Tomato sunburn? Yellow Squash leaves?

luigiwu · May 23, 2014

I don't know if this yellow-ish tomato leaf is just a bit sunburned or something else?

Also the squash, are they in need of something??
And there is a strange thing happening with some of the leaves - along with they yellowing, dying - it highlights these gray-green speckle. Are each of those tiny specks a bug? Soapy water spray of fungicide?

jmsieglaff · May 23, 2014

I think the tomato looks like sunburn. I wonder if the squash is too wet and possibly too cool? I can't see the speckles you refer to.

b54red · May 23, 2014

The squash looks like it needs nitrogen badly. Squash are heavy feeders and need adequate fertilizer to do well so if you have any of the blue stuff give it a feeding. Inadequate light can also cause a squash plant to yellow. There is one other possibility but I have only seen it a few times on squash and that is spider mites.

Bill

KarenO · May 23, 2014

they both look like they need some fertilizer, the squash especially. Agree with a good dose of soluble once they dry out a little as they look pretty wet. you have good drainage holes in those containers?
Karen

luigiwu · May 23, 2014

Thanks for chiming in guys!

These are sub-irrigated containers - the mix is peat and mushroom compost - they do have good drainage but its been a little rainy here, and will continue to be so for the next day. I guess I should wait to administer the blue stuff?

The gray specks can be seen better in this picture.

KarenO · May 23, 2014

that is mold
KO

luigiwu · May 23, 2014

Karen,
really? And it feels powdery to the touch? What does that mean that its mold? Weather here is about 70-mid 50s (at night.) Its not *that* humid, yet...

KarenO · May 23, 2014

Google grey mould aka botrytis. A Dry powdery mould very common and also very easily spread. Peat moss and spent mushroom compost both quite acidic and neither contain essentially any nutrient value for plants so regular fertilizer would be needed if using those things as a potting mix on their own.
Ko

JamesL · May 23, 2014

Luigiwu,
I would agree with Karen. Can't say for certain what type of mold (or possibly mildew) but if it is powdery that's a really safe bet. Our weather is perfect for it right now. Get to spraying....
I believe I will do an inspection on mine and a preemptive spray tomorrow as well....

PS - You should really be doing a weekly spray routine anyway.

clkeiper · May 24, 2014

How big was your squash when you planted it? It looks like the ones sitting in my greenhouse that are seriously pot bound that I didn't have room for in the garden. Squash does much better when they are much smaller to transplant. I try to keep it to one true leaf when transplanting into the garden. Give it some fertilizer high in nitrogen.

luigiwu · May 24, 2014

KarenO, you are a wealth of info - you've always identified all the issues for this newbie gardener!

James, tell me more about this weekly spray!!! Are you talking about soapy water or??

Carolyn, I did start them too early for sure. Those leaves are also looking quite yellow. Some aren't even transplanted yet since we've been getting so much rain. I'm wondering if I should not bother with them and start over from seed for those guys.

clkeiper · May 24, 2014

Honestly, I would start fresh seeds and grow them again. I think you will have better results for the season. Those mught just struggle to the point of not thriving, just surviving.

JamesL · May 25, 2014

Luigiwu,
Weekly spray - Ounce of prevention vs the pound of cure.

I try to spray something as a preventative once a week, I am certainly not the only one. Rain being a factor as to timing.
I am partial to, and I tend to rotate them:
1. Actinovate, sometimes mixed with Exel LG (systemic fungicide) (many here on T'ville use them) sometimes not depending if I am spraying more than tomatoes,
2. Serenade, and
3. Milk spray.

Milk Spray
Milk at 2 cups of 1% to the gallon. Which would put it at a 1 to 8 ratio
Neptunes Harvest or similar– 2 tbs per gallon
Molasses 1 tsp

The rules change when you need to eradicate.
Did you treat for your mold / mildew issue yet?
Greencure (Potassium bicarbonate) is fairly effective vs mildew and some mold, but not really vs grey mold.
You might have success with a copper product.

Bill’s Bleach Spray would do it..
http://tomatoville.com/showthread.php?t=28509

May 23, 2014	#1
luigiwu Tomatovillian™ Join Date: Jun 2013 Location: ny Posts: 1,219	Tomato sunburn? Yellow Squash leaves? I don't know if this yellow-ish tomato leaf is just a bit sunburned or something else? Also the squash, are they in need of something?? And there is a strange thing happening with some of the leaves - along with they yellowing, dying - it highlights these gray-green speckle. Are each of those tiny specks a bug? Soapy water spray of fungicide?

