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Help identify a tomato disease?
+4
Lavender Debs
camprn
walshevak
1airdoc
8 posters
Page 1 of 1
Help identify a tomato disease?
I planted 16 tomatoes in a new 8x2' bed with new MM this spring. They are growing like gangbusters and many have set fruit, but in the last 2 weeks I've noted this problem of yellow and black spots developing on the lower leaves of a few of the plants. I was hoping the new MM would allow me to avoid fusarium and verticillium wilt, but I'm afraid that is what I have, although this doesn't look exactly like the images I see online. Can anyone help me positively identify this problem?
Here's a photo of how the problem begins on the bottom leaf:
Here's a photo of the problem more fully involving a larger leaf:
I see that it can also affect the leaf stem, as well:
Do you know what this is and if there is anything I can or should do about it?
Here's a photo of how the problem begins on the bottom leaf:
Here's a photo of the problem more fully involving a larger leaf:
I see that it can also affect the leaf stem, as well:
Do you know what this is and if there is anything I can or should do about it?
1airdoc- Posts : 188
Join date : 2011-05-04
Location : 7a (Northern middle Tennessee)
Re: Help identify a tomato disease?
It does look like a blight and somebody else will have to help you out. A trip to the County Extension office might help you and they like to keep track of any disease showing up in the area.
Did you start your own seedlings or buy them?
Kay
Did you start your own seedlings or buy them?
Kay
A WEED IS A FLOWER GROWING IN THE WRONG PLACE
Elizabeth City, NC
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walshevak
Certified SFG Instructor- Posts : 4370
Join date : 2010-10-17
Age : 81
Location : wilmington, nc zone 8
Re: Help identify a tomato disease?
UGH! Sorry to see this Doc. That looks like Early Blight, the spot on the leaves and stems. It's not a definitive diagnosis, but that's what it looks like to me. You want to carefully remove all the effected leaves and stems and bag them right there, do not let them fall to the ground. Throw the bag in the trash. After pruning, wash your hands and clippers, disinfect the clippers with alcohol and change your clothing; You understand infection protocol. There is plenty to read on the web about treatment. Contact your Extension Service Ag Agent and if you have a sample show it to them. They will want to know there is blight around and may be able to offer you some advice on how you can extend the life of your tomato plants. It may be late enough for you that you may still get a harvest.
Last year my main crop of canning tomatoes had early blight, but it was late enough into the season that I had good fruit set. I did have to harvest the fruit early and let it ripen on a shelf on the porch.
This is a good reason to prune all lower leaves of the tomato plants to allow for good ventilation through the foliage.
http://www.ppdl.purdue.edu/PPDL/expert/tomato-blight.html
http://ag.arizona.edu/pubs/garden/mg/vegetable/tomatoes.html
Last year my main crop of canning tomatoes had early blight, but it was late enough into the season that I had good fruit set. I did have to harvest the fruit early and let it ripen on a shelf on the porch.
This is a good reason to prune all lower leaves of the tomato plants to allow for good ventilation through the foliage.
http://www.ppdl.purdue.edu/PPDL/expert/tomato-blight.html
http://ag.arizona.edu/pubs/garden/mg/vegetable/tomatoes.html
43 years a gardener and going strong with SFG.
https://squarefoot.forumotion.com/t3574-the-end-of-july-7-weeks-until-frost
There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau
https://squarefoot.forumotion.com/t1306-other-gardening-books
Re: Help identify a tomato disease?
Do what camp suggests .......but if they are willing, let the tomato grow.
The PNW is so wet and (for the last two years) cold in spring that I get leaves that look like your pictured leaves every spring on some heirlooms. I panicked when I first saw it. As summer continued the problem went away and I got tomatoes. These days I call that "water spots" BUT I still try to keep everything clean.
BTW did you buy that plant or grow it from seed? I ask because I do not panic about home grown plants.
Debs.....hoping the best for your soups, sauce and salads.
The PNW is so wet and (for the last two years) cold in spring that I get leaves that look like your pictured leaves every spring on some heirlooms. I panicked when I first saw it. As summer continued the problem went away and I got tomatoes. These days I call that "water spots" BUT I still try to keep everything clean.
BTW did you buy that plant or grow it from seed? I ask because I do not panic about home grown plants.
Debs.....hoping the best for your soups, sauce and salads.
Re: Help identify a tomato disease?
This is appearing on plants I purchased. I planted a few others from seed; they are much smaller at this point, but appear to be unaffected. Not all the plants I purchased are affected.
1airdoc- Posts : 188
Join date : 2011-05-04
Location : 7a (Northern middle Tennessee)
Re: Help identify a tomato disease?
Incidentally, early on I watered the tomatoes from above, but after a few weeks I only watered from the ground (using a soaker wand) or by using a soaker hose that is in place in the bed, and I mulched with straw to minimize splashing.
1airdoc- Posts : 188
Join date : 2011-05-04
Location : 7a (Northern middle Tennessee)
Re: Help identify a tomato disease?
I have some level of blight every year. Tomatoes will usually produce _some_ tomatoes even though they are sick.
Here are some practices to keep it from taking over your garden...
Keep plants trimmed at the bottom. After your plants bloom, prune leaves below the first blossom. I always trim anything that touches ground.
I spray the plants and the ground with Neem Oil. This is an organic antifungal.
Water underneath, if possible. Soaker hoses are good.
Here are some practices to keep it from taking over your garden...
