November 2020, Another Major Autumn Freeze in California Walnuts

Photo 3. Freeze damage and Bot and Phomopsis spore

Photo 3. Freeze damaged limb from a Yuba City Howard orchard on June 6, 2019 following November 2018 freeze damage. Note raised “bumps” on bark and black pycnidia (see arrow) that produce spores below bark typical of Bot and Phomopsis (photo: Janine Hasey).

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