Issue 6, June 9, 2014

Modified Growing Degree Days (Base 50°F,¬† March 1 through June 5)

Station
Location

Actual Total

Historical Average   (11 year)

One- Week Projection

Two-Week Projection

Freeport

719

525

833

976

St. Charles

589

496

695

829

DeKalb

609

574

728

876

Monmouth

723

632

846

995

Peoria

757

571

885

1038

Champaign

792

691

926

1086

Springfield

925

766

1064

1229

Brownstown

908

831

1052

1220

Belleville

958

866

1097

1254

Rend Lake

1010

934

1163

1338

Carbondale

1003

885

1147

1311

Dixon Springs

1023

948

1171

1338

Insect development is temperature dependent. We can use degree days to help predict insect emergence and activity. Home, Yard, and Garden readers can use the links below with the degree day accumulations above to determine what insect pests could be active in their area.

GDD of Landscape Pests
GDD of Conifer Pests

Degree day accumulations calculated using the Illinois IPM Degree-Day Calculator (a project by the University of Illinois Department of Crop Sciences and the Illinois Water Survey). (Kelly Estes)

Author:
Kelly Estes

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