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  1. Mitigating primary infection of Marsssonina blotch is necessary through mid-June. (Photo: K. Peter)
    News
    2026 Disease Update: Bitter Rot and Summer Disease Season
    Date Posted 5/27/2026
    Warm, rainy weather brings the threat of bitter rot, and sooty blotch and flyspeck infections. Marssonina spores are still active. Bacterial spot and cherry leaf spot management are necessary. Growers need to be vigilant during these conditions.
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