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blackening tomato leaves

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blackening tomato leaves

Post  GWN on 6/2/2014, 11:37 am

Hi. I have a new tomato problem I have never seen, One of my tomato plants is just turning black. 
I have many more, that all look healthy. This is in my SFG, in mels mix and it is well watered and even making some tomatoes, but the leaves have this blackish hue. Anyone recognize this




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Re: blackening tomato leaves

Post  donnainzone5 on 6/2/2014, 11:41 am

Several years ago, I bought a Bonnie tomato plant at Big Orange.  Before I could even get it in the ground, it turned black and died.

I don't know whether it's the same malady, of course, but where did you get your tomato plant?

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Re: blackening tomato leaves

Post  CapeCoddess on 6/2/2014, 12:13 pm

@GWN wrote:Hi. I have a new tomato problem I have never seen, One of my tomato plants is just turning black. 
I have many more, that all look healthy. This is in my SFG, in mels mix and it is well watered and even making some tomatoes, but the leaves have this blackish hue. Anyone recognize this



I recognize it because ALL of my tomato plants are like that.  I have no idea what's going on but I figured it was from stress and being cold.  I started them all from seed and we've had no rain to speak of.

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Re: blackening tomato leaves

Post  GWN on 6/2/2014, 12:18 pm

I grew all of my tomato plants from seed, and actually only 2/80 have this blackening leaves
We HAVE HAD tons of rain, but it is nice now.

I am thinking of pulling it out as I still have about 60 I COULD plant (I am attempting to grow tomatoes for the farmers market and one restaurant this year)

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Re: blackening tomato leaves

Post  AtlantaMarie on 6/2/2014, 1:08 pm

I've got the same thing here...  But the plants seem to be okay...

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Re: blackening tomato leaves

Post  camprn on 6/2/2014, 1:12 pm

What variety is this tomato plant? It looks like it may be part of the plants physiology, perhaps a mutation...? ok nevermind that...



I also see a bit of chlorosis in the photo. 

Mineral deficiency...

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Re: blackening tomato leaves

Post  GWN on 6/2/2014, 8:28 pm

The tomato is an alicante, and oddly enough the other one that has SOMEWHAT of the same thing is just 5 plants down and all the rest in between are fine.
The plant seems healthy though, in other respects
I found a site that listed all the things that happen with tomato leaves and there did not seem to be any of this.
I will watch closely. I thought someone might just say I KNOW WHAT IT IS  cheers

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Re: blackening tomato leaves

Post  Marc Iverson on 6/3/2014, 2:35 am

I'm having the same thing with two small plants my neighbor gave me. They looked worse than yours. Also showed some yellow in some of the leaves. Others of my tomatoes weren't black, but did show some yellow in the leaves.

As of the last couple of days, our night-time temps have come up out of the 40's. The two super-sick-looking tomatoes from my neighbor look vastly better, much less black and now just a dark green, and the yellow seems to have disappeared entirely. I was very surprised to see such a dramatic change. I have several times been ready to throw them away, and their pots and soil with them.

My other small tomatoes that were not black but still had yellowing now have less yellowing and look overall much better, too.

Re minerals, I know that temperature restricts availability to the plant of some nutrients. I wonder if that could be part of the problem, and, if so, whether my own higher temperatures these last couple of evenings went a good ways toward solving part of my tomato plants' problems. Cuz I thought those two plants especially were beyond hope. I had even felt keeping them might be a big mistake.

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Re: blackening tomato leaves

Post  GWN on 6/3/2014, 7:59 pm

You know that the interesting thing is that we have had temps pretty well above 45 at night for awhile now
Not sure if it could be temperatures
I did not notice that a few new leaves look more normal though

CC how are yours doing?

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Re: blackening tomato leaves

Post  CapeCoddess on 6/4/2014, 3:46 pm

Like Marc, I'm amazed at how good my toms are looking now that we're out of the 40's at nite.   What a Face  It must have been the cold.  

I'm glad you asked though because one has early blight already on some of the lower leaves.  My baby aspirin is here at work & I keep forgetting it so I just stuck it in my bag to take home.  I removed the leaves but will treat it anyway.  When I planted them I remembered to bury a tab in the hole before planting on only SOME of them.  This must be one I forgot.  Rolling Eyes 

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Re: blackening tomato leaves

Post  GWN on 6/4/2014, 4:37 pm

I have never had the blight, but many people out here do
So you treat it with baby asa?

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Re: blackening tomato leaves

Post  CapeCoddess on 6/5/2014, 1:09 pm

@GWN wrote:I have never had the blight, but many people out here do
So you treat it with baby asa?
Yes, I do.  Got the idea from the Answer Book.  Then I read about planting a tab with each tom plant.  We'll see how it goes.

