Issue 5, May 28, 2013
Modified Growing Degree Days (Base 50°F, March 1 through May 23)
Station Location |
Actual Temperature |
Historical Average (11 year) |
One-Week Projection |
Two-Week Projection |
|---|---|---|---|---|
Freeport |
382 |
369 |
461 |
552 |
St. Charles |
399 |
352 |
472 |
556 |
DeKalb |
405 |
406 |
491 |
588 |
Monmouth |
442 |
459 |
529 |
631 |
Peoria |
472 |
494 |
561 |
665 |
Champaign |
506 |
501 |
601 |
712 |
Springfield |
539 |
561 |
644 |
761 |
Brownstown |
547 |
617 |
657 |
780 |
Belleville |
573 |
647 |
687 |
811 |
Rend Lake |
636 |
700 |
756 |
889 |
Carbondale |
622 |
662 |
737 |
864 |
Dixon Springs |
637 |
717 |
756 |
888 |
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. Of particular interest this week, degree day accumulations are nearing or have reached levels where we could see the beginning of emerald ash borer adult emergence (450-500 DD). Peak adult emergence usually coincides with the accumulation of 1000 DD, which is still several weeks off.
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