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What's causing this?

Mclovin

Mclovin

Hey guys

I have 2 unknown chilli seedling bought from the local nursery a few weeks ago, all was going good until the leaves started yellowing, edges browning and bottom leaves start wilting. Can this be simple sunburn(since they have been outside, in direct sunlight, since I got them) or something more serious and how can it be helped/rescued? Its only 2 weeks into spring and it hasn't been hotter than about +- 80 f outside during the day

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Flickr

Any clearance on this will be appreciated
 
ajijoe said:
did you spray fertilizer on them?if yes it could be fertilizer burnthanks your friend Joe
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Hey Joe

Nope, haven't used anything on them, just plain old tap water. The soil is just regular potting soil, maybe get them into some compost and get them little less sun during the day?
 
If that is Aluminum foil, I'd get rid of it. I've heard of Aluminum toxicity in peppers causing poor growth and other problems. If you are spraying them with the foil on them, it could be causing more issues.
 
RedtailForester said:
If that is Aluminum foil, I'd get rid of it. I've heard of Aluminum toxicity in peppers causing poor growth and other problems. If you are spraying them with the foil on them, it could be causing more issues.
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I thought, since they are inside(until they are ready to go outside again), id put foil around the base to keep some heat. The foil is just temporary(actually,I saw it on a video of The Chilli Guys on "utube")

But will remove it, didn't know it can be toxic.

Thanks for the tip
 
Can you get aluminum toxicity from having a piece of foil over the dirt?

I would think it's more of a reflecting light issue cooking the underside of the leaves.
 
i have to agree with Patrick, i just moved a plant in my hydroponic station as it was getting so large that it was growing into the light and its leaves started to curl like your plant.
 
Aluminum foil is safe and stable don't listen to the nay sayers! I use it for closed container grows and it works just fine, dont need to spend extra $$ on something fancy. If it was a burn the plant leaf would literally have to be touching the light bulb and since the top leaves look fine I wouldn't worry.

Most plants leach nutrients from the first set of leaves and they die off as the plant grows taller. Its totally natural and happens to all young plants. Don't worry your plants are fine, all you need to do is stop worrying and crack open a beer and watch them grow. :beer: :onfire:
 
If you are spraying water on the plants over the Aluminum foil, then it COULD be having an effect. I was merely pointing out a potential cause of your issues.

There must be a lot of nay sayers out there.

http://www.botany.pl/pubs-pdf/Acta%20Agrobotanica/2008/27_32.pdf
http://www.springerlink.com/content/h806101608144261/
http://www.springerlink.com/content/e5x4h38618484169/
http://www.actabp.pl/pdf/3_2001/673-686s.pdf
http://www.ejpau.media.pl/volume11/issue4/art-26.html

My God, you try to help a person out around here...
 
RedtailForester said:
If you are spraying water on the plants over the Aluminum foil, then it COULD be having an effect. I was merely pointing out a potential cause of your issues.

There must be a lot of nay sayers out there.

http://www.botany.pl/pubs-pdf/Acta%20Agrobotanica/2008/27_32.pdf
http://www.springerlink.com/content/h806101608144261/
http://www.springerlink.com/content/e5x4h38618484169/
http://www.actabp.pl/pdf/3_2001/673-686s.pdf
http://www.ejpau.media.pl/volume11/issue4/art-26.html

My God, you try to help a person out around here...
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I am sorry but you have proved yourself wrong. The chemical structure of aluminum foil is Al2O3 YES this makes a difference. In your articles they all reference the unstable Al3+ form which is devastating on the environment. It precipitates in fish gills. However Al2O3 is stable and found naturally in the soil.

*EDIT* Typo

*EDIT2* Just to further prove my argument, I quote...

Here

Aluminum foil mulches have been successfully used to reduce transmission of aphid-borne viruses in summer squashes, melons, and other susceptible vegetables. They repel invading aphid populations, reducing numbers on seedlings and small plants. Another benefit is that yields of vegetables grown on aluminum foil mulches are usually increased by the greater amount of solar energy reflecting on leaves.
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If that is the case then I stand corrected. As I stated before, what I had read about Aluminum is that it can be toxic. I'm not a chemical engineer and was basing my advice on what I had read in past articles.

On a side note, I did mention in my original post that I would be worried about the toxicity of Al if it were being watered / fertilized and therefore eventually releasing Al ions. The Al ions that are toxic to plant could be released into the soil / potting mix and therefore could be harmful to the seedlings. Part of the way the naturally occurring stable Al2O3 is made toxic in soil is by chemical decomposition / weathering, whether by acid rain or the addition of chemicals (e.g. fertilizers) that cause this same reaction.

Like I said, I'm no chemical engineer (like you are LonelyHab). I'm just using my knowledge of plant physiology, basic chemistry and personal experience.

It was a "from the hip" recommendation. Glad that is settled now...
 
why use foil when cardboard is available (assuming you have cardboard)...if you have to cover your soil at all...

back on subject...sunburn could be the issue, especially if the leaves had spots of water/other liquid on them in direct sunlight...a tale tale sign of sunburn is the color of the leaves....they look silverish to light copperish during the first stages...then you will notice a thinning of the leaf tissue until it is paper thin and the color usually goes to light tan/brown...if your plants were bigger, I would say take the damaged leaves off the plant...JMO
 
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