Square Foot Gardening Forum
[table bgcolor=#000000 height=275][tr][td]

Hello Guest!
Welcome to the official Square Foot Gardening Forum.
There's lots to learn here by reading as a guest. However, if you become a member (it's free, ad free and spam-free) you'll have access to our large vermiculite databases, our seed exchange spreadsheets, Mel's Mix calculator, and many more members' pictures in the Gallery. Enjoy.


[/td][/tr][/table]
Search
 
 

Display results as :
 

 


Rechercher Advanced Search

Latest topics
» N&C MW; Deep Winter December/January 2017-2018
by Scorpio Rising Yesterday at 7:57 pm

» Garden Clean-Up/Preparation
by Scorpio Rising Yesterday at 7:53 pm

» What are you eating from your garden today?
by trolleydriver Yesterday at 5:35 pm

» CANADIAN REGION: What are you doing in December 2017
by CapeCoddess Yesterday at 2:01 pm

» How's the Weather Where You're At?
by CapeCoddess Yesterday at 1:50 pm

» CarbSmart (tm) Potatoes
by sanderson Yesterday at 1:41 pm

» Sweet Potatoes
by countrynaturals Yesterday at 11:42 am

» California's Drought
by trolleydriver Yesterday at 10:38 am

» Third Year SFG in Canada
by Kelejan Yesterday at 7:51 am

» Happy Birthday!!
by Scorpio Rising 12/14/2017, 10:42 pm

» Areogardening
by brianj555 12/14/2017, 9:42 pm

» Spring Fever Anyone?
by Robbomb116 12/14/2017, 4:03 pm

» Air Fryer! HELP!
by countrynaturals 12/14/2017, 1:40 pm

» Butterfly Junction
by countrynaturals 12/14/2017, 11:01 am

» New England December 2017
by AtlantaMarie 12/14/2017, 6:32 am

» 1st Seed Catalog Arrived :)
by Scorpio Rising 12/13/2017, 7:43 pm

» jalapeno variety question?
by brianj555 12/13/2017, 6:03 pm

» Sauerkraut & fermenting veggies
by brianj555 12/13/2017, 5:28 pm

» Tomato Questions
by sanderson 12/13/2017, 3:04 pm

» Mid-South: December 2017
by AtlantaMarie 12/13/2017, 8:24 am

» What's Up? Yukon gold potatoes!
by sanderson 12/13/2017, 3:15 am

» New Composter - Need Help Filling Correctly
by saganco 12/12/2017, 9:10 pm

» December Avatar: 'Tis The Season!
by sanderson 12/12/2017, 2:29 pm

» The Research Journey:cardboard covering of newly planted seeds
by saganco 12/12/2017, 1:15 pm

» 2017 SFG in Brooks, Ga
by Turan 12/11/2017, 6:39 pm

» Winter Sowing vs. Winter Growing
by countrynaturals 12/11/2017, 11:44 am

» Mushroom in my lettuce!
by Scorpio Rising 12/10/2017, 10:40 pm

» 5-BOOK BUNDLE GIVEAWAY - ENDS 12/1/17
by No_Such_Reality 12/10/2017, 4:15 pm

» December: What to plant in Northern California and Central Valley areas
by countrynaturals 12/10/2017, 1:24 pm

» WARNING! Please Read! (Especially Grandparents)
by Scorpio Rising 12/9/2017, 8:53 pm

Google

Search SFG Forum

What are these yellow spots and how should I treat it?

View previous topic View next topic Go down

What are these yellow spots and how should I treat it?

Post  dstack on 1/11/2014, 6:52 pm



These spots are only on some of the older leaves. I'd like to get it under control before it spreads all over. Is this what they call downy mildew? And what do you suggest I do besides destroying the worst of the leaves?
avatar
dstack

Male Posts : 553
Join date : 2013-08-20
Age : 49
Location : South Florida (Ft. Lauderdale), Zone 10A

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  camprn on 1/11/2014, 8:22 pm

Please post a wider shot of the plant, there is so little to see here. To me this looks like maybe water spots from splash... and not much more.

If it's only on a few leaves and it's making you crazy or cautious, I suggest just prune the leaves off.

