Manitoba potato disease report, September

Manitoba Potato Weather Network
September 20, 2017
By Manitoba Potato Weather Network
Manitoba potato disease report, September
Photo by Agence Producteurs Locaux Damien Kühn on Unsplash
All the isolates of late blight -Phytophthora infestans tested were US-23 for 2017. No new late blight incidence has been reported in the last week, which has generally been dry, warm and windy. The 7-day DSV accumulation for late blight risk has been essentially minimal. Harvest has begun in many areas.

The warm conditions has slowed the harvest of some processing fields, to prevent bringing warm tubers into storage. The seasonal accumulated precipitation has been 50-70% of normal in the potato growing areas (Fig1). The soils are generally on the dry side (Fig 2), but irrigated fields have sufficient moisture for a good harvest. READ MORE

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