Monday Mycotoxin & Crop Report for July 13, 2026

Welcome to this week’s addition of the Monday Mycotoxin & Crop Report!

This report serves as a bi-weekly update for crop conditions, weather outlook, and mycotoxin levels. Information is sourced from the USDA, NIDIS, and US Wheat and Barley Scab Initiative.

As the season progresses, we will continue to monitor weather conditions for likelihood of toxin contamination, and report on verified levels of toxin from the field.

1. Winter wheat harvest is underway with drought conditions challenging quality and yield.
2. Corn reaches silking stage – crop remains primarily in good to excellent condition.
3. Spring wheat regions experience above average rainfall – raising risk for potential DON contamination.
   

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Weekly Weather Summary

The Corn Belt, Southeast, Delta, and New England regions experienced warm, dry conditions – creating potential risk for Aflatoxin and/or Fumonisin in areas where corn has reached the silking stage. Conversely, parts of the Great Plains and Mississippi Valley received higher than average rainfall – for areas where spring wheat or barley has reached the headed stage, DON and Zearalenone risk is elevated.

In states where winter wheat harvest is underway, weather has been favorable for harvest work.

Crop Progress & Condition Overview

• Winter wheat - Winter wheat harvest is 59% complete, 8 points ahead of the five year average. 47% of this year’s crop is listed as poor or very poor condition, primarily due to persistent drought. Areas of particular concern for poor condition and yield due to drought are Colorado, Kansas, Nebraska, Oklahoma, and Texas.
  
  Areas with medium – high risk for DON or Zearalenone due to increased precipitation during the flowering stage are pockets of Pennsylvania, New York, Maryland, Delaware, Michigan, Ohio, Montana, North Dakota and South Dakota.
• Corn –16% of the corn has reached the silking stage, slightly ahead of the five year average. Most of the crop is rated good to excellent condition – 7 points below last year. The following states have pockets of corn that are behind the national average of very poor and poor condition: Colorado, Illinois, Indiana, Kansas, North Carolina, Texas, Kentucky, Missouri, and Ohio. Comparing drought severity data from the US Drought Monitor and corn progress from USDA Crop Progress report, areas of Texas, Oklahoma, Kansas, Nebraska, Missouri, Arkansas, Louisiana, Mississippi, Tennessee, North Carolina, South Carolina, South Dakota, Georgia, and Florida are at highest risk for Aflatoxin and/or Fumonisin contamination due to severe / extreme drought in the area and progress thru the silking stage.
  
  Additionally, comparing rainfall data, predictive weather information, and corn progress, potential for DON & Zearalenone are medium to high risk in areas of Iowa, Minnesota, Wisconsin, Michigan, Illinois, Indiana, and Ohio.
• Spring Wheat – 54% of the spring wheat has reached the headed stage, matching the five year average. 55% of the crop is rated in good to excellent conditions, with the following states having areas of wheat that are behind the national average of poor and very poor condition: Washington, Idaho, and North Dakota.
  
  As the crop progresses thru the heading stage into the flowering stage, current risk for DON is at a medium – high level in areas of North Dakota, South Dakota, and Montana due to increased precipitation during the flowering stage.
• Barley – 60% of barley has reached the headed stage, 8 points ahead of the five year average. 52% of the crop is rated in good to excellent condition, with the following states having areas of barley that are behind the national average of poor and very poor condition: Idaho, Washington, and Montana.
  
  Current risk for DON is medium – high in areas of Montana, North Dakota, South Dakota, and Minnesota due to increased precipitation during the heading and flowering stages.

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