VCR – Vegetable Crop Report – May 2nd, 2025

vegetablecropreport

12 months ago

Welcome to the first vegetable crop report of the season!

Crop Updates

Brassica Crops – Transplanting of Brassicas has been ongoing for the past 2 weeks in warmer areas of the province. Some early fields that were planted may show frost damage with the outer most leaves turning purple or yellow. While it has not been warm enough for cabbage maggot fly to reach its first-generation growing degree threshold in any county, seedcorn maggot is active in Essex and Chatham-Kent.

Garlic – The emergence rate across the province has been high with few plants showing winterkill. Winterkill is generally the result of weakened plants due to stem and bulb nematode, late planting (or planting near the soil surface), waiting too long to plant after cracking/splitting. Dig up plants showing signs of stress or wilting now and check for seedcorn maggot larvae feeding on the roots. Nitrogen applications prior to the 5th leaf stage will result in better storage and fewer rough bulbs. Set up leek moth traps now to plot population peaks and determine if / when insecticides are necessary.

Onions – Onion seeding is underway in warmer areas of the province. The first generation of onion and seedcorn maggot has met its threshold in Essex and Chatham-Kent. Register now for the Onion IPM Scouting workshop on Wednesday, May 7^th. Onion insect and pathogen scouting will be the focus of the in-person and virtual workshop. Register Online or call the Agriculture Information Contact Centre at 1-877-424-1300.

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***	134	107	49	27	5	63	107	18
Chatham-Kent*	249	208	110	71	28	135	208	55
Durham***	150	120	57	27	5	74	120	17
Essex*	265	224	126	82	34	154	224	64
Huron***	194	161	88	55	21	108	161	43
Kemptville***	141	113	47	21	4	65	113	14
Lambton**	232	192	104	67	27	129	192	53
Middlesex**	197	163	81	49	15	103	163	37
Norfolk**	222	184	93	56	18	119	184	41
Peterborough	133	103	39	19	4	55	103	13
Renfrew	129	103	42	19	7	59	103	13
Simcoe***	144	114	51	25	3	69	114	17
Sudbury***	38	28	8	3	0	13	28	2
Thunder Bay	20	11	0	0	0	0	11	0
Timiskaming***	33	23	6	2	0	9	23	0
Wellington Centre**	150	121	59	33	7	76	121	22
Wellington North**	160	131	63	39	11	82	131	28