VCR – Vegetable Crop Report – July 14th, 2022

Temperature – Almost all regions continue to match or surpass their 10 year average GDD except for Peterborough which has fallen fairly below it’s average. Huron county and Sudbury are also marginally below. High daytime temperatures are forecasted throughout the week ranging in the mid-twenties to thirties. Nighttime temperatures are expected to range in the high-teens to low twenties for much of the province.

Precipitation – All regions saw at least a small amount rain over the last week but Kemptville received a substantial amount and is now at over half of it’s 10 year precipitation average. Rain showers and a risk of thunderstorms are forecasted over the weekend. Regions other than those in southwestern Ontario may also see showers and thunderstorms towards the middle of the week.

Crop Updates

Cucumbers – Cucurbit downy mildew was identified in East Elgin on July 14, 2022. This is the first confirmed case of downy mildew in cucumbers this year. The risk of further infections is now high. All growers should begin using downy mildew targeted fungicides.

Garlic – As harvest approaches, monitor the number of leaves that senesce. The ideal time to harvest porcelain cultivars (such as the cv ‘Music’) is when 50% of the leaves have senesced / turned yellow. Since it takes several days to harvest, many start harvesting at 40% and by the time the crop is fully harvested it may have reached 70%.

There are still a few spots remaining for the next Garlic Production and Pest Management workshop near Janetville, ON, that takes place Friday, August 19th from 9:30-4:30. Register by calling 1-877-424-1300 or by filling out this online form: https://survey.clicktools.com/app/survey/go.jsp?iv=1y59n0qcz8rld.

Pest Degree Day Forecasting

*NOTE: Data as of July 13, 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
Essex*	1404	1294	984	807	576	1083	1294	725
Chatham-Kent*	1235	1130	840	674	434	933	1130	600
Norfolk**	1233	1130	839	666	419	933	1130	587
Huron***	1065	965	686	523	294	774	965	448
Wellington**	1058	960	683	522	297	772	960	452
Simcoe County***	1066	967	695	532	310	782	967	460
Durham***	1137	1033	748	582	341	839	1033	504
Peterborough	995	896	621	465	248	708	896	393
Kemptville***	1149	1043	760	598	357	847	1043	522
Sudbury***	913	831	598	455	248	674	831	390