Issue 14, August 26, 2013

Modified Growing Degree Days (Base 50°F,  March 1 through August 22)

Station Location

Actual Total

Historical Average (11 year)

One-Week Projection

Two-Week Projection

Freeport

2114

2199

2263

2393

St. Charles

2114

2082

2256

2380

DeKalb

2085

2225

2225

2347

Monmouth

2300

2346

2455

2594

Peoria

2386

2495

2532

2679

Champaign

2485

2566

2653

2805

Springfield

2626

2734

2805

2967

Brownstown

2548

2831

2728

2893

Belleville

2661

2835

2838

3000

Rend Lake

2836

3007

3022

3196

Carbondale

2723

2857

2902

3066

Dixon Springs

2752

2952

2935

3105

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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