to 78% vs 52% in 2017, with average contamination levels increasing by 30%
  • Zearalenone prevalence increased to 46% vs 25% in 2017, with average contamination levels remaining steady.
Corn Cob | Photo: BIOMIN

Corn By-Product

  • 94% of samples are positive for at least one mycotoxin, vs 100% in 2017
  • 88% of samples have more than one mycotoxin, vs 94% in 2017
  • Aflatoxin prevalence decreased to 2% vs. 9% in 2017, both years with similar and low contamination levels.
  • Deoxynivalenol (vomitoxin) prevalence decreased slightly to 93% vs 99% in 2017, with average contamination level doubling.
  • Fumonisin prevalence is 85% vs 91% in 2017, with average contamination levels remaining steady.
  • Zearalenone prevalence is 84% vs 80% in 2017, with average contamination level increasing over seven fold.
Corn Gluten Meal | Photo: Getty Images

Corn Silage

  • 93% of samples are positive for at least one mycotoxin, vs 91% in 2017
  • 66% of samples have more than one mycotoxin, vs 30% in 2017, a drastic increase in co-contamination.
  • Aflatoxin prevalence is 1% with low average contamination levels.
  • Deoxynivalenol (vomitoxin) prevalence has increased slightly to 92% vs. 85% in 2017, with average contamination level more than doubling.
  • Fumonisin prevalence increased to 25% vs 12% in 2017, with average contamination levels remaining steady.
  • Zearalenone prevalence jumped to 60% vs 26% in 2017, with average contamination level more than doubling.
Corn Silage | Photo: BIOMIN

These contamination levels present MEDIUM to HIGH risk for all livestock and poultry species depending on toxin and feed ingredient type. Overall, producers in the Midwest should be on the lookout for the impacts from deoxynivalenol and zearalenone, while Southern states should be vigilant regarding fumonisin and aflatoxin contamination.

Solutions

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