Issue 10, June 27, 2016

Modified Growing Degree Days (Base 50°F, March 1 through June 23)

Station Location

Actual Total

Historical Average (11 year)

One- Week Projection

Two-Week Projection

Freeport

1061

894

1217

1371

St. Charles

1001

843

1150

1299

DeKalb

1098

955

1257

1412

Monmouth

1252

1018

1411

1571

Peoria

1265

1070

1433

1604

Champaign

1277

1106

1450

1625

Springfield

1443

1196

1623

1809

Perry

1390

1113

1555

1726

Brownstown

1390

1270

1573

1763

Belleville

1652

1284

1834

2022

Rend Lake

1650

1392

1840

2035

Carbondale

1548

1315

1724

1909

Dixon Springs

1546

1387

1725

1912

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 Department of Crop Sciences at the University of Illinois and the Illinois Water Survey). (Kelly Estes)

Author:
Kelly Estes

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