Issue 7, June 16, 2014

Modified Growing Degree Days (Base 50°F,  March 1 through June 12)

Station Location

Actual Total

Historical Average (11 year)

One-Week Projection

Two-Week Projection

Freeport

848

639

991

1148

St. Charles

696

602

830

979

DeKalb

716

693

863

1024

Monmouth

837

755

986

1146

Peoria

873

799

1027

1194

Champaign

924

824

1083

1256

Springfield

1062

905

1228

1406

Brownstown

1039

975

1207

1387

Belleville

1094

1005

1251

1426

Rend Lake

1159

1086

1335

1521

Carbondale

1148

1030

1312

1486

Dixon Springs

1170

1096

1337

1514

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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