Thank you @Loren for compiling these various lists. The rots here in 8A, west central Georgia, have been the biggest issue. I’ve grown Arkansas Black, two unknown Southern heirlooms, one of which is probably Mammoth Blacktwig, Enterprise, Pink Lady, Liberty, Grimes Golden, and Gold Rush. All of them suffer from summer rots, but Goldrush has been the worst by far. It has become ungrowable here without synthetic sprays, as it will set well, the apples will look great, and then every single one will rot before they ripen. Making sure there is no rotting fruit that overwinters on the ground or tree has not helped. There’s a discussion about Bitter Rot and Marsonnia Leaf Blotch at Marsonnina Leaf Blotch- 2023 - Guides - Growing Fruit you may find interesting.
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