Disease Identification - Please

[recruiterg]

Is this something to be worried about? Leaves start with a mottled yellowing, then turn black. The problem occurs primarily on the bottom part of the plant. Growth seems somewhat stunted.

[Gobig_or_Gohome_toms]

The first picture looks like what I have and have had on a few of my plants in the past I have only sprayed the leaves once with a fungicide but it may be time for me to spray again. The second picture is more purplish looking to me so what you are seeing maybe different then me.

[dice]

I get plenty of lower leaves that look like that first picture,
but I have not had any that look like the second (I usually
cut them off and toss them before they get that far). Whatever
it is, the plants usually survive it. They can sit there for weeks
with a few lower leaves looking like the first picture while the
plant just keeps growing.

[Frog]

I have this, I've stripped the leaves, the plants are doing fine.

[hasshoes]

The first one I've seen on pages listed as a deficiency. I don't think there has to be a deficiency in the ground. . . just how the tomato is growing the lower leaves aren't getting as much stuff. I had this when it was raining a ton here. . . just pulled them off and now the plants are fine.

[recruiterg]

I found this on another post and I think it is a nutritional deficiency of either Manganese or Iron. At least I doubt it will kill the plant. found info here: http://vegetablemdonline.ppath.corne...omWiltKey.html

Manganese


a checkerboard appearance of interveinal yellowing beginning on apical leaves and near the main veins leaves

Iron

Ironinterveinal yellowing or whitening beginning on apical leaves with veins remaining greenleaves

[dice]

Iron, probably not, because iron chlorosis starts on the newest
leaves.

Manganese, maybe. I tried giving one tea one year (fairly rich
in manganese), but the plant did not react by greening up
the lower leaves that looked like that (maybe it is permanent
once the leaf gets to that state, even if you supply more of
what it is lacking).

This year I wondered about magnesium deficiency. That did not
seem very likely, because the soil had been amended with
dolomite over the last couple of years and because it has
langbeinite in it as well (sul-po-mag, has lots of magnesium).
According to the description for magnesium deficiency in the
document below, however, a plant can show the symptoms
under some conditions even if the supply of magnesium in
the soil is adequate:

http://www.growtomatoes.com/nutrition.htm