Ask a Question forum: Is this fusarium or verticillium wilt?

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Name: Sammy
Philadelphia, PA
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skhetan
Mar 18, 2018 3:26 PM CST
All – Please see the attached photos. I'm growing these Early Girl tomatoes indoors, they are supposed to be fusarium and verticillium wilt. It certainly does look like that though… can anyone confirm? There is yellow mottling and some dotting, and the leaves are shriveling from the bottom up.

I DID start using copper fungicide in the soil and foliage in recent weeks and that seems to have abated the wilt somewhat… newer foliage looks healthier and the wilt isn't spreading much / as quickly.

Any thoughts on diagnosis and further treatment are much appreciated!

Thank you!
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Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
Mar 18, 2018 4:07 PM CST
Where indoors are you growing your tomatoes? It looks like a fungal/mildew problem from too high humidity. That could be why the fungicide is working.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

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Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Mar 18, 2018 4:27 PM CST
I think it's unlikely that it would be Fusarium or Verticillium wilt indoors, assuming you used a good quality commercial potting mix and no garden soil. Have you checked for spider mites:

http://www.missouribotanicalga...

And considered nutrient deficiency:
http://www.haifa-group.com/kno...

Also presumably they are under artificial lighting - for how many hours a day are the lights on (tomatoes don't like 24 hour lighting).

Name: Sammy
Philadelphia, PA
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skhetan
Mar 18, 2018 9:34 PM CST
Thanks folks! Daisy, the plants are in a mini-greenhouse indoors and the humidity ranges from 55-75 throughout a 24-hour cycle... it doesn't really feel very humid in there though.

Sue, no spider mites and no nutrient deficiency. I'm using Jack's 20-20-20 fertilizer every couple weeks or so as well as earthworm castings (and the copper fungicide I mentioned)

I have full spectrum lighting that was on for 20 on 4 off, but I reduced to 17 on 7 off a few days ago...

I'm also getting a bit of blossom drop on the top blooms...

Sameer
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
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DaisyI
Mar 18, 2018 11:40 PM CST
Do you have air circulation? Like a fan? Do you see condensation on the plastic?

The leaves in photo 1 appear wet. In photo 4, I see either milldew or aphids, maybe both. As the blossom drop is at the top of the plant, it could be that those flowers are not getting pollinated.

Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
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sooby
Mar 19, 2018 6:23 AM CST
How are you supplying calcium?

I assume the brown areas were present before you used the copper, otherwise copper sprays can cause that:
http://universityofillinoispla...

24/7 lighting in tomato can cause chlorosis and leaf curling but I don't know whether 20 hours would do that or whether it would look exactly the same.
Name: greene
Savannah, GA (Sunset 28) (Zone 8b)
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greene
Mar 19, 2018 7:28 AM CST
skhetan, please, you skipped one question. What kind of soil/potting medium are you using? Is it a sterile bagged mix or something from your outside garden? Thanks. Thank You!

Are the earthworm castings something you purchased? or are you collecting them from outside? Thanks.
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"
Name: Sammy
Philadelphia, PA
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skhetan
Mar 19, 2018 7:56 AM CST
Thank you for the continued input all! Answers to your questions:

1) I don't see any visible aphids on leaves, HOWEVER there are some tiny insects crawling around in the soil... you can see one in the following youtube video, right-center of screen. It certainly looks like a spider mite? I don't see much root damage and they don't appear to be too numerous in the soil. Awhile back I did apply beneficial nematodes that eliminated a fungus gnat problem I was having. Would the nematodes eat these mites as well?

https://youtu.be/TFAQJ_xMMko

2) No condensation on inside plastic. Awhile back it was way too humid in there and I did notice more of that spotting which was wet and mildewy to the touch, but only a minor amount since. I am increasing ventilation in there.

3) Brown spots were indeed there before fungicide. As for calcium, I haven't been checking for that separately...

4) Earthworm castings are fresh from a friend who does vermiculture

5) The soil is all bagged commercial, none from outside. It's mostly Dr. Earth organic veggie potting soil from Home Depot.

HOWEVER after looking at those reviews online, it does appear many folks had problems with the soil being infested with fungus gnats (which I had) AND fusarium wilt (gah!!!)

Shrug! Shrug! Shrug!

If the culprit was the soil could I totally replace it all without the plants?? And is there any brand y'all would recommend?


Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
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DaisyI
Mar 19, 2018 11:35 AM CST
Fungus Gnats are a direct result of keeping plants too wet.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org

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