University of Idaho researchers observed cercospora leaf spot (CLS) in its trial plots at Parma on the 15th of June.
Although where they observed the disease was in a relatively high-risk area i.e. adjacent to a field where CLS was observed in 2022 it seems to be a little more severe than in 2022. Spores of sugarbeet powdery mildew (Erysiphe betae) were detected on the 10 June meaning disease is likely to occur soon if not already.
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Year
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First E. betae spore detection at Parma
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First time visual symptoms observed in Treasure Valley
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Notes
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2018
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June 4th
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June 23rd
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2019
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June 12th
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June 27th
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2020
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June 5th
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June 23rd
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2021
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May 28th
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July 2nd
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Heat dome meant temps likely too high for E. betae
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2022
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June 19th
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June 30th
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2023
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June 10th
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TBC
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