Gray wilty leaves on my Paul Robeson seedlings!

[govivo]

Help!
I started, about 6 weeks ago, 5 different varieties:
Golden Jubilee
Cherokee Purple
Paul Robeson
Fletcher
BHN 640 Wilt resistant red tomato

I started them all on the same day.
I moved them under lights as I always do.
The Paul Robeson have a gray looking wilt on the ends of the leaves.
The others are just fine.
What is happening?

[RayR]

Is the wilted area dry and brittle or moist?
Pictures might help.

[govivo]

It was graying edges that were still supple....but now it has turned to yellow and dark brown and is dry.

[gourmetgardener]

Looks like botrytis to me.

http://vegetablemdonline.ppath.corne...o_Botrytis.htm
http://www.plantmanagementnetwork.or...2006/botrytis/

Heirlooms are **extremely** susceptible to many, many fungal diseases. Modern hybrids have resistance to several diseases.

[RayR]

Could be, but I can't make out any sign of sporulation from the pictures which would be gray fuzzy growth on the leaves.
My first guess would be fertilizer burn. What do you feed those things Vivo?

[carolyn137]

Originally Posted by RayR

Could be, but I can't make out any sign of sporulation from the pictures which would be gray fuzzy growth on the leaves.
My first guess would be fertilizer burn. What do you feed those things Vivo?

It doesn't look like Gray Mold to me either, which is often confused with the onset of Late Blight ( P. infestans).

Possibly fertilizer burn, but I've seen something similar with too much water. Were the plants outside and got rained on and exposed to somewhat cool temps?

Gourmet, it's true that modern hybrids have more tolerances bred in for diseases, but those would be the soilborne systemic diseases such as Fusarium, Verticillium, etc., but there is no difference between hybrids and most OP's, with few exceptions, to THE most common diseases of tomatoes world-wide, which are the foliage diseases.

And speaking of the fungal foliage ones only those would be Early Blight ( A. solani) and Septoria Leaf Spot.

There are a few varieties out there that have modest tolerance to Early Blight, but they're of use, really, only to commercial growers where instead of spraying every 4-5 days they can spray every, maybe 7-8 days and with many acres of tomatoes being grown that's a significant cost savings.

[FILMNET]

Could be a combo problem but why are they outside now in PA, It's way to cold now?

[govivo]

I have not even started to fertilize these plants.
They just got transplanted to bigger pots....but the Paul Robeson were already this way....at that point just a gray tinge to the end of the leaves.
I started the seeds in those little peat pots....and they have lived inside until I transplanted them last weekend.
They then went out on the grow tray on an enclosed front porch under lights.
I keep an oscillating fan on them since them for a couple of hours a day for circulation.
But again, they already had that gray tinge when I transplanted them.
And all I used on them was plain well water.
They were under lights since they sprouted.

[govivo]

It is very warm here in PA now....in the upper 50s at night and in the 70s during the day.

[govivo]

And oh, they were just outside for the photos and to catch some rain.
I bring them back in when the temps drop.

[RayR]

Eliminating the other possibilities and the fact that it's only happening with the Paul Robeson's, it may be a seed born pathogen of some sort, what it is I have no idea. Have you grown out plants before from these seeds?

[Tracydr]

I would avoid rain and overhead watering when possible.

[rockhound]

If you haven't fed them at all and used a sterile medium, maybe they need ferts?

[rockhound]

I see now this is an old thread. What did you decide was the problem?