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Fusarium Head Blight (Scab) Risk for Small Grains (06/30/16)

A significant portion of the small grains in the southern half of North Dakota are entering stages of kernel development.

Fusarium Head Blight (Scab) Risk for Small Grains

A significant portion of the small grains in the southern half of North Dakota are entering stages of kernel development. In the northern tier of North Dakota, barley is heading and hard red spring wheat and durum are in the flowering stages. Rain events over the past week have contributed to the NDSU model showing moderate risk for susceptible varieties along the northern edge of the state (Figure 1). For moderately susceptible varieties, moderate scab risk exists in the areas of Divide, Burke and Cavalier counties (Figure 2). The national scab model predicts a moderate to high scab risk for susceptible varieties areas in Divide, Burke, Williams and Mountrail counties (Figure 3). For moderately susceptible varieties, a pocket of moderate risk exists in northwestern ND. As a reminder, scab resistance in durum is not equal to scab resistance in hard red spring wheat. In other words, a moderately resistant durum is approximately equivalent to a moderately susceptible spring wheat variety. Therefore, when using the models for scab risk in durum, make the appropriate adjustments in regards to variety susceptibility.

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Andrew Friskop

Extension Plant Pathology, Cereal Crop


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