____________________________

41 years a gardener and going strong with SFG.
http://squarefoot.creatingforum.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

http://squarefoot.creatingforum.com/t1306-other-gardening-books



avatar
camprn

Forum Moderator Certified SFG Teacher

Female Posts : 14165
Join date : 2010-03-06
Age : 55
Location : Keene, NH, USA ~ Zone 5a

View user profile http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-week

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  yolos on 1/11/2014, 8:48 pm

Doesn't look like downy mildew to me.  Check out this website and also look at the underside of the leaves on your plants.  Also, what type of plant has the spots.

http://vegetablemdonline.ppath.cornell.edu/NewsArticles/Cuc_Downy_Mar06.html
avatar
yolos

Female Posts : 3307
Join date : 2011-11-20
Age : 67
Location : Brooks, Ga Zone 7B/8A

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  camprn on 1/11/2014, 9:06 pm

A wider shot of the plant really would help me wrap my brain around the issue. From what I can see in the photo posted, this link looks like it may have some reading value. I am not diagnosing the problem.

http://extension.umass.edu/vegetable/diseases/fulvia-leaf-mold-tomato

____________________________

41 years a gardener and going strong with SFG.
http://squarefoot.creatingforum.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

http://squarefoot.creatingforum.com/t1306-other-gardening-books



avatar
camprn

Forum Moderator Certified SFG Teacher

Female Posts : 14165
Join date : 2010-03-06
Age : 55
Location : Keene, NH, USA ~ Zone 5a

View user profile http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-week

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  dstack on 1/11/2014, 11:50 pm

I'll have to get that in the morning, but honestly, the rest of the tomato plants look quite healthy and normal.
avatar
dstack

Male Posts : 553
Join date : 2013-08-20
Age : 49
Location : South Florida (Ft. Lauderdale), Zone 10A

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  malefacter on 1/12/2014, 12:09 am

there yellow ish but i cant tell arethey fuzzy?
avatar
malefacter

Posts : 84
Join date : 2012-05-15
Location : Phx AZ

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  dstack on 1/12/2014, 12:18 am

No, it's just a dicoloring of the leaves in spots.
avatar
dstack

Male Posts : 553
Join date : 2013-08-20
Age : 49
Location : South Florida (Ft. Lauderdale), Zone 10A

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  dstack on 1/12/2014, 12:22 am

I'm a little surprised that I seem to have stumped everyone here. I see these spots every time I grow tomatoes. Last year it killed all the leaves and I thought the plants were gone for good, but a vigorous new growth gave the indeterminates a second chance.
avatar
dstack

Male Posts : 553
Join date : 2013-08-20
Age : 49
Location : South Florida (Ft. Lauderdale), Zone 10A

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  malefacter on 1/12/2014, 5:26 am

well there are several things that can caws yellowing so the more info you give the better you may have some kind of imballance in the soil for instance like to little N did you use the pre made mel mix or did you make your own ?
avatar
malefacter

Posts : 84
Join date : 2012-05-15
Location : Phx AZ

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  camprn on 1/12/2014, 7:33 am

@dstack wrote:I'll have to get that in the morning, but honestly, the rest of the tomato plants look quite healthy and normal.
Oh terrific! If the rest of the plant looks good, my suggestion is to remove the unsightly leaves and don't worry overly much okay . If you seem more of these or similar spots come out on your tomato plant foliage, checking in with the Extension Service Agriculture Agent would be the best thing to do for positive identification and any recommendations for necessary effective treatment. If the office is far away, email would probably work well for communicating with them.

Did you read the article to the link about fungus I posted? Are your garden conditions anyway similar to what was listed there?

____________________________

41 years a gardener and going strong with SFG.
http://squarefoot.creatingforum.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

http://squarefoot.creatingforum.com/t1306-other-gardening-books



avatar
camprn

Forum Moderator Certified SFG Teacher

Female Posts : 14165
Join date : 2010-03-06
Age : 55
Location : Keene, NH, USA ~ Zone 5a

View user profile http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-week

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  dstack on 1/12/2014, 8:28 am

@malefacter wrote:well there are several things that can caws yellowing so the more info you give the better you may have some kind of imballance in the soil for instance like to little N did you use the pre made mel mix or did you make your own ?
I made my own. But, like I said, I've seen this every time that I've grown tomatoes here in S. Florida. This is my first time doing it in a SFG. I know there's are deficiencies in my MM from other problems I'm having. I'm waiting on soil test results.
avatar
dstack

