Roma Paste Tomato – Black Rotten Spot
Q: I discovered a black rotten spot in the center of some of my Roma paste tomatoes. What’s going on? How do I prevent it?
A: Black rot is caused by fungi on the outside of a tomato traveling to the inside through skin damage. It can also be caused when the fungus that’s associated with blossom end rot moves into the fruit. The best way to prevent it is to avoid moisture on the fruit. Prune the vine to allow airflow through the plant. Water appropriately to prevent blossom end rot. A couple of fungicides will control the fungus, but not all are reliable. Look for one that has azoxystrobin as an ingredient.
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