Is this the dreaded leaf spot disease?

JJ05 · Sep 7, 2011

Heres some pics of my yellowing fan leaves. ONLY the yellowing ones have this, green ones are 100% fine. Is this leaf spot disease or are my plants just sucking the nutes from the fan leaves?

dredredre · Sep 7, 2011

Looks it to me. Liquid copper & immunox seem to be the recommended solutions.

TwistedGenetics · Sep 7, 2011

I would say, no... Unless it is a very early case.

JJ05 · Sep 7, 2011

dredredre said:
Looks it to me. Liquid copper & immunox seem to be the recommended solutions.

But its not spreading quick. It seems the plant is casually killing the fan leaves. I have two other plants whom are about 2 weeks behind in flowering than the pics above and even they are killing off fan leaves....advice please!!!!!!

*BUDS · Sep 7, 2011

No, the plant is healthy, dont go messing around now.

JJ05 · Sep 7, 2011

TwistedGenetics said:
I would say, no... Unless it is a very early case.
View attachment 1775128

Oh yeah....see my green leaves dont have ANY brown spots ONLY the yellowing ones get brown spots on them....the green ones around them are spotless.

dredredre · Sep 7, 2011

You look like you're about a month away from harvest. It doesn't look bad, whatever it is. If it doesn't start spreading like crazy I wouldn't worry about it.

Chronic Indica · Sep 7, 2011

yellowing of the fan leaves is normal in flowering but the burn must be some type of deficiency. To me it looks like your plant isnt getting enough manganese. manganese is best absorbed at 5.5-6.5 but isnt locked out of the soil till 5.0 ph. although this may not be the problem the best way to find out is to test your soil ph. What week of flowering is your plant at right now?

TwistedGenetics · Sep 7, 2011

I think if it was leaf spot it wouldn't be restricted to the fan leaves like it appears to be. If this is not normal yellowing for flowering time (seems not) I would say it is Magnesium deficiency, N deficiency, or low pH.

TwistedGenetics · Sep 7, 2011

JJ05 said:
Oh yeah....see my green leaves dont have ANY brown spots ONLY the yellowing ones get brown spots on them....the green ones around them are spotless.

Exactly.

I would feed Epsom salts and see if it stops progressing. I bet you it does.

Chronic Indica · Sep 7, 2011

Having plants that are deficient in manganese can turn the young leaves into spotted (mottled) yellow and or brown areas on young leaves. Dead (Necrotic) yellow spots form on top leaves, while the lower older leaves will or may have gray specks and or spots. Symptoms can include yellowing of leaves while the leaf veins can stay green. Can also produce a chequered effect. As the plant gets newer growths the plant will seem to grow away from the problem, that’s why the younger leaves may be unaffected.

JJ05 · Sep 7, 2011

Chronic Indica said:
View attachment 1775153

Having plants that are deficient in manganese can turn the young leaves into spotted (mottled) yellow and or brown areas on young leaves. Dead (Necrotic) yellow spots form on top leaves, while the lower older leaves will or may have gray specks and or spots. Symptoms can include yellowing of leaves while the leaf veins can stay green. Can also produce a chequered effect. As the plant gets newer growths the plant will seem to grow away from the problem, that’s why the younger leaves may be unaffected.

Cool thanks! So basically my plants are A Okay!?

Lockdown420 · Sep 7, 2011

Mix some cal/mag into your water.

Chronic Indica · Sep 7, 2011

JJ05 said:
Cool thanks! So basically my plants are A Okay!?

Yes they aren't looking very bad at all, good job btw.

wheezer · Sep 8, 2011

I agree. They look fine. I think sometimes we think that any yellow leaf is a problem, but really, it's very natural for older leaves to turn yellow, then brown, then die and fall off. It happens. The rest of the plant looks fine. Stop worrying, your doing a great job.

tristynhawk · Sep 8, 2011

yea your plants overall health looks great, i wouldn't worry about it i agree with wheez,

Tennis1 · Sep 8, 2011

I think it is leaf spot disease, but it's late in the season. The disease slows down in september and you don't have it that bad, so no worries.

tristynhawk · Sep 8, 2011

I have noticed on some of my plant's that i got under control and even one's that didn't get it, that the older fan leaves which are being used up in the plants life cycle are prone to developing it before they fall off. But if the plant has made it thus far she is fine.

Guerrilla for life....tristynhawk

TwistedGenetics · Sep 8, 2011

tristynhawk said:
I have noticed on some of my plant's that i got under control and even one's that didn't get it, that the older fan leaves which are being used up in the plants life cycle are prone to developing it before they fall off. But if the plant has made it thus far she is fine.

Guerrilla for life....tristynhawk

Very interesting, since I have noticed the same exact thing. I was starting to wonder if it wasn't leaf spot but something with my pH, but now I am reassured... Thank you!

poplars · Sep 8, 2011

is this leaf spot disease the latest grower hysteria?????

Is this the dreaded leaf spot disease?

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