cropCENTRAL | Field Crop Production Resources

Symptoms of Red Crown Rot (RCR), caused by the soilborne fungus Calonectria ilicicola, have begun to appear in our 2025 field trials at Illinois farms in Madison and Macoupin counties with a known history of the disease (Figure 1). Similar observations are being reported by colleagues in Kentucky and Indiana, indicating regional disease activity is underway.

Figure 1. Early foliar symptoms of red crown rot in soybean observed in Madison and Macoupin counties on July 17,…

Southern rust of corn, caused by the fungus Puccinia polysora, has now been confirmed in Illinois during the 2025 season, with detections in Perry County in southern Illinois and McLean County in central Illinois. This marks a significant development since the previous update on July 15. With southern rust now present in the state, it is critical for farmers and agronomists to stay alert, scout actively, and be ready to implement timely management strategies to protect yield.…

Steve Brand– Commercial Agriculture Specialist
DeKalb County
Soil Conditions: Mildly Dry (soil is drier than normal, plant growth may have slowed)
The rains have finally arrived in northern IL with a handful of widespread storm events with more starting this weekend and pushing into next week. Most areas have reverted to D0 or D1 drought status and crops are doing well. Will county is the only area still in a D2 drought.…

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2025 crop progress
Despite intermittent delays in southern Illinois and replanting in some areas, the 2025 planting season has largely tracked the 5-year average of 2020-2024. The winter wheat development lagged through May, but picked up in June, with harvest progress similar to recent years. That meant normal doublecrop soybean planting progress.
Corn crop ratings improved through June, rising from 63% good + excellent (G+E) on June 2 to 74% by June 22,…

Steve Brand– Commercial Agriculture Specialist
Grundy and DeKalb Counties
Soil Conditions: Mildly Dry (soil is drier than normal, plant growth may have slowed)
Another dry week for northern IL with a few isolated storms occurring further west or in Chicago. We have slid back into a predominantly D1 drought, with large areas of Kane and Will County entering into a D2 drought. Corn and soybeans have started to grow out of the early season stunting,…

July 16 – Orr Agricultural Research and Demonstration Center Field Day
July 23 – Monmouth Field Day
July 24 – Ewing Demonstration Center Field Day
July 25 – Hemp Research Open House

Orr Agricultural Research and Demonstration Center Field Day
Event Date: Wednesday, July 16, All Day
Location: 37804 State Highway 104, Baylis, IL 62314
Sponsor: Department of Crop Sciences, University of Illinois
Contact Name: Luke Merritt
Contact E-Mail: lukem@illinois.edu
EVENT DETAILS:
To be guaranteed a meal,…

Kathryn Seebruck – Commercial Agriculture Educator
Winnebago County
Soil Conditions: Mildly Dry (soil is drier than normal, plant growth may have slowed)
Across much of the area, there are entire fields of soybeans exhibiting cupping. The widespread nature of the symptom could point to environmental stress as the cause, potentially from hot and dry conditions over the past week and a half. Many soybean fields are still not canopied.
Corn has greatly increased in height recently due to the accumulation of over 240 GDDs over the past week and a half.…