Keep plants trimmed at the bottom. After your plants bloom, prune leaves below the first blossom. I always trim anything that touches ground.
I spray the plants and the ground with Neem Oil. This is an organic antifungal.
Water underneath, if possible. Soaker hoses are good.
Squat_Johnson- Posts : 440
Join date : 2010-05-25
Location : Beaver Dam, Kentucky, zone 6a
Re: Help identify a tomato disease?
Incidentally this is a similar disease to Late Blight that caused The Great Hunger, Ireland's potato famine.
Last edited by camprn on 5/21/2012, 12:10 pm; edited 1 time in total (Reason for editing : correction of factual errors)
43 years a gardener and going strong with SFG.
https://squarefoot.forumotion.com/t3574-the-end-of-july-7-weeks-until-frost
There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau
https://squarefoot.forumotion.com/t1306-other-gardening-books
Re: Help identify a tomato disease?
Just keep trimming & follow the advice given above.
Blight generally wont shut you down (although the stem discoloration in your pics worries me more than the leaves), but if you don't clean your tools between plants, you'll run the chance of spreading it around yr garden.
As metioned above ... bag it & trash it, burn it, etc
I honestly can't remember the last time I grew a "blight free" crop of Tom's ...so don't lose hope
Blight generally wont shut you down (although the stem discoloration in your pics worries me more than the leaves), but if you don't clean your tools between plants, you'll run the chance of spreading it around yr garden.
As metioned above ... bag it & trash it, burn it, etc
I honestly can't remember the last time I grew a "blight free" crop of Tom's ...so don't lose hope
acara- Posts : 1012
Join date : 2010-08-27
Age : 55
Location : Wesley Chapel, Florida (Zone 9)
Re: Help identify a tomato disease?
I'll follow the advice about trimming up my leaves. It seems to me that the square foot method helps create an ideal environment for this disease, since the plants are all so close together. I've also read that sulfur spray or dust may help keep the disease from spreading, so I think I may try that, as well. The unaffected parts of the plants and the uninfected plants seem very robust, so I'm hoping they'll continue to do well.
1airdoc- Posts : 188
Join date : 2011-05-04
Location : 7a (Northern middle Tennessee)
Re: Help identify a tomato disease?
Are you growing determinate or indeterminates? And what is your spacing with them?
cheyannarach- Posts : 2035
Join date : 2012-03-21
Location : Custer, SD
Re: Help identify a tomato disease?
I am not an expert but have read a lot this year about tomatoes. It is important that you have good air circulation. If you have indeterminate tomatoes you should pinch off any growing stems in between the main stem and a side shoot (in the crotch).
From those pictures I think I had the blight on pepper plants (can't remember if it was early or late). I should have done more research then. This has been some great advice from all of you!
From those pictures I think I had the blight on pepper plants (can't remember if it was early or late). I should have done more research then. This has been some great advice from all of you!
Triciasgarden- Posts : 1633
Join date : 2010-06-04
Age : 69
Location : Northern Utah
Re: Help identify a tomato disease?
I typically prune mine, quite vigorously
43 years a gardener and going strong with SFG.
https://squarefoot.forumotion.com/t3574-the-end-of-july-7-weeks-until-frost
There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau
https://squarefoot.forumotion.com/t1306-other-gardening-books
Re: Help identify a tomato disease?
My tomatoes are indeterminate. I am growing them 1/square, and pruning them to a single vine per plant (on one one side of the bed) or to two vines per plant (on the other side of the bed). The difference was intended to see if 1 vine vs 2 vines made any difference in production or quality of fruit. I am using a string trellis that is 6 feet tall. Here's a photo from this afternoon, after I trimmed up the bottom leavds :
1airdoc- Posts : 188
Join date : 2011-05-04
Location : 7a (Northern middle Tennessee)
Re: Help identify a tomato disease?
Wow that picture make them look quite impressive. I would dig in there are remove all the suckers like Tricia said, it would help quite a bit with air circulation! Good luck!
cheyannarach- Posts : 2035
Join date : 2012-03-21
Location : Custer, SD
Re: Help identify a tomato disease?
Lookin' good Doc! Here is what mine looked like last year during the blight fight.
43 years a gardener and going strong with SFG.
https://squarefoot.forumotion.com/t3574-the-end-of-july-7-weeks-until-frost
There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau
https://squarefoot.forumotion.com/t1306-other-gardening-books
Re: Help identify a tomato disease?
Your tomato plants are beautiful 1airdoc! Campryn I like the look of all the air circulation you got with your tomatoes last year. They look so healthy and prolific! Thank you all for showing your photos, it always inspires me!
Triciasgarden- Posts : 1633
Join date : 2010-06-04
Age : 69
Location : Northern Utah
Re: Help identify a tomato disease?
I followed the advice and cut back the bottom leaves from all the plants up to about 8in or so, carefully rinsing the scissors in bleach water after each cut and disposing of the leaves far, far away from the garden and the compost pile. In the four days since, I have seen minimal (almost no) progress of the blight onto other leaves. I'll keep my fingers crossed!
1airdoc- Posts : 188
Join date : 2011-05-04
Location : 7a (Northern middle Tennessee)
Re: Help identify a tomato disease?
Good luck Doc, my fingers are crossed for you too!
43 years a gardener and going strong with SFG.
https://squarefoot.forumotion.com/t3574-the-end-of-july-7-weeks-until-frost
There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau
https://squarefoot.forumotion.com/t1306-other-gardening-books
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