What is this?

Hellmanns · February 13, 2016

A market gardening friend called me to diagnosis this. I don't have a clue.

About 5% of his plants have this clorosis, they either have it or they don't, anyone with any idea's as to the cause?

KarenO · February 13, 2016

Looks like iron deficiency. I can't explain why only some of his plants are affected unless he used different soil mix for a few.
A dose of fertilizer with iron in it will help.
KarenO
\

KarenO · February 13, 2016

may not be strictly a deficiency of iron but rather an uptake issue caused by too wet, high soil ph, excessive phosphous etc. google iron chlorosis

KarenO

Hellmanns · February 13, 2016

Quote:

Originally Posted by KarenO

may not be strictly a deficiency of iron but rather an uptake issue caused by too wet, high soil ph, excessive phosphous etc. google iron chlorosis

KarenO

Thanks, Karen.
Same soil used on all, but only affects a few plants. My friend says it happens every year for the past 8 or so years. He says the affected leaves always die, but the plant recovers after being transplanted.

Dutch · February 13, 2016

Hi Hellmanns,
Looking at the lower right hand corner, it appears to be sunburn. If that is the case, it will grow out of it.
Dutch

Hellmanns · February 13, 2016

Quote:

Originally Posted by Dutch

Hi Hellmanns,
Looking at the lower right hand corner, it appears to be sunburn. If that is the case, it will grow out of it.
Dutch

Thanks, Dutch. It definitely ain't sunburn. They are growing under florescent lights in a grow box.

b54red · February 14, 2016

Use an iron supplement and put it diluted in a spray bottle and apply to the leaves several times a day for a few days. This will usually correct the problem if done soon enough. I usually have some plants affected by this every year and transplanting doesn't always solve the problem. My soil has a fairly high ph so I keep a close eye for chlorisis every year and every time I see signs of it I spray the leaves with an iron supplement. Once the leaves go from pale green to yellow it is harder to correct and once they turn white it is usually too late for those leaves but if the iron supplement is added the new leaves that come out are frequently normal.

Bill

Hellmanns · February 14, 2016

Quote:

Originally Posted by b54red

Use an iron supplement and put it diluted in a spray bottle and apply to the leaves several times a day for a few days. This will usually correct the problem if done soon enough. I usually have some plants affected by this every year and transplanting doesn't always solve the problem. My soil has a fairly high ph so I keep a close eye for chlorisis every year and every time I see signs of it I spray the leaves with an iron supplement. Once the leaves go from pale green to yellow it is harder to correct and once they turn white it is usually too late for those leaves but if the iron supplement is added the new leaves that come out are frequently normal.

Bill

Thanks, Bill! I'll pass all of the responses along.

PureHarvest · February 17, 2016

Zooming in on the photo, and looking at the plant on the right, you can see some mottling on the leaves. That one looks magnesium deficient.
I think the one on the left is a different pattern than on the right.
Overall, something is not getting into the plant, OR too much of something.
I would be curious to know about the TDS (total dissolved solids) and pH of his source water. To be more specific, what are the exact minerals/elements in his source water that make up his TDS?
I ask this, because it has been going on for many years, and I'm assuming his has made adjustments to soil and fert, and still getting the problem. That would lead me to think about the water he has.

Hellmanns · February 22, 2016

Quote:

Originally Posted by Hellmanns

A market gardening friend called me to diagnosis this. I don't have a clue.

About 5% of his plants have this clorosis, they either have it or they don't, anyone with any idea's as to the cause?

A "fleshy", wet, leaf curling, swelling has now developed on affected plants. The growth feels just like a soft wet mushroom.. Systemic bacterial infection??

PureHarvest · February 22, 2016

Are they grown in a heated greenhouse? Is it vented inside? Maybe air quality damage if so?
Any updated pics?

Hellmanns · February 22, 2016

Quote:

Originally Posted by PureHarvest

Are they grown in a heated greenhouse? Is it vented inside? Maybe air quality damage if so?
Any updated pics?

I try to get some pics later today.

Hellmanns · February 22, 2016

Here's a new picture. My friend has sent a plant to be diagnosed too.

Worth1 · February 24, 2016

2 days and nothing where are the plague doctors??

Worth

OzoneNY · February 25, 2016

I had something similar. It was suggested I overfed the plants and so I rinse off the roots and repot them with clean potting soil. In 2 days time, the plants all recovered.

February 13, 2016	#1
Hellmanns Tomatovillian™ Join Date: Jul 2014 Location: kentucky Posts: 1,116	What is this? A market gardening friend called me to diagnosis this. I don't have a clue. About 5% of his plants have this clorosis, they either have it or they don't, anyone with any idea's as to the cause?

February 13, 2016	#5
Dutch Tomatovillian™ Join Date: Jan 2011 Location: S.E. Wisconsin Zone 5b Posts: 1,831	Hi Hellmanns, Looking at the lower right hand corner, it appears to be sunburn. If that is the case, it will grow out of it. Dutch __________________ "Discretion is the better part of valor" Charles Churchill The intuitive mind is a gift, and the rational mind is a faithful servant. But we have created a society that honors the servant and has forgotten the gift. (paraphrased) Albert Einstein I come from a long line of sod busters, spanning back several centuries.

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February 13, 2016	#2
KarenO Tomatovillian™ Join Date: Oct 2012 Location: Vancouver Island Posts: 5,932	Looks like iron deficiency. I can't explain why only some of his plants are affected unless he used different soil mix for a few. A dose of fertilizer with iron in it will help. KarenO \

February 14, 2016	#7
b54red Tomatovillian™ Join Date: Sep 2009 Location: Alabama Posts: 7,068	Use an iron supplement and put it diluted in a spray bottle and apply to the leaves several times a day for a few days. This will usually correct the problem if done soon enough. I usually have some plants affected by this every year and transplanting doesn't always solve the problem. My soil has a fairly high ph so I keep a close eye for chlorisis every year and every time I see signs of it I spray the leaves with an iron supplement. Once the leaves go from pale green to yellow it is harder to correct and once they turn white it is usually too late for those leaves but if the iron supplement is added the new leaves that come out are frequently normal. Bill

February 17, 2016	#9
PureHarvest Tomatovillian™ Join Date: Mar 2014 Location: Mid-Atlantic right on the line of Zone 7a and 7b Posts: 1,369	Zooming in on the photo, and looking at the plant on the right, you can see some mottling on the leaves. That one looks magnesium deficient. I think the one on the left is a different pattern than on the right. Overall, something is not getting into the plant, OR too much of something. I would be curious to know about the TDS (total dissolved solids) and pH of his source water. To be more specific, what are the exact minerals/elements in his source water that make up his TDS? I ask this, because it has been going on for many years, and I'm assuming his has made adjustments to soil and fert, and still getting the problem. That would lead me to think about the water he has.

February 22, 2016	#11
PureHarvest Tomatovillian™ Join Date: Mar 2014 Location: Mid-Atlantic right on the line of Zone 7a and 7b Posts: 1,369	Are they grown in a heated greenhouse? Is it vented inside? Maybe air quality damage if so? Any updated pics?

February 24, 2016	#14
Worth1 Tomatovillian™ Join Date: Feb 2006 Location: Den of Drunken Fools Posts: 38,539	2 days and nothing where are the plague doctors?? Worth

February 25, 2016	#15
OzoneNY Tomatovillian™ Join Date: Jul 2014 Location: Frisco Texas Posts: 390	I had something similar. It was suggested I overfed the plants and so I rinse off the roots and repot them with clean potting soil. In 2 days time, the plants all recovered.