@jawa
Black Walnut has a similar story. Very sad. It seems almost impossible to protect species without broad commercial support from global pests. In citrus we have Citrus Greening disease but we’ve poured millions of dollars into prevention to protect crops. Nobody is doing that for chestnut & walnuts https://ucanr.edu/blog/bug-squad/article/sign-times-why-black-walnut-tree-dying
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