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Fusarium Head Blight (Scab) Update (06/16/16)

Small grain growth stages vary throughout the state.

Fusarium Head Blight (Scab) Update

Small grain growthppth.friskop.1 stages vary throughout the state. Most of the winter wheat is at flowering or has flowered, a few spring wheat fields have headed and early-seeded barley is also starting to head. Scab risk is low for most of the state with a few pockets of elevated risk (Figures 1 and 2). Rain is forecasted in the next seven days for most areas in the state and this may increase scab risk. Monitor the growth stage in small grain fields, pay attention to the weather and consider fungicide applications if conducive scab conditions are apparent in your area. Remember the best time to apply a triazole fungicide in wheat is when most of the field is at early flowering and for barley at full head emergence. However, recent NDSU research has shown that fungicide applications made up to 7 days past early flowering (or heading in barley) will suppress scab and DON.

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Andrew Friskop

Extension Plant Pathology, Cereal Crops

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