Male Posts : 553
Join date : 2013-08-20
Age : 49
Location : South Florida (Ft. Lauderdale), Zone 10A

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  dstack on 1/12/2014, 8:35 am

@camprn wrote:
@dstack wrote:I'll have to get that in the morning, but honestly, the rest of the tomato plants look quite healthy and normal.
 checking in with the Extension Service Agriculture Agent would be the best thing to do for positive identification and any recommendations for necessary effective treatment. If the office is far away, email would probably work well for communicating with them.
I emailed them before about this, but the master gardener that I know there is not very responsive to emails. I'll try again. 

I skimmed the articles, but I'll take another look. Thanks!
avatar
dstack

Male Posts : 553
Join date : 2013-08-20
Age : 49
Location : South Florida (Ft. Lauderdale), Zone 10A

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  camprn on 1/12/2014, 8:59 am

@dstack wrote:I'm a little surprised that I seem to have stumped everyone here. I see these spots every time I grow tomatoes. Last year it killed all the leaves and I thought the plants were gone for good, but a vigorous new growth gave the indeterminates a second chance.
We, all of us, are stumped at some time or another. I don't know that there is a horticultural professional that actually is a member here; a lot of us are relatively new gardeners but some members here have been gardening for decades and have seen and know quite a bit, but not everything. I think we are all still learning. Wink

If you have kept garden and weather records, have you looked back at the conditions in the garden when you had this trouble with your tomatoes last year? If so, are you having similar conditions now?

http://extension.ifas.ufl.edu/

http://edis.ifas.ufl.edu/pp121




____________________________

41 years a gardener and going strong with SFG.
http://squarefoot.creatingforum.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

http://squarefoot.creatingforum.com/t1306-other-gardening-books



avatar
camprn

Forum Moderator Certified SFG Teacher

Female Posts : 14165
Join date : 2010-03-06
Age : 55
Location : Keene, NH, USA ~ Zone 5a

View user profile http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-week

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  dstack on 1/12/2014, 10:52 am

My best record journal is contained in the properties of each photo I take. I'll have to check out the date that I took the photo last year. Also, the above  photo that I took of these spots was taken a few weeks ago. I noticed this morning that the spots are not quite so defined anymore. They are more like blurred smudges of yellow on the leaves. I'll get a fresh photo when I get home. 

Thanks for the clarification about the "stumped" thing. I'm only 45, and already planning to get my master gardener certification when I retire. Why wait? Their class hours don't coordinate with my full-time work schedule. And my garden is like a second (part-time) job.
avatar
dstack

Male Posts : 553
Join date : 2013-08-20
Age : 49
Location : South Florida (Ft. Lauderdale), Zone 10A

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  camprn on 1/12/2014, 10:59 am

If you have the date of the photos, you can check your area weather history with this site to determine the relative humidity, and such, for the historical dates you know. This could give you some useful info regarding known conditions for plant diseases in your area.
http://weatherspark.com/#!dashboard;a=USA/FL/Boca_Raton


I have a similar problem finding the time to take the Master Gardener classes in my state, but a lot of the information that MG receive in their classes is available online. For example:

http://edis.ifas.ufl.edu/

http://www.gardening.cornell.edu/education/mgprogram/mgmanual.htm

____________________________

41 years a gardener and going strong with SFG.
http://squarefoot.creatingforum.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

http://squarefoot.creatingforum.com/t1306-other-gardening-books



avatar
camprn

Forum Moderator Certified SFG Teacher

Female Posts : 14165
Join date : 2010-03-06
Age : 55
Location : Keene, NH, USA ~ Zone 5a

View user profile http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-week

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  dstack on 1/12/2014, 3:48 pm

Camprn, thanks for the info and links. 

Here's what the yellowing look like now. You can also see something nibbled at some of the leaves, but that's another issue that isn't as concerning. From what I read in one of your links it looks like the common tomato bacterial fungi that we get around here. I'm heading out now to prune those leaves off.   Wink 

avatar
dstack

Male Posts : 553
Join date : 2013-08-20
Age : 49
Location : South Florida (Ft. Lauderdale), Zone 10A

View user profile

Back to top Go down

Re: What are these yellow spots and how should I treat it?

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum