Issue 10, July 14, 2014

Modified Growing Degree Days (Base 50°F,¬† March 1 through July 10)

Station Location

Actual Total

Historical Average   (11 year)

One- Week Projection

Two-Week Projection

Freeport

1499

1249

1659

1820

St. Charles

1299

1183

1451

1605

DeKalb

1296

1313

1451

1608

Monmouth

1448

1382

1610

1776

Peoria

1511

1459

1685

1862

Champaign

1604

1506

1782

1964

Springfield

1762

1617

1950

2139

Brownstown

1712

1698

1900

2094

Belleville

1779

1710

1967

2160

Rend Lake

1900

1835

2065

2295

Carbondale

1851

1731

2038

2230

Dixon Springs

1862

1809

2051

2246

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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