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Sunflower Highlights - August 25, 2014

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Managing Sunflower Rust

In the last week, sunflower rust pustules (uredia) have been found in sunflower fields in North Central North Dakota. This stage is the economic stage of sunflower rust, and appears as dusty cinnamon-brown pustules and dusty brown spores. The occurrence of uredia in fields is a couple weeks earlier than last year, and given that the crop is later in some areas, there is cause for concern. Sunflower rust has the ability to be devastating if environmental conditions are favorable and the disease is left untreated. Fortunately, fungicides are available for disease management. Read the full article in the Grower section about what to look for and treatments.

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