Stephanie Porter
Outreach Agronomist
309-660-5302
stephanie.porter@ilsoy.org

Stephanie Porter
Outreach Agronomist
309-660-5302
stephanie.porter@ilsoy.org

STEPHANIE PORTER UPDATES

Region 4 | August 6, 2024 | Montgomery

Stephanie Porter
stephanie.porter@ilsoy.org

Caption: Tar spot on corn
Caption: Downy Mildew on soybeans
Caption: Mid-May vs Early April planted corn
SYNOPSIS

The season is winding down but diseases seem to be flaring as previously applied fungicides fade. Tar spot is gaining ground with cooler temps. It will flourish on corn that is in later growth stages. As corn approaches R5, many may choose not to spray. Downy mildew appeared in soybeans. Fungicides are useless against it. Overall, crops appear in good shape with April corn still looking better than Mid-May planted corn.

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

80F

PRECIPITATION

None

FIELD/SOIL CONDITIONS

Dry on the top soil with adequate subsoil moisture

SOYBEAN GROWTH STAGE

R3 – R5

CORN GROWTH STAGE

R3 – R5

INSECTS

Stink bugs

WEEDS

Waterhemp and morning glory

DISEASES

Downy mildew is showing up in soybeans and tar spot flaring up in corn especially as it matures.

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