Issue 13, August 9, 2013

Modified Growing Degree Days (Base 50°F,  March 1 through August 8)

Station Location

Actual Total

Historical Average   (11 year)

One-Week Projection

Two-Week Projection

Freeport

1855

1903

2003

2151

St. Charles

1860

1800

2001

2142

DeKalb

1854

1942

1996

2136

Monmouth

2047

2043

2198

2350

Peoria

2100

2169

2262

2425

Champaign

2185

2232

2352

2518

Springfield

2328

2379

2505

2682

Brownstown

2267

2472

2447

2626

Belleville

2371

2478

2550

2728

Rend Lake

2517

2636

2703

2889

Carbondale

2411

2501

2589

2768

Dixon Springs

2434

2589

2616

2797

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 are 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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