Disease Featured Pest Management Vegetables Weather

VCR – Vegetable Crop Report – May 12th, 2022

The VCR (vegetable crop report) is a weekly update which includes crop updates, weather and growing degree summaries for various vegetable growing regions across Ontario. Continue Reading VCR – Vegetable Crop Report – May 12th, 2022

Temperature: Temperatures continue to rise over the weekend before dropping back into the teens next week. Most counties are at or marginally behind their 10-year GDD averages with the exception of Huron and Durham counties which are slightly ahead. The pest threshold has been reached for onion maggot in Essex and seedcorn maggot is now at threshold in Essex, Chatham-Kent and Norfolk counties.

Precipitation: Most counties may see some rain over the weekend with the possibility of thunderstorms. Most did not experience any significant rainfall over the past week.

*Note: The 10-year average GDD calculation has changed to better reflect the current weather trends. Last week’s GDD graphs have been updated.

Crop Updates

Brassica crops – Transplanting is well underway. While it has not been warm enough for cabbage maggot fly to reach it’s first generation growing degree threshold in any county, seedcorn maggot fly is active in most regions. Dig up wilted transplants and inspect roots for insect damage. If you were unable to attend the 2022 Brassica Crops IPM Scout Training workshop, a recorded version can be viewed below:

Celery – Transplanting is underway across the province. Ensure that there is adequate moisture to get good crop establishment.

Figure 1 – Celery ready to be transplanted – May 10th, 2022.

Garlic – Plants are at an average of 4-7 leaves. Leek moths are active in most regions with the warm night temperatures and will be laying eggs over the next week. Seedcorn maggot damage has been observed in SW Ontario and has reached its first generation threshold in Essex, Chatham-Kent and Norfolk counties. Dig up plants that have wilted leaves to look for seedcorn maggot larvae, wireworms or millipedes.

Figure 2 – Seedcorn maggot larvae found feeding on a wilted garlic plant May 10th, 2022 – Kristen Obeid

Onion – Onions are still being transplanted and direct seeded onions planted last week are starting to emerge in fields with adequate soil moisture. The threshold for the first generation of onion maggot has been reached in Essex county.

Pest Degree Day Forecasting

*NOTE: Data as of May 11, 2022

CountyCarrot Rust FlyOnion Maggot Carrot WeevilAster LeafhopperTarnished Plant Bug Cabbage Maggot Seedcorn MaggotEuropean Corn Borer 
THRESHOLD329-395, 1399-1711210-700, 1025-1515138-156, 455+128+40+314-398, 847-960, 1446-1604200-350, 600-750, 1000-1150See legend below
Essex*292245124733016024555
Chatham-Kent*24520298551912920241
Norfolk**244204102551713320439
Huron***230193103632612819348
Wellington**1961617336129916128
Simcoe County***1941587436109815824
Durham***22218286451011418229
Peterborough193158713779615825
Kemptville***22017783461110717732
Sudbury***967837207497815

*- 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:

Essex County

Chatham-Kent County

Norfolk County

Huron County

Wellington County

Simcoe County

Durham County

Peterborough

Kemptville

Sudbury

Essex County

Go to the Top

Chatham-kent County

Go to the Top

Norfolk County

Go to the Top

Huron County

Go to the Top

Wellington County

Go to the Top

Simcoe County

Go to the Top

Durham County

Go to the Top

Peterborough

Go to the Top

Kemptville

Go to the Top

Sudbury

Go to the Top

0 comments on “VCR – Vegetable Crop Report – May 12th, 2022

Leave a Reply

%d bloggers like this: