Vegetables and Fruit forum: black spots on tomatoes

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Name: Reid
North Branch, MN (Zone 4b)
Garden Ideas: Master Level Celebrating Gardening: 2015
Sep 1, 2013 8:43 PM CST
What might cause these black spots near the shoulders of these tomatoes? It had been in the mid 90s for ten days, and no rain. Heat stress? I tried to be consistent with water.
Thumb of 2013-09-02/Anderwood/cd861d

Name: Paul Anguiano
Richland, WA (Zone 7a)
GW & DG: tropicalaria
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Sep 1, 2013 9:29 PM CST
Bacterial spots can lead to marks like those, but it's also likely to have affected the foliage. There are a number of insects that tube feed from your fruit, causing black necrotic spots like that as well. In both cases the black is secondary rot from the initial damage to the skin and immediate tissues. Technically, poking the fruit with a pencil a couple weeks before it is ripe can do the same.
Name: Rita
North Shore, Long Island, NY
Zone 6B
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Sep 1, 2013 9:35 PM CST
Unfortunately tomato plants are prone to a long list of fungal diseases. But those spots look like environmental damage to me like bruising.

The WITWIT Badge Mules Forum moderator
Sep 2, 2013 1:00 AM CST
Can you show a picture of the leaves?

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