Potatoes!
I’ve been growing white potatoes for a few years, about 60 plants. Each year half my crop is infected with something I cannot understand. Small black spots on the skin portend the much larger black masses within the potato. I cut them out when preparing for dinner and the rest of the potato is fine. What is that stuff and how do I prevent it?
Are you purchasing new disease free potatoes for planting or using leftovers from your prior year harvest?
Blackheart: Caused by oxygen deprivation, usually from flooded soil or improper storage, resulting in a black, tough, or hollow center.
Fusarium Dry Rot: A fungal infection that develops from earlier bruises, leading to brownish-black, shriveled cavities.