Omelet wrote:
In article ,
zxcvbob wrote:

Omelet wrote:
In article ,
zxcvbob wrote:

Me neither! But that black growth sounds suspiciously like blight -
which no amount of insecticide - or fungicide, for that matter - is
going to cure. If that's really what it is, there isn't much you can do
except remove affected leaves and fruit and hope it only spreads slowly.
However, since blight thrives in humid conditions you should probably
cut down on the spraying too.
I wonder if a sulfur treatment would help?
Bordeaux mixture should work, and it even sticks pretty well through rains.

Bob
I'm not familiar with that. I'll have to google it...

Copper sulfate and slaked lime. I think it's even "organic" approved.

Bob

It makes sense.

I may have to try some of that for the ivy out front.


Your ivy has a fungus? Bordeaux mixture is a fungicide; it sounded like
OP's tomatoes have a blight. Fungicide will help.

BTW, my one tomato plant that's downhill from the compost pile (where
among other things I've been dumping the cat box) is big and robust and
3 times the size of the other tomato plants. It's also the only one
that doesn't have any blight at all. Coincidence?

Bob