Magnesium deficiency? Whenever I've had a plant develop a magnesium deficiency, that's what it looks like. Citrus gets it too, looks just like that, but I don't have a picture handy.

The basic description is that inter-vein areas turn yellow symmetrically on the leaves, starting more on the edges and working to the center vein. Treatment is Epsom salts dissolved in water and applied to the soil.

i don't think it's the magnesium deficiency because that usually affects the older leaves.. whatever deficiency my plants have is affecting mostly the new growth.. the older, already established leaves are normal.

Looks like possible CMV (cucumber mosaic virus) to me.

Dave

actually after looking some more i think i have come to the conclusion that it may be TYLCV (tomato yellow leaf curl virus) and apparently it's the most destructive problem to have with tomatoes.. lucky me!. how unfortunate.

Whatever the problem turns out to be, watering every day doesn't sound like a good strategy to me. Shallow roots, moist soil surface that breeds nasties. Stick your finger in the soil and see if it is moist an inch or two down. If not then water.

At first look, I thought Mg deficiency, but at closer look, you can see distorted stems and leaves, so I am leaning towards Cucumber Mosaic Virus.

I also see quite a bit of leaf miner damage. I wonder if they are vectors?

WoW! I am thinking I have this CMV too! I have been fighting aphids on my cucumbers too.

I am thinking now I might re-think planting cucumbers close to my tomato plants...what do you think?

it's definitely TYLCV.. the plant still grows if infected with CMV.. my plants have all completely stopped growing the moment the leaves showed signs of this problem.

I was thinking thinking more along the lines of root knot nematodes. Or edema with heat stress. Uneven drainage with overwatering can do that as well.

Ah, good catch everyone. Thousand lashes with a wet noodle for me.

Nobody mentioned herbicide !!

Sey

Because it doesn't have the look of herbicide damage. The discoloring is too diffuse and the yellowing is on the wrong parts of the leaf.

I'll stick with CMV given the diffuse effect and the stunted growth pattern. TYLCV usually has a more intense stem curling and takes the plant down quickly.

Dave

Earlier it eluded me as what it was that a friend of mine had a problem with last year. He lives outside of Tampa in Hudson so it is close to where the OP is. It was spider mites. If you have fine looking webbing that is making the leaves curl in it is spider mites. If it is them there are ways of treating for them. Though sometimes they damage things enough that it may be a better bet to pull the plant, and start over. That is your choice.

If you take off one of the bad leaves, and shake it over a piece of white paper they will fall off onto the paper. Or you can look at the bottom of the leaf with a magnifying glass.

I have seen most of the it may be a virus cases turn out to be pest infestations.

it's not CMV.. google cmv and tylcv and check out images.. apparently it's a whitefly problem.. it got to all of my plants and they're all stunted and blooms have fallen off and they're done for.. look up TYLCV people!. it's destructive as all hell.. was first found in florida in 97.. it will wreak havoc on tomatoes across all hot and humid areas of the country.. i'm in new port richey, about 30 minutes from hudson. everyone needs to be aware of the whitefly problem because it will take down all of your tomato plants as is happening to me.. i'm practically starting over with new plants.. might get too hot by July-August but i'm going to try growing tomatoes in pots instead of the ground.. and i will keep them in my lanai to see if i can avoid the whitefly problem..

Whiteflys will still find them even under the lanai. You need to spray as soon as you see them, and then do it for three weeks straight in order to get the new flies that hatched from the eggs.

Have you seen whiteflys? You definitely have / had leaf miners.

the leaf miners were the least of my worries.. the only way tomatoes get TYLCV is by whiteflies so that had to be the problem.. i sprayed stuff but not early enough and all my tomatoes are dying now.. it's sad, i had 3 Cherokee purples that I was excited about and now all the stores that sell them sold out of the Cherokee purples..