Is this grey spot?

[Muslickz]

I think it's grey spot.. I think it might be but only 85% sure...

It's on my Better Boy F1 Hybrids. I thought they were resistant?

Tomatoes 'Better Boy F1'

Type:AnnualUSDA hardiness zones:-Days to maturity:72 - 82Type:StandardSeason:Main-Season Hybrid. Main-season standard tomato with deep-red, 1-pound or more, firm, globe-shaped, crack- and blemish-free fruit. Indeterminate plants. Resistant to alternaria stem canker, fusarium wilt 1, gray leaf spot, nematode and verticillium wilt.


Any Experts on board? Could use a knowledgeable gardener...





Could it possibly be Early Blight?

Any Suggestion on how to treat?

Thanks in Advance!

-Mike

[RayR]

That's not Early Blight or Septoria.

[Muslickz]

So grey spot ya think?

-Mike

[RayR]

Kinda looks like grey spot to me, but I've never had any experience with it. Grey Spot is a foliar disease only, so if you don't have any spots on the fruit, it can't be mistaken for one of the bacterial diseases.

[carolyn137]

Originally Posted by Muslickz

I think it's grey spot.. I think it might be but only 85% sure...

It's on my Better Boy F1 Hybrids. I thought they were resistant?

Tomatoes 'Better Boy F1'

Type:AnnualUSDA hardiness zones:-Days to maturity:72 - 82Type:StandardSeason:Main-Season Hybrid. Main-season standard tomato with deep-red, 1-pound or more, firm, globe-shaped, crack- and blemish-free fruit. Indeterminate plants. Resistant to alternaria stem canker, fusarium wilt 1, gray leaf spot, nematode and verticillium wilt.


Any Experts on board? Could use a knowledgeable gardener...





Could it possibly be Early Blight?

Any Suggestion on how to treat?

Thanks in Advance!

-Mike

Mike, I don't know where that Big Boy F1 description comes from but I do trust what Linda Sapp lists at Tomato Growers Supply and the tolerances, for there are no complete resistances listed are:

V, Verticillium
F, race 1 of Fusarium and races 2 and 3 not mentioned and I think you're in Fl, if I go back to look I lose this post, and race 3 is quite common in FL
N, Root Knot Nematode

No mention of Grey Spor oe Alternaria Stem Cnaker, a systemic disease more commonly found in CA.

There are NO disease RESISTANTces, just Tolerances, and the tomato industry was behind making that change since there were several large scale commercial farmers who sued b'c they bought what was represented as RESISTANT tomato varieties to this or that, and they weren't.

IS it Gray Spot? I'm not sure and would look for the typical areas of yellow that surround the lesions on the upper leaf surface/

If it were me I think I'd also consider Bacterial Speck and/or Spot, both bacterial foliage diseases. Speck usually has yellow areas around the spots as the disease progresses while Spot does not. Plenty of pictures to look at and at the top of this Forum there are links, and I think the best ones to look at are the Cornell one and TAMU/

[Muslickz]

Awesome, Thanks Guys/Gals!

I will continue to look, here is another photo or two if it will help. These plants are young, and it's hot and humid here in central Florida right now





I have a whole fall crop in seed trays now, I am also going to rotate area's for fall.

I also selected "Mountain Magic" For my fall crop as they seem to be a bit more Resistant.

Again, Thanks for any insight in advance!- I'll be hunting this one down all evening

-Mike

[Muslickz]

Ok, I am pretty sure this is it..

Grey Leaf Spot.. The Description is Perfect.

GREY LEAF SPOT
Symptoms: Older leaves develop small dark spots on top and underside of leaves. The spots get larger and turn a grey-brown color, after which the middle of the spots split and fall out.


-Mike