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EC Nebraska | We were hit really hard in 2023, including on no-till fields.
University researchers setup in one of our worst hit fields this year. heavy sclerotia pressure, you could find them easily in hot spots across the field.
Very little infection in the beans this year.
The researchers said their best guess came from observing mushrooms after early rains in May and June. We'd have a few days of rain and mist, followed by a few days of hot dry weather.
Had at least three of those cycles before the beans flowered.
As far as the cameras could tell, the sclerotia "bloomed" only once. Each cycle of wet would trigger more sclerotia to shoot up mushrooms, and then the hot dry would kill them. There would be more mushrooms the next wet cycle, but from new sclerotia, not the ones that shot mushrooms earlier.
By the time the beans were flowering, the sclerotia load was greatly reduced. There was still infection in the beans, but it was a couple plants here and there, not half the field like it had been in 2023. (estimate more than 60% yield loss in 2023.)
That might explain a benefit of early cover crops. Wouldn't a good stand of early rye create a humid surface environment? Perhaps that triggers the mushrooms early, then the mushrooms die if the rye is killed soon enough to dry out the surface before the beans bloom.
Just a thought. | |
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Strategies for White Mold in Soys.
