skip to Main Content

First report of Fusarium neocosmosporiellum on soybean in Illinois: New detection complicates the field diagnosis of red crown rot and other fungal diseases

  • October 22, 2026
  • Diane Plewa, Esneider Mahecha, Boris Camiletti

Summary
Fusarium neocosmosporiellum (the fungus associated with Neocosmospora stem rot) has been confirmed on soybean plants from Clay County, Illinois by the University of Illinois Plant Clinic. This pathogen has been previously identified in the southern United States on soybean and peanut. The effect on yield loss in the field is unknown. Plants colonized by this fungus can easily be confused with red crown rot due to the similar foliar symptoms (interveinal yellowing and browning of the leaf tissue) and similar signs (small,…

Read This Article

Phytophthora Crown and Stem Rot in Soybean: A Recurrent Disease in Illinois

  • June 27, 2025
  • Diane Plewa, Esneider Mahecha

Soybean Phytophthora root, crown, and stem rot is one of the most significant diseases affecting soybean production worldwide. Multiple species of Phytophthora, a group of related soilborne pathogens, can infect soybean and cause primarily root rots while Phytophthora sojae causes root, crown, and stem rot, resulting in more severe symptoms and increased yield loss. In the state of Illinois, it ranks among the top yield-reducing diseases, following white mold and soybean cyst nematode (SCN).…

Read This Article

Plant Clinic Update – May 2025

  • May 30, 2025
  • Diane Plewa, Esneider Mahecha

The University of Illinois Plant Clinic is an Extension program located in the Department of Crop Sciences. For more information, please see our website: https://extension.illinois.edu/plant-clinic or contact us at 217-333-0519.
 
Wheat Samples: We have received 3 wheat samples so far in 2025, all from southern Illinois. Bacterial leaf streak, Septoria leaf blotch, and thrips were found on the samples from Marion County, while anthracnose, Fusarium head blight, Septoria leaf blotch, stripe rust, and thrips were found on the sample from Jackson County.…

Read This Article
Back To Top