There was no late blight in Manitoba potato or tomato crops in 2018 by 3rd week in September. Late blight has appeared in September in MB in 2013 and 2015.
Harvest of potato crops is in full swing. Rain is forecast in the coming few days and may disturb harvest in some fields. Irrigated fields are reporting good production.
The season was remarkable for very low aphid numbers, low levels of early blight, but wide spread Verticillium wilt and earlier than normal in many fields. Black dot incidence was also extensive.
This is the last report for 2018 season.
I take this opportunity to thank industry agronomists – Leon Jarvis & Landon Thomson (Simplot), Doug Pryor & Darren White (Delta Ag), Steve Saunderson (Choice Agri), Ron Lintott, Trevor Thornton (Crop Care), Cole Ritchie (McCain Foods), Zack Frederick (MHPEC), various farms for in-season updates on crop & pest information, disease samples and support for the aphid, ECB and potato psyllid monitoring programs.
Special thanks to my summer student, Corinne Girouard and other MB Agriculture staff - Tracey Cummer, Tom Gonsalves, Manika Pradhan; AAFC staff Curtis Cavers and Danny Bouchard.
Finally a big thanks to WIN (Weather Innovation Consulting LP) for maintaining the website www.mbpotatoes.ca and support for late blight forecasting.