What Deficiency Is This?

[Akeldama]

To me it either looks like a potassium or manganese deficiency but I'm not sure. Its pretty much on all 12 of my plants, some worse than others.

If anyone could help before it gets worse that would be great

[Sledge]

Some great info here:
http://www.420magazine.com/forums/problems-pests-disease-control/81275-cannabis-plant-pest-problem-solver-pictorial.html

[trichcycler]

are those clones?   the bad leaves look like original cutting leafs. I'd snip em off, before they become food for someone.... the other new growth looks good.

[pergamum362]

Yah man, they look fine but when in doubt, flush and feed.

[Akeldama]

They were clones but these are not original cutting leafs. These plants are in second week of 12/12, vegged for a month from clone. I snipped off a lot of the affected leafs and flushed last night but it seems the newer leafs are getting bad also. Any other ideas?

And thanks for the link Sledge. To me it looks like a phosphorus deficiency but I'm unsure. I guess I will feed with what I have been feeding after the soil dries up a bit from the flush 

[trichcycler]

if your nutrient system is a complete one, and your ph is right, I think it'll correct itself soon. I rarely have found that adding anything other than clean pure water will "fix" any issue that arises.. As long as the atmosphere in there is within reason, you'll soon be enjoying some good meds!

 

happy growing !

[Akeldama]

It seems to be spreading to other leafs after I cut off the other ones tho, going right up the plant. And they are under a 600w hps, humidity around 40%, temps at 75F

[AmishRnot4ganja]

Did you check the soil pH when you flushed? You need to add nutrients to the last load of water when you are flushing.

.

[Akeldama]

PH was around 7 and no I didn't add nutes again yet. Should I do that now even tho the soil is still pretty wet?

[pergamum362]

No, better just wait. What is your medium?

[Akeldama]

Sunshine mix #4. Today I noticed a couple leaves had a white powdery substance on them. I checked the plants for bananas as they might have hermied but didn't see anything. Could it be powdery mildew?

[trichcycler]

white powdery substance is most likely mildew, indicating atmospheric issues being conducive to mold growth.

[Akeldama]

Yeah the humidity went up like crazy after I flushed them. I've read 90% water mixed with 10% skim milk with a couple drops of soap with cure the mildew

[Akeldama]

I read that powdery mildew takes a week to show the powder though I just flushed the plants yesterday. Could this be pollen from a hermie instead?

[pic book]

this is in a basement, right? in soil-less?  

i get the same rust in soil-less, it goes away when i transfer the affected pot to hydro, but until then it climbs from the bottom leaves up.. .. is the trunk affected?  looking dried?

as for wpm, rust, botritis;  I use eagle 20 in veg, and after that rust and mold stays away from new upper growth and the old affected leaves continue to dry out and crisp to dust, leaves falling...hope helps.

[Chauncy Gardner]

Eagle 20EW (Dow) wipes powdery mildew out so well that it may never return.

[pic book]

today?  since you are in flower, too late for a systemic.

I'd drop ro% to 22 and drop day temp to 66 and night to 59.

this will stop the spread--wpm hates the cold and dry and your plants will compensate for the ro% by producing more resin.

and keep pots barely moist not wet or flooded, greater soil moisture=greater wpm

[trichcycler]

If I use ANY sprays in either rooms a large population of my worms will die. That's scary enough for me to avoid ALL non organic choices. It might be best just to lower the humidity with a dehum, heat, airflow, especially at lights off?

[blindman21]

Eagle 20EW (Dow) wipes powdery mildew out so well that it may never return.

right on ..  couldn.t agree more.

[imiubu]

Friend just had a bad case of wpm and used the milk recipe above,

wiped it out to never return... well, not thus far (6wks) so, maybe

there is something to it?

 

Good luck

[pergamum362]

Lol, itll be back...when he least expects it.

[Akeldama]

Yeah I have read alot about the milk method with wpm. Tho looking at my plants today there is no white dust/mildew anywhere. I snipped off the leafs that had it on, which were only two and I don't see any today. 

I plan to clean the tent with 10% bleach, 90% water just to be sure. I honestly think one of the plants got too stressed and hermied and let the pollen out, which would suck.

[pergamum362]

Air flow man...you wouldnt see pollen on the leaves.

[Letterhead954]

I have one plant in my garden, a Kosher Kush, that has some leaves that look exactly like Akeldama's, especially the pattern of the brown spots. I've had a little PM in my flower room, but none in veg where the KK is. That, and I started adding an organic fungicide once or twice while watering in veg. I feed this one exactly like I treat the others, so it must be something peculiar to this strain. So... what's the problem with our plants? 

I checked out the link about plant problems. Which brings on another question. Once in a while I'll have a strain or just one particular plant that will put out twisty leaves. The article indicates that that is from a ph that is too high. I was having a problem with that with my Sour Lifesaver plants. After adding more magnesium the problem went away, but I still occasionally have the problem with other strains and plants. Any input on this? 

[Akeldama]

I wouldn't see pollen on the leaves if a hermie sack opened up and dropped pollen out?