what is this powder?

[pongster]

hi bros,
one of my balcony plants is showing some stuff that i find strange, and cannot recognize it. i'm used to bugs in the balcony, but i'm not familiar with this "powder"

plants are auto malawi x nl, they are about 51 days old.
the only plants in the balcony afflicted are the ones close to the corner, i figure that air flow is not that good there.
the afflicted leaves are the lower ones and with more shade.

the plant itself does not seem to be suffering from this and it is developing fine,

pictures:

- the leaves afflicted show this powder...


- on microscope, on the left, the powder; on the right, a part of the same leaf that does not have the powder:


- the backwards of that leaf:


- zoom on the yellow muthafucka


my best guess is that the powder is some kind of fungus, fed by the excrements of those bugs?
the plants are early flowering, though i'm hesitant to spray anything on flowers, i'm open to ideas. maybe overreacting,

at my disposal i have neem oil and diatomaceous earth.

thanks for your insights!
cheers

 

[wh1p3dm34t]

seems powdery mildew, it can develop in areas with humidity and dry periods with frequent change
https://en.wikipedia.org/wiki/Powdery_mildew

try to use h2o2 1-3% to clean the leaves or bleach in 5% be careful to not drop it on the medium only touch the plant tissue

 

[pongster]

seems powdery mildew, it can develop in areas with humidity and dry periods with frequent change
https://en.wikipedia.org/wiki/Powdery_mildew

try to use h2o2 1-3% to clean the leaves or bleach in 5% be careful to not drop it on the medium only touch the plant tissue

thanks for the quick reply bro!
i was just uploading the picture of the place:


everything you said checks in place...
will get the h2o2.

thank you very much bro
cheers

 

[wh1p3dm34t]

some say milk also effective because if you alter the pH range around the fungi it can t function in higher alkaline 8-9 range so
milk can do it also with less effective strike

 

[dimodz]

use better buttermilk as usally milk




if i remeber right 1/3 buttermilk to water

 

[Lester Beans]

Baking soda, 1 Tablespoon to a gallon of water. First remove the affected leaves and discard, then spray plant. It's best to just remove anything you can and then spray. Good luck!

 

[Cadfael]

Do any of this ASAP. PM spreads QUICK.

 

[CodyPomeray]

raw milk, 1:2 or 1:4 or 1:10 with water, spray the plants. I say those ratios because it all depends on what stage of life you are at. I woudlnt spray 1:2 on flowering stuff.

 

[SeriouslySilly]

My understanding is that the pm is deeply entrenched in the plant tissue and spreading before it’s even visible.

If that’s correct, treating the symptom won’t get rid of the disease.

If it were my plant I would ditch it, or if it were the only one maybe just cut off the visibly affected areas and not share the poisonous harvest, but that’s just me.

 

[AgentPothead]

I've used GreenCure to good effect on outdoor PM, it's basically potassium bicarbonate mixed with water. Like whippedmeat says it's about changing the PH because the PM has a narrow window it can germinate in.

 

[Mr. J]

If you're in South America then most likely it's just cocaine blown in on the wind, nothing to worry about. Either that or powdery mildew. And aphids.

 

[pongster]

If you're in South America then most likely it's just cocaine blown in on the wind, nothing to worry about. Either that or powdery mildew. And aphids.

damn cocaine! it's everywhere, and actually easier to get than proper weed...

Do any of this ASAP. PM spreads QUICK.

My understanding is that the pm is deeply entrenched in the plant tissue and spreading before it’s even visible.

If that’s correct, treating the symptom won’t get rid of the disease.

If it were my plant I would ditch it, or if it were the only one maybe just cut off the visibly affected areas and not share the poisonous harvest, but that’s just me.

I've used GreenCure to good effect on outdoor PM, it's basically potassium bicarbonate mixed with water. Like whippedmeat says it's about changing the PH because the PM has a narrow window it can germinate in.

thanks everyone for your input, i truly appreciate it,

here's what an average morning looks like for those plants:

temperature: 25°C in the shade - humidity: 25%

so, after smoking a J and taking a bike ride, i decided to:
* cut most shaded parts and the ones more suitable for humidity.
* then, will remove the fan leaves with "heavy" pm, that are not in the "humidity zone".
* i'll try to make better air circulation there, moving those black containers.
* summer heat and dryness, along with better air circulation might provide a bad enviroment for PM.
* if more leaves are affected in the upper part, i will use the H2O2 stuff, and if it does not work, the bicarbonate potassium stuff.

most of my reasoning comes that summer is just around the corner and it's dry and hot... that is why i'm so surprised with fungus in december; but it's understandable that they develop in the lowest parts of the corner of the balcony... the only real place that some humidity can accumulate...

anyhow, will let you know how it goes and thanks again for all the inputs!
cheers


ps: sorry if i dont follow some advices or sound a little hard head, i just try to spend all the cultural options i have before going chemical, cheers.

