Temperature – All regions continue to match or pass their 10 year average cumulative GDD trends except Peterborough which continues to lag behind. Daytime temperatures are expected to be in the mid- to high-20s across the province and feel higher with the humidex. Nighttime temperatures may range from mid- to high-teens to mid 20s.
Precipitation – Essex and Kemptville have exceed their 10 year average cumulative rainfall for July. Durham region and Peterborough have received approximately 3/4 and Norfolk, Simcoe and Sudbury have received more that half. Rain is forecasted for the beginning of the week in many parts of Ontario along with the risk of thunderstorm in some areas. Showers with a risk of thunderstorms are expected again across the province toward the end of the week.
Many specialists are away this week so there are no new updates.
However, you can take a look at last weeks VCR post for some recent updates:
Or this July 26th update on late blight for tomato and potato growers:
Pest Degree Day Forecasting
*NOTE: Data as of July 27, 2022
|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|
*- 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: