Member discussion regarding the methods, varieties and merits of growing tomatoes.
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September 3, 2016 | #1 |
Tomatovillian™
Join Date: Jan 2009
Location: Edina, MN (Zone 4)
Posts: 945
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Black Spots on Tomatoes
Can anyone identify what is going on?
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September 3, 2016 | #2 |
Tomatovillian™
Join Date: Nov 2011
Location: ohio
Posts: 4,350
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did you get hit with hail? that doesn't look like disease to me.
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carolyn k |
September 3, 2016 | #3 |
Tomatovillian™
Join Date: Jun 2012
Location: Illinois, zone 6
Posts: 8,407
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Looks like a worm took a bite, and now it is starting to rot around the damage.
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September 3, 2016 | #4 |
Moderator Emeritus
Join Date: Jan 2006
Location: Upstate NY, zone 4b/5a
Posts: 21,169
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My suggestion is typical anthracnose which happens for many when the nights start getting colder and/or late ripening fruits..
https://www.google.com/#q=anthracnose+of+tomato&hl=en Look at the concentric circles inside the lesions you show,which is typical of anthracnose. Carolyn
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Carolyn |
September 12, 2016 | #5 |
Tomatovillian™
Join Date: May 2009
Location: CT
Posts: 219
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Agree, that looks like anthracnose in the third pic especially.
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September 12, 2016 | #6 |
Tomatovillian™
Join Date: Nov 2011
Location: Omaha Zone 5
Posts: 2,514
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I have anthracnose on one plant. Bad too, I should call the darn thing. When I see it on supermarket tomatoes I know its been there too long for me. With regards to the blemished unripe fruit, I am guessing it is critter damage. Is there any outward sign of anthracnose on unripe fruit?
- Lisa |
September 13, 2016 | #7 | |
Tomatovillian™
Join Date: Aug 2011
Location: Wyoming
Posts: 759
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Quote:
Two small dark spots, formerly worm-entry-door and worm-exit-door. (Unless more than one attacked the same tomato.) By the time you see two little spots like those in your pics, the worm (caterpillar -- baby moth) is long gone. Might be both -- tomato worm then anthracnose establishing at the wound site -- but when I've seen it, typically there are nice looking fruit with just those two small spots . . . and inside the mess the worm left behind while in residence. It's frequently said that they enter at or near the calyx, but in my experience -- and in pics a search should find, they enter wherever they want to without a lot of preference -- but usually just two spots (unless more than one worm was present). Conspicuous surface damage beyond the entry and exit dots is rare, here. Perhaps entry spot and secondary infection liklihood varies with climate or time of season. Fortunately, while they often get a few fruit, the parent moths must be rare, here, (thus far), as they don't normally attack too many. Anyway -- might be worth checking -- if you do a search for some tomato fruitworm damage images you can see if they match what you're seeing. Much empathy, anyway -- it's so frustrating to see nice fruit destroyed. |
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September 13, 2016 | #8 |
Tomatovillian™
Join Date: Feb 2016
Location: Southeastern PA
Posts: 1,420
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It looks like worm damage to me too. I am seeing some of it in my garden too and I have actually seen a couple of worms.
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September 14, 2016 | #9 |
Tomatovillian™
Join Date: Feb 2015
Location: NC - zone 8a - heat zone 7
Posts: 4,919
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From the first picture, with green tomatoes, It seems that it was a worm hole and subsequently started rotting as the air got into it.
If you a cut through the spot it might show something.
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Gardeneer Happy Gardening ! |
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