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Iowa Department of Agriculture and Land Stewardship’s Annual Corn Crop Survey

Every fall, IDALS samples new corn crop around the state for the presence of mycotoxins – fungi that can contaminate grain, creating health issues for livestock.

Because of last year’s growing conditions, IDALS anticipated the study would show low levels of mycotoxins. However, 94 percent of corn samples showed the presence of vomitoxin, also known as deoxynivalenol or DON. Four of 99 samples showed vomitoxins that exceed the FDA guidance level. Based on the prevalence of vomitoxin around the state, IDALS recommends feed mills test their stored corn and work with livestock producers who may be affected.

As the name implies, vomitoxin consumption can cause vomiting and feed refusal in livestock. Swine and poultry producers, especially those feeding a large percentage of their protein as DDGS (which concentrates vomitoxin levels), should watch for these clinical signs. If questions or concerns arise, livestock producers should contact their herd veterinarians and nutritionists.   

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Do Cold Temps Impact Emerging Corn & Soybeans? | Pioneer Agronomy

Video: Do Cold Temps Impact Emerging Corn & Soybeans? | Pioneer Agronomy

A cold snap swept across west central Minnesota and eastern South Dakota, bringing frost, fog, and temperatures dipping into the 20s—raising urgent questions about early crop damage.

Pioneer Agronomist Eric Rice breaks down what those overnight temperatures could mean for emerged corn and soybeans, how to assess frost injury, and why patience is key before making any replant decisions. Learn the critical differences between corn and soybean growing points, what cosmetic vs. serious damage looks like, and how last week’s high winds may also be influencing what you’re seeing in the field.

Watch for:

• Frost thresholds for early-season crop damage

• Why corn may be more resilient than it looks

• Soybean growth stages and frost susceptibility

• How to evaluate brittle stems and discolored tissue

• Why waiting 4–5 days before assessing stand loss matters

• When to contact your local Pioneer agronomist or sales representative