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#5973957 - 08/12/17 08:03 PM Black spot disease on tomatoes leafs
RdFx Offline
trapper

Registered: 12/23/06
Posts: 3817
Loc: Wisconsin
Never had this before, think possibly its from hot muggy weather. Maters are up in cages so plenty of air flow. Any one have this problem and thier fix. Im using a Spectracide called Immunox right now.

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#5973961 - 08/12/17 08:08 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
Tactical.20 Offline
trapper

Registered: 12/24/06
Posts: 10014
Loc: N.W. Iowa
Could be septoria leaf spot, I get it every year

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#5973968 - 08/12/17 08:13 PM Re: Black spot disease on tomatoes leafs [Re: Tactical.20]
huntrap247 Offline
trapper

Registered: 02/16/13
Posts: 1108
Loc: Northern Illinois
Originally Posted By: Tactical.20
Could be septoria leaf spot, I get it every year


X2

Got it extra early due to lots of wet weather, treated with a fungicide to slow it down.
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#5973974 - 08/12/17 08:19 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
trapper les Offline
trapper

Registered: 03/06/11
Posts: 12901
Loc: williams,mn
Septoria leaf spot will start at the bottom, and you can see it in the green leaves as little tiny light colored spots, and the leaves turn yellow , the spots turn brown and by that time have blown spores up into the next layer of leaves. Those yellowed leaves and branches can pop right off after having died and spread the fungus. It needs to be arrested with a fungicide, maybe every 10 days or so as if the conditions are right ( heavy dew, moisture that lingers) , every plant will eventually get it.
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#5973980 - 08/12/17 08:25 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
pudge Offline
trapper

Registered: 08/27/07
Posts: 30
Loc: va
As soon as I set tomatoes out I start a regular spray cycle. Copper and mancozeb, alternate every 7-10 days depending on weather. Use a spreader sticker also. Some years it is a battle that cannot be won, other years I have tomatoes until frost.

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#5973984 - 08/12/17 08:28 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
RdFx Offline
trapper

Registered: 12/23/06
Posts: 3817
Loc: Wisconsin
The black spots are size of pepper granules on leaves, no yellowing or brown spots, only small black spots.

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#5974046 - 08/12/17 09:32 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
Tactical.20 Offline
trapper

Registered: 12/24/06
Posts: 10014
Loc: N.W. Iowa
Google tomato diseases

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#5974050 - 08/12/17 09:36 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
bhugo Offline
trapper

Registered: 05/08/07
Posts: 1079
Loc: Flint, Michigan
Any bugs under the leaves? Insecticidal soap and copper fungicide will help tomatoes.
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#5974052 - 08/12/17 09:40 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
Ridge Runner1960 Offline
trapper

Registered: 12/20/08
Posts: 2679
Loc: eastern WV
mine started as black specks I attributed to spider mites not knowing any difference, then they started turning yellow and dieing from the bottom up, sprayed every few days with captan and they straightened up, now have plants 6' tall
RR

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#5974055 - 08/12/17 09:41 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
Ridge Runner1960 Offline
trapper

Registered: 12/20/08
Posts: 2679
Loc: eastern WV
Do not use dust while they are in bloom, dust will burn the bloom
RR

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#5974058 - 08/12/17 09:42 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
trapper les Offline
trapper

Registered: 03/06/11
Posts: 12901
Loc: williams,mn
Rdfox, looks like you have time, as it's in it's early stages. They don't start out black either, that develops . I would give it a fungicide treatment, even before a positive diagnosis of what pathogen it is , just to be on the safe side.
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#5974248 - 08/13/17 07:34 AM Re: Black spot disease on tomatoes leafs [Re: RdFx]
RdFx Offline
trapper

Registered: 12/23/06
Posts: 3817
Loc: Wisconsin
Done sprayed maters, will watch closely. Thanks for the info posted.

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#5974322 - 08/13/17 09:12 AM Re: Black spot disease on tomatoes leafs [Re: RdFx]
Tradbow1 Offline
trapper

Registered: 12/15/11
Posts: 1088
Loc: AK
Les, any recommendations? I struggle with this as well

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#5974387 - 08/13/17 10:52 AM Re: Black spot disease on tomatoes leafs [Re: Tradbow1]
swift4me Offline
trapper

Registered: 07/13/10
Posts: 1375
Loc: American In the Pyrenees; Fran...
We deal with mildew here constantly due to humidity. Regular spraying of copper sulfate takes care of things. Mine at the farm got hit hard and I removed damaged leaves and sprayed. I think I saved them.

Not sure that is your case, but black spots around here followed by yellowing leaves and black areas on stems means mildew.

Good luck,

Pete

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#5974421 - 08/13/17 11:41 AM Re: Black spot disease on tomatoes leafs [Re: RdFx]
RdFx Offline
trapper

Registered: 12/23/06
Posts: 3817
Loc: Wisconsin
Plenty of air moving thru maters up on cages off ground so no mildew....

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#5974449 - 08/13/17 12:49 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
upstateNY Offline
trapper

Registered: 08/01/08
Posts: 6754
Loc: ny
Spray with Fung-Onil,all purpose fungicide.


Edited by upstateNY (08/13/17 12:50 PM)
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#5974468 - 08/13/17 01:10 PM Re: Black spot disease on tomatoes leafs [Re: upstateNY]
swift4me Offline
trapper

Registered: 07/13/10
Posts: 1375
Loc: American In the Pyrenees; Fran...
Not disagreeing but my tomatoes are well trained high up on stakes and they get plenty of air and they still got mildew.

I know there are lots of tomato diseases and I hope you find out what you have. Copper sulfate never hurt a tomato though.

Pete

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#5974715 - 08/13/17 06:01 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
Tradbow1 Offline
trapper

Registered: 12/15/11
Posts: 1088
Loc: AK
Pete shoot me an email if you would.

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#5974720 - 08/13/17 06:08 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
Scout1 Offline
trapper

Registered: 07/28/12
Posts: 1186
Loc: Western N. Carolina
You might try a fungicide called Bravo. Before picking use fungicide Manzate for early blight. Then after you start picking use Bravo for late blight, with manzate. Add some good insecticide in as well. Last few years I have also had trouble with spider mites. You'll notice yellow streaks in the leaves and when they get bad enough you find the tiny webs under the leaves. It takes a good miticide to get rid of them. My maters are having trouble ripening this year but are finally starting to turn good.
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#5974735 - 08/13/17 06:19 PM Re: Black spot disease on tomatoes leafs [Re: RdFx]
Tradbow1 Offline
trapper

Registered: 12/15/11
Posts: 1088
Loc: AK
Stress! Prune excess foliage. Theyll ripen! Take excess flowers when you think you're out of time to finish them off before its over. Force nutrients into the fruit. Continue watering-fertilizing. Eventually prune all foliage. Works like a champ.

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