Issue 11, July 12, 2013

Modified Growing Degree Days (Base 50° F, March 1 through July 11)

Station Location

Actual Temperature

Historical Average   (11 year)

One-Week Projection

Two-Week Projection

Freeport

1278

1271

1439

1600

St. Charles

1273

1204

1426

1579

DeKalb

1297

1335

1453

1609

Monmouth

1442

1405

1606

1771

Peoria

1471

1483

1646

1823

Champaign

1538

1530

1717

1898

Springfield

1655

1643

1843

2031

Brownstown

1615

1725

1804

1997

Belleville

1699

1736

1888

2080

Rend Lake

1820

1862

2016

2216

Carbondale

1753

1757

1940

2133

Dixon Springs

1768

1836

1958

2153

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).

Author:
Kelly Estes

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