Aack. Bacterial canker on tomatoes or something else?

chervena_chuska(6b)July 19, 2011

Hi all,

We had lots of rain and then very dry humid weather the last 3+ weeks. I've been noticing some fungus like spots on my tomatoes and pruning them as well as starting some copper and neem treatment that was keeping things under control.

Today I went out and it seems to have gotten worse in the last few days. The edges of the bottom leaves (old and new) are browning and small spots are appearing and then there is some yellowing and wilt. I also found a suspicious looking pepper.

Can anyone help me diagnose this? What treatment can I do? I sometimes overreact to these tomato diseases so I want to confirm.

Pictures are here on Flickr at the link.

Thank you so much.

Here is a link that might be useful: Spots, leave edge browning

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jean001a(Portland OR 7b)

The narrow off-color leaf edges may be environmental.

Difficult to say what the dark splotchy on the stems are.

Has it progressed to additional leaves? If not, just remove the affected ones.

    Bookmark   July 24, 2011 at 10:48PM
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missingtheobvious(Blue Ridge 7a)

Some of my tomatoes have the narrow dark leaf-edge problem. I've never seen it before.

I don't see it on the newest leaves, but the middle and some lower leaves. It doesn't seem to spread, and I'm postulating that it's not related to any of the normal yellowing and spotting on the lower leaves. So I'm not worrying about it.

Apparently similar edge damage can occur in other crops with low levels of calcium ... but I doubt that's what's going on here because I haven't seen any blossom end rot.

    Bookmark   July 25, 2011 at 1:15AM
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jean001a(Portland OR 7b)

Low calcium=, when expressed in the leaves, typically aborts tip growth.

    Bookmark   July 25, 2011 at 7:37PM
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missingtheobvious(Blue Ridge 7a)

jean, in the case of my tomatoes, it's not leaf tips but edges. What do you think: does that sound like a lack of calcium?

    Bookmark   July 25, 2011 at 8:43PM
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missingtheobvious(Blue Ridge 7a)

Well, mine is definitely bacterial canker. Two plants for certain.

Never seen it here before (or in Illinois when I grew tomatoes in the Olden Days), so I'll blame Bonnie Plants....

Not happy here.

If anyone else encounters this, here's a good article with some photos:
http://vegetablemdonline.ppath.cornell.edu/factsheets/Tomato_Bacterial.htm

    Bookmark   July 26, 2011 at 11:46AM
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