How To Diagnose a Tomato Disease

tomato mosaic

Tomato mosaic. Photo: Texas A&M.

It’s that time of year in the Northern Hemisphere. If you’re lucky you’ve got tomatoes. If you’re unlucky you’ve got tomato diseases.

When I’ve got a tomato problem I turn to Texas A&M AgriLife Extension’s Tomato Problem Solver. What makes it handy is all the pictures. They’ve pretty much covered every tomato disease in pornographic detail.

How are your tomatoes doing? Any problems?

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  1. Any problems?

    SQUIRRELS! They don’t bother with the cherry tomatoes, thank god, but they haven’t left a full sized tom unbitten yet this season. grrrrr!

    • I feel your pain. They’ve never gone after the tomatoes but they sure love apples.

  2. I started my tomato seedlings in MARCH and with the portlandia gloom they have only really started to take off finally this month with the heat. However some of my plants have a weird leafing issue. It isn’t contagious because i have plants right next to each and it didnt spread, so. I suspect herbicide damage. On the worst plant it has very severe pigtailing of the leaves. They dont even look like leaves anymore, just this fleshy curled tail. I live in a townhouse and for some time I put my repotted seedlings up on the brick wall for maximum sunlight, and i suspect they might have been hit with something. I don’t know why the hell they would spray that crap on the grass in front of our unit, the neighbor’s dog ruins it anyway. I always had this misconception that portland and oregon in general was a progressive and environmentally friendly place, but this state is actually pretty red and conservative (and loves their sprays). :/

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  4. The Tomato Problem Solver is a great tool! Thanks for sharing it. After careful inspection of a bunch of awful things that COULD be wrong with my tomato plants, I feel much better. I have decided they are just suffering from general patheticness, probably due to my late planting, rather than some horrible virus or wilt or something. Or maybe it’s the water. Or not enough fertilizer. Or… Oh well, at least it’s not one of the blights or viruses.

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