Issue 9, June 30, 2014

Modified Growing Degree Days (Base 50°F,¬† March 1 through June 26)

Station Location

Actual Total

Historical Average   (11 year)

One- Week Projection

Two-Week Projection

Freeport

1191

939

1346

1500

St. Charles

1008

886

1157

1306

DeKalb

1020

1001

1178

1332

Monmouth

1164

1064

1323

1482

Peoria

1210

1119

1379

1550

Champaign

1281

1156

1455

1630

Springfield

1428

1248

1610

1797

Brownstown

1391

1324

1577

1766

Belleville

1453

1338

1636

1825

Rend Lake

1549

1448

1741

1936

Carbondale

1520

1367

1698

1884

Dixon Springs

1535

1439

1717

1905

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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