Welcome back to the next VCR of 2025!
Currently most counties are slightly above their 10 year average GDD, with Norfolk, Sudbury, Timiskaming, and Thunder Bay trending at their 10 year average.
Pest Degree Day Forecasting
| County | Carrot Rust Fly | Onion Maggot | Carrot Weevil | Aster Leafhopper | Tarnished Plant Bug | Cabbage Maggot | Seedcorn Maggot | European Corn Borer |
| THRESHOLD | 329-395, 1399-1711 | 210-700, 1025-1515 | 138-156, 455+ | 128+ | 40+ | 314-398, 847-960, 1446-1604 | 200-350, 600-750, 1000-1150 | See legend below |
| Bruce*** | 1690 | 1551 | 1161 | 931 | 625 | 1285 | 1551 | 824 |
| Chatham-Kent* | 2054 | 1901 | 1467 | 1210 | 864 | 1604 | 1901 | 1089 |
| Durham*** | 1918 | 1776 | 1378 | 1129 | 802 | 1507 | 1776 | 1014 |
| Essex* | 2188 | 2033 | 1592 | 1324 | 957 | 1734 | 2033 | 1197 |
| Huron*** | 1839 | 1693 | 1292 | 1053 | 736 | 1419 | 1693 | 944 |
| Kemptville*** | 1901 | 1760 | 1359 | 1112 | 789 | 1489 | 1760 | 1000 |
| Lambton** | 2005 | 1853 | 1428 | 1176 | 841 | 1565 | 1853 | 1059 |
| Middlesex** | 2023 | 1874 | 1449 | 1190 | 848 | 1586 | 1874 | 1071 |
| Norfolk** | 1943 | 1793 | 1368 | 1114 | 783 | 1504 | 1793 | 997 |
| Peterborough | 1806 | 1664 | 1263 | 1023 | 704 | 1392 | 1664 | 912 |
| Renfrew | 1918 | 1780 | 1383 | 1143 | 824 | 1512 | 1780 | 1031 |
| Simcoe*** | 1840 | 1698 | 1305 | 1065 | 754 | 1431 | 1698 | 957 |
| Sudbury*** | 1557 | 1434 | 1083 | 873 | 586 | 1196 | 1434 | 775 |
| Thunder Bay | 1376 | 1258 | 927 | 722 | 447 | 1032 | 1258 | 626 |
| Timiskaming*** | 1478 | 1357 | 1020 | 817 | 535 | 1127 | 1357 | 719 |
| Wellington Centre** | 1796 | 1654 | 1254 | 1013 | 698 | 1384 | 1654 | 904 |
| Wellington North** | 1810 | 1669 | 1268 | 1036 | 720 | 1397 | 1669 | 928 |
*- Bivoltine region for ECB. First Peak Catch: 300-350 DD, Second Peak Catch 1050-1100 DD
**- Overlap region for ECB. First Peak Catch: 300-350 DD Second Peak Catch 650-700 DD, Third Peak Catch 1050-1100 DD
***-Univoltine region for ECB. Peak Catch 650-700 DD
Use these thresholds as a guide, always confirm insect activity with actual field scouting and trap counts
Select a region below for the latest weather, crop and pest degree day information:
Bruce
Chatham-Kent
Durham
Essex
Huron
Kemptville
Lambton
Middlesex
Norfolk
Peterborough
Renfrew
Simcoe
Sudbury
Thunder Bay
Timiskaming
Wellington Centre
Wellington North
