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Region 4 | July 31, 2025 | IL

Stephanie Porter
stephanie.porter@ilsoy.org

Caption: R3 ear and leaves with no fungicide (check)
Caption: R3 ear and leaves with fungicide
Caption: R4 soybeans
SYNOPSIS

We have received seven inches of rain in July, and yes, it rained again this morning. A much‑welcomed cooldown began today, with temperatures expected around 75°F. Corn is at R3, and soybeans are at R4 growth stage. Since Dad and my brother disagreed on applying fungicide to corn this year, we left a check strip untreated. At this time, gray leaf spot is much worse in the untreated check. A few aphids are showing up in corn, but nothing like last year. Soybeans look good, with only a few Japanese beetles lingering on field edges. With all the rain, the soybeans keep putting on new growth and pods at the top of the plant.

WHICH OF THE FOLLOWING BEST DESCRIBES CURRENT CONDITIONS IN THIS COUNTY?
Moderately Wet (soil is damp, standing water may be present in low areas, water bodies are full)
IF CONDITIONS ARE ON THE DRY END, WHICH OF THE FOLLOWING US DROUGHT MONITOR CATEGORIES BEST FIT CURRENT CONDITIONS
Near Normal (Dnada)
WEATHER

A much‑welcomed cooldown began today, with temperatures expected around 75°F into next week.

PRECIPITATION

We have received 7 inches of rain in the month of July and yes, it just rained this morning.

FIELD ACTIVITIES

Wet

SOYBEAN GROWTH STAGE

R4

CORN GROWTH STAGE

R3

WHEAT GROWTH STAGE

Harvested

INSECTS

A few aphids in corn and some Japanese beetles in soybeans.

WEEDS

A few breaks of waterhemp through the canopy, mostly in thin spots.

DISEASES

Gray leaf spot in corn, but Northern corn leaf blight seems to be becoming more prevalent with the cool down.

 
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