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Re: blackening tomato leaves

Post  camprn on 6/6/2014, 6:54 am

It is best to prevent blight. Once the plant us infected, its all over and just a matter if time. Not only does the blight affect the stems and leaves but it also hits the fruit. It's a terribly destructive and heartbreaking thing.

The photos at the beginning of this thread look nothing like blight, early or late.

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Re: blackening tomato leaves

Post  cpl100 on 6/6/2014, 8:33 am

@CapeCoddess wrote:
@GWN wrote:I have never had the blight, but many people out here do
So you treat it with baby asa?
Yes, I do.  Got the idea from the Answer Book.  Then I read about planting a tab with each tom plant.  We'll see how it goes.

CC
You plant a baby aspirin with each plant?  I did not know to do that.  Can I shove one down the soil near the stem now?  How does this work or why does this work?  Thanks.  Always wanting to learn new things!

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Re: blackening tomato leaves

Post  camprn on 6/6/2014, 8:56 am

@cpl100 wrote:
@CapeCoddess wrote:
@GWN wrote:I have never had the blight, but many people out here do
So you treat it with baby asa?
Yes, I do.  Got the idea from the Answer Book.  Then I read about planting a tab with each tom plant.  We'll see how it goes.

CC
You plant a baby aspirin with each plant?  I did not know to do that.  Can I shove one down the soil near the stem now?  How does this work or why does this work?  Thanks.  Always wanting to learn new things!
Yes please, I would like a link to a reliable source for this information. Thanks.

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Re: blackening tomato leaves

Post  Judy McConnell on 6/6/2014, 9:28 am

Cornell's research with asprin affecting tomato (and other plants) immunity through particular gene action:



http://www.news.cornell.edu/stories/2003/12/plant-gene-offers-disease-control-without-pesticides


Popular English Press article but does list two "scientific studies"



Sounds to me that an asprin couldn't hurt and might help.  My questions would center around what strength (concentration) to use and would the asprin help before disease appears in older plants?
http://www.dailymail.co.uk/news/article-2625661/Problems-growing-tomatoes-Feed-ASPIRIN-say-scientists-fight-disease-boost-yield.html

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Re: blackening tomato leaves

Post  cpl100 on 6/6/2014, 9:30 am

@camprn wrote:
@cpl100 wrote:
@CapeCoddess wrote:
@GWN wrote:I have never had the blight, but many people out here do
So you treat it with baby asa?
Yes, I do.  Got the idea from the Answer Book.  Then I read about planting a tab with each tom plant.  We'll see how it goes.

CC
You plant a baby aspirin with each plant?  I did not know to do that.  Can I shove one down the soil near the stem now?  How does this work or why does this work?  Thanks.  Always wanting to learn new things!
Yes please, I would like a link to a reliable source for this information. Thanks.
This popped up first when I just tried Google:  SFG thread on Baby Asprin

And this also came from the search:  Discussion on GardenWeb

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Re: blackening tomato leaves

Post  66stitches on 6/7/2014, 2:23 pm

Hi GWN, 
Please do share if you find out what it is. I only have two tomato plants in my first 4x8 sfg and I bought them from a local nursery. They were both nice and green when I planted them, and both now have this black colouring on the leaves. 

It might have been too cold when I planted them, and I perhaps didn't harden them off properly (wasn't sure if the ones from the nursery needed it, newbie!). I wondered too, if they were mad at me for transplanting them, or if perhaps I did not take enough care in doing that. I also looked all over this site and the web for an answer without much luck.

My pepper plants were showing some blackening similar on their stems and leaves too. I now understand maybe some darkening on the stems off peppers is normal? But I couldn't understand the leaves. Best I could come up with from my research was that maybe they were developing a suntan to help them cope with bright sun - is that crazy? I don't know, but I read that somewhere.

Being a newbie, and since the plants look pretty good otherwise (well, they have a couple issues but I think I was overwatering and that seems to be corrected now) I've decided to accept them as they are and hope for the best. But if you find an answer I would love to know!

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Re: blackening tomato leaves

Post  GWN on 6/7/2014, 2:58 pm

I have been growing tomatoes for about 30 years, and have never seen anything like this
The interesting thing is that the leaves that were scrunched together,... the centre part is nice and green
Almost like it was sprayed with black paint and some areas did not get hit.
I have applied a huge lump of compost and wood chips and fish fertilizer??

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Re: blackening tomato leaves

Post  camprn on 6/8/2014, 8:37 am

66, pepper plants all have some darker, almost black areas stem and leaf notches. No problem with those.

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