Shiny golden spots on leaves

[TURBOKILLER]

Hi.
I've noticed one of my plants has these shiny spots on a pair of leaves. I had the same problem with a seedling this season but have no idea what causes it. In addition to the spots, the seedling's leaves were also yellowish.
Initially the spots are shiny and somewhat golden (the color is not evident in the photos), eventually they turn brown and the leaf itself yellows and dies. Any ideas on what might be causing it?

 

[TURBOKILLER]

From what I've seen online, this seems to be a Mn deficiency and/or over-watering. Can anybody confirm that?

 

[TURBOKILLER]

UPDATE: here's the progression, today's pics

 

[Aroxol]

If you’re growing in coco and pH is between 5.8-6.2, I’d say add some additional calmag and see if that resolves it on new growth. Damaged leaves won’t heal, but more CM should prevent additional signs.

If that’s soil, not my area expertise but maybe someone else will chime in.

To me it just looks like simple calmag deficiency which isn’t a big deal, so I’d recommend starting there before going super deep into analysis or panic.

 

[Emilya Green]

Hi @TURBOKILLER ... sorry you didn't get lot of response on this. It does look like a magnesium deficiency to me, and as mentioned above, calmag+ is a very common fix for this problem. We can't see much from your pictures though and there could be causes for why this is happening that can be addressed if you tell us what sort of grow medium you are in and whether or not you adjust the pH of the fluids going in.

 

[TURBOKILLER]

add some additional calmag

It does look like a magnesium deficiency to me

Thx. I'm growing in soil. Water PH is 6.2-6.4. Gave them a nice watering with added NPK amendment that also contains micro nutrients. Still waiting for calmag delivery.
The good news is it seems to have stopped spreading for now. New growth is very vigorous.
Should I remove affected leaves or just let them dry out and fall off on their own?

 

[Barney86]

Thx. I'm growing in soil. Water PH is 6.2-6.4. Gave them a nice watering with added NPK amendment that also contains micro nutrients. Still waiting for calmag delivery.
The good news is it seems to have stopped spreading for now. New growth is very vigorous.
Should I remove affected leaves or just let them dry out and fall off on their own?

Yeah looks like she needs a dose of calmag to me too mate. Just leave them on, they won't die.

 

[Barney86]

Hmm just looked again, If you've got a magnifying glass handy I'd have a check to make sure it's not tiny wee beasties. There's something or other that I can't remember does look a bit like that. If nothing moving on them though then youre sweet.

 

[Emilya Green]

Should I remove affected leaves or just let them dry out and fall off on their own?

The only one the damaged leaves are bothering is you. Leave them on there and since this is where the plant is going to for the needed magnesium to supply the new growth, you now have the ability watch to see if you have indeed halted the progression of this problem once you apply the calmag. The damaged parts will never repair, but the rest of that leaf can remain healthy until the very end. If you remove this leaf and don't correct the problem, the plant will simply start taking what it needs from the next leaf in line. Removing the leaf will actually cause more damage to the plant than would have occurred if you had left it.

 

[TURBOKILLER]

Leave them on there

Copy that.
Next watering/feeding is scheduled for the weekend. Will post an update in a week or so after applying calmag to see how they react.

Once again, thx a lot for everybody's input. Much appreciated.

PS: is it safe to apply calmag as foliar spray as an extra measure? Sorry for all the noob questions.

 

[Emilya Green]

is it safe to apply calmag as foliar spray as an extra measure?

yes

 

[bl2001]

Hi. I know this post is a couple years old. @TURBOKILLER did ever fix this problem? I'm having the exact same spots on my lower leaves and I'm going around in circles not knowing what to do. Your post is the only one I found that is exactly what's happening to my plant. Hope you see this and reply

 

[013]

flew the coupe - last logon for turbo killer was 2019

 

[Roy Growin]

Hi @013 - btw, it's spider mites, nowt to do with nutes

 

[CaptainLucky]

Hi @013 - btw, it's spider mites, nowt to do with nutes

I was gonna say thrips but didn’t know if they were white spots first.?

 

[Roy Growin]

I was gonna say thrips but didn’t know if they were white spots first.?

All bugs eat sap, so tiny spots is a giveaway
If the discoloration is blotchy or through multiple leaves and rising, that's nutes

 

[CaptainLucky]

All bugs eat sap, so tiny spots is a giveaway
If the discoloration is blotchy or through multiple leaves and rising, that's nutes

Thanks for the info Roy, I will file in my memory bank’s if they’re not too damaged.lol