 

[Hookahhead]

Potassium bicarbonate is “washing soda” and can be found in the laundry detergent aisle in a big cheap box.

 

[coxnox]

Eagle20 is very effective on pm but l would use it only on mother plant !

 

[TanzanianMagic]

hi bros,
one of my balcony plants is showing some stuff that i find strange, and cannot recognize it. i'm used to bugs in the balcony, but i'm not familiar with this "powder"

plants are auto malawi x nl, they are about 51 days old.
the only plants in the balcony afflicted are the ones close to the corner, i figure that air flow is not that good there.
the afflicted leaves are the lower ones and with more shade.

the plant itself does not seem to be suffering from this and it is developing fine,

pictures:

- the leaves afflicted show this powder...
[URL=https://www.icmag.com/ic/picture.php?albumid=81866&pictureid=1995027&thumb=1]View Image[/url]

- on microscope, on the left, the powder; on the right, a part of the same leaf that does not have the powder:
[URL=https://www.icmag.com/ic/picture.php?albumid=81866&pictureid=1995028&thumb=1]View Image[/url] [URL=https://www.icmag.com/ic/picture.php?albumid=81866&pictureid=1995029&thumb=1]View Image[/url]

- the backwards of that leaf:
[URL=https://www.icmag.com/ic/picture.php?albumid=81866&pictureid=1995030&thumb=1]View Image[/url]

- zoom on the yellow muthafucka
[URL=https://www.icmag.com/ic/picture.php?albumid=81866&pictureid=1995031&thumb=1]View Image[/url]

my best guess is that the powder is some kind of fungus, fed by the excrements of those bugs?
the plants are early flowering, though i'm hesitant to spray anything on flowers, i'm open to ideas. maybe overreacting,

at my disposal i have neem oil and diatomaceous earth.

thanks for your insights!
cheers

That is powdery mildew of some kind (there are many) being tracked around by aphids.

Most powdery anything doesn't react well with water, so just spraying the plant with a strong stream of clean water would be a start. Powdery mildew can also thrive because of a lack of airflow and lack of exposure to direct sunlight/UV radiation.

In fact there are UV lights you can buy that kills powdery mildew, like the Clean Light (there are smaller models).
https://www.youtube.com/watch?v=kqUUvKLgy28
https://www.amazon.com/Germ-Reaper-Ultraviolet-Sanitizer-effectively/dp/B07756448D

If you want to try something that can't damage your eyes like UV light, the way to go is create a fungal environment for your plants, especially during ripening.

https://www.icmag.com/ic/showpost.php?p=8716533&postcount=8

 

[AgentPothead]

Eagle20 is very effective on pm but l would use it only on mother plant !

Isn't Eagle20 banned in a lot of legal growing states? I know it's not legal to use on tobacco, which is the best thing to compare to since it's one of the few smoked produce, instead of being eaten or juiced and drank.

 

[Hold Your Fire]

I tried everything here except Raw milk. Or the uv light which I doubt works anyway. I did try whole milk.

Nothing got rid of it. It would disappear, and at first I would get excited and think this time it's gone but no. It kept coming back.

I kept 4 plants and took the time to brush each leaf with a paint brush. Then spray the whole plant Talk about a PITA.

I'd rotate between milk, peroxide, baking soda/water, safer brand fungicide,etc. It came back.

I'm not saying it can't be done. But I had no luck and for over 2 months I tried pretty hard to get rid of it.

Good luck trying to remove leaves without knocking loose any mildew and spreading it.

I'd never use Eagle 20, even if I could get it.

I'm in a legal state and it's unavailable here.

Good luck...

 

[coxnox]

Isn't Eagle20 banned in a lot of legal growing states? I know it's not legal to use on tobacco, which is the best thing to compare to since it's one of the few smoked produce, instead of being eaten or juiced and drank.

i dont live in usa so i dont know...and about comparing to tobacco, as i tell you i will use that only in last case to save my mother plant(if no other bio product have worked before), not on any plant in bloom or going in bloom.

 

[AgentPothead]

i dont live in usa so i dont know...and about comparing to tobacco, as i tell you i will use that only in last case to save my mother plant(if no other bio product have worked before), not on any plant in bloom or going in bloom.

I just prefer to use tobacco cause it's the only produce we dry and smoke that is regulated. So pesticides that aren't safe to use on tobacco can be inferred not safe to use on marijuana. But I agree with you man, if I had to try and save my GG#4 mother plant, I would also try literally anything.

 

[Drewsif]

Would that just spread myclo and pm.