I'm no expert on any of this stuff and I'm no hard core anything either but throwing sevin dust around, just in case, doesn't sound like that great an idea.

If you must use sevin, consider making it a spray. Its easier to use less and get more even coverage.

Your bees may thank you.

There is a tomato pest and disease forum linked at the top of the page with lots of good reading to help you diagnose this and many other problems.

leaves of our big boy tomato looked like they were curling up

*****

Many stresses such as too hot, too cold, too wet, too dry, or a heavy fruit burden can cause curled leaves. And most modern F1 hybrids have curled leaves naturally.

Not all varieties respond to those stresses the same way.

I ignore curled leaves until and unless I see further symptoms.

Carolyn

I'm having the same problem on 2 different plants in 2 different gardens...one Caspian Pink and a Cherokee Purple..
Both are badly stunted and no blossoms..leaves are all curled up... and almost folding inside out..but the plants next to them are fine. Same watering regimen for all..Granted that my bhn444 does have some curled leaves but as it was mentioned they just do that, and it has tons of toms coming on. I'll take some pics tomorrow..

Happy Gardening..

here's the caspian pink...sick looking
{{gwi:1339042}}

leaves all curled up and no new growth,,

here's the cherokee purple...same symptom..different garden.

{{gwi:1339043}}

Seeing how it's 2 toms of 35 that has this condition, I'm assuming the others will be fine..my wife wants me to wait to see what happens, but I'm thinking uprooting. The leaves are literally turning inside out..hmm..

Not even your topic....but I noticed your plant tag is a Chef Jeff. Cheff Jeff is taking over here in the Houston area. I will NOT buy/grow these at all. They were terrible for me ( all except their Arkansas Traveller). I researched and found out they are grown/raised in Michigan. I just won't grow anything that is not grown in our region and zone. http://www.hybels.com/chefjeff.html
Some people are trying to "eat local". i am trying to grow local too...but I do buy seeds from Baker Creek, Seed Savers and plants from Petals from the Past ( a nursery inthe South)
So anyway I don't know what the problem is but Texas A&M has awesome plant files// check out:
http://plantpathology.tamu.edu/Texlab/Multicrop/curlytop.html
Your plant looks like Curly Top virus.

Here is a link that might be useful: texas A&M Curly top

Does the wilt recover by sun-up? Then get worse as the day goes on?

Very observant..yes..Chef Jeff..bought 2 cherokee purple..only one is doing good,,this is the other,,and bought one Caspian Pink...it's sick,,it's also a Chef Jeff..
timmy..these toms look like this 24 7...they are very sick..
I bought other Chef Jeff toms that are doing fine...
Aunt Ruby's German Green, Whopper, Box Car Willie, Amish Paste..and Black Krim.,,can't imagine why these would be the black sheep..pardon the pun.

Years ago I grew several "Gregori Altai" plants in my small pot garden... Some grew out to have normal leaves, and others looked sickly with curly leaves and sparse foliage. Though I never launched a science project to find the cause, the consensus of opinion was that my plants' fates were sealed by their genetics. A fair number of Gregori Altai's "just do that." My readers chimed in on this, accordingly.

And I observed the phenomenon in more than one year. Furthermore, the differing plants were side-by-side, so a virus could have afflicted the yet-to-be infected plant. This didn't happen. And there was no "gradient" of affliction across any one plant. The whole plant was simply afflicted.

My point is that, though we might be growing several specimens of Cherokee Purple or whatever, the plants are not genetically identical... unless you slip them.

And, if your curly specimen is afflicted with a virus, the slip thereof will likely also be similarly afflicted. So slipping plants does not isolate the genetic factor, either, from the environmental. Nature and nurture remain intertwined.

But bear in mind that genetic variety exists within a tomato strain. They are dehybrized for the conspicuous traits of the strain, not beyond that. IOW, their genome is not entirely homozygous.

This is my personal observation, from what I have read. I am not running a laboratory here! And, of course, I welcome comments (supportive or otherwise) from such authorities as Dr. Carolyn Male.

Meanwhile, I suppose a curly-leafed plant might produce fruit. But it stands to reason that stunted foliage would support poorly the development of fruit, and render inferior taste.