May 23, 2014	#7
luigiwu Tomatovillian™ Join Date: Jun 2013 Location: ny Posts: 1,219	Karen, really? And it feels powdery to the touch? What does that mean that its mold? Weather here is about 70-mid 50s (at night.) Its not that humid, yet... Last edited by luigiwu; May 23, 2014 at 07:10 PM.

May 24, 2014	#10
clkeiper Tomatovillian™ Join Date: Nov 2011 Location: ohio Posts: 4,350	How big was your squash when you planted it? It looks like the ones sitting in my greenhouse that are seriously pot bound that I didn't have room for in the garden. Squash does much better when they are much smaller to transplant. I try to keep it to one true leaf when transplanting into the garden. Give it some fertilizer high in nitrogen. __________________ carolyn k

May 24, 2014	#11
luigiwu Tomatovillian™ Join Date: Jun 2013 Location: ny Posts: 1,219	KarenO, you are a wealth of info - you've always identified all the issues for this newbie gardener! James, tell me more about this weekly spray!!! Are you talking about soapy water or?? Carolyn, I did start them too early for sure. Those leaves are also looking quite yellow. Some aren't even transplanted yet since we've been getting so much rain. I'm wondering if I should not bother with them and start over from seed for those guys. Last edited by luigiwu; May 24, 2014 at 07:29 PM.

May 24, 2014	#12
clkeiper Tomatovillian™ Join Date: Nov 2011 Location: ohio Posts: 4,350	Honestly, I would start fresh seeds and grow them again. I think you will have better results for the season. Those mught just struggle to the point of not thriving, just surviving. __________________ carolyn k

May 23, 2014	#2
jmsieglaff Tomatovillian™ Join Date: Jan 2014 Location: Southern WI Posts: 2,742	I think the tomato looks like sunburn. I wonder if the squash is too wet and possibly too cool? I can't see the speckles you refer to.

May 23, 2014	#3
b54red Tomatovillian™ Join Date: Sep 2009 Location: Alabama Posts: 7,068	The squash looks like it needs nitrogen badly. Squash are heavy feeders and need adequate fertilizer to do well so if you have any of the blue stuff give it a feeding. Inadequate light can also cause a squash plant to yellow. There is one other possibility but I have only seen it a few times on squash and that is spider mites. Bill

May 23, 2014	#4
KarenO Tomatovillian™ Join Date: Oct 2012 Location: Vancouver Island Posts: 5,932	they both look like they need some fertilizer, the squash especially. Agree with a good dose of soluble once they dry out a little as they look pretty wet. you have good drainage holes in those containers? Karen

May 23, 2014	#9
JamesL Tomatovillian™ Join Date: Nov 2011 Location: Long Island NY Posts: 1,992	Luigiwu, I would agree with Karen. Can't say for certain what type of mold (or possibly mildew) but if it is powdery that's a really safe bet. Our weather is perfect for it right now. Get to spraying.... I believe I will do an inspection on mine and a preemptive spray tomorrow as well.... PS - You should really be doing a weekly spray routine anyway.

May 25, 2014	#13
JamesL Tomatovillian™ Join Date: Nov 2011 Location: Long Island NY Posts: 1,992	Luigiwu, Weekly spray - Ounce of prevention vs the pound of cure. I try to spray something as a preventative once a week, I am certainly not the only one. Rain being a factor as to timing. I am partial to, and I tend to rotate them: 1. Actinovate, sometimes mixed with Exel LG (systemic fungicide) (many here on T'ville use them) sometimes not depending if I am spraying more than tomatoes, 2. Serenade, and 3. Milk spray. Milk Spray Milk at 2 cups of 1% to the gallon. Which would put it at a 1 to 8 ratio Neptunes Harvest or similar– 2 tbs per gallon Molasses 1 tsp The rules change when you need to eradicate. Did you treat for your mold / mildew issue yet? Greencure (Potassium bicarbonate) is fairly effective vs mildew and some mold, but not really vs grey mold. You might have success with a copper product. Bill’s Bleach Spray would do it.. http://tomatoville.com/showthread.php?t=28509