Auntie Janes Nursery
Well-Known Member
Have you tried wettable sulfur?? Not sure I am convinced PM is systemic. It is mainly environmental and health of plant.
STRAINLY
- Thread starter jungle666
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CaliWorthington
Well-Known Member
Well apparently it is up for debate.
Is Powdery Mildew Systemic?
I have not tried wettable sulfur I'll look into it, thanks. Found it. Bonide also makes a liquid copper fungicide for PM.
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UpstateRecGrower
Well-Known Member
In my experience it is systematic. Once a plant has it you have to keep an eye on it and treat it forever.
Herb & Suds
Well-Known Member
That would make most of the country permanently having PM
Not just weed
CaliWorthington
Well-Known Member
I'm hoping to get a clean cutting off this plant eventually. Then I will pcr test the new clone. If that doesn't work I'll burn it.
Aheadatime
Well-Known Member
In my experience, it's not systemic. You can trim off the effected leaves, spray the plant with sulfur (or burn sulfur after reading up on how to do it safely), and fix whatever is going on in the environment, and then it's gone for good. Regalia is good stuff too. It's an organic foliar systemic preventative. Some of the bigger grows near me use it every week in veg, and week 1 and week 2 of flower.
Low light levels, stagnant air, and higher humidity is what you should look out for. Get stronger lights (especially in veg where alot of people are still using t5's or ambient lighting), trim fan leaves to let light penetrate, and lollipop the lower branches and leaves regularly. Get fans going all over the place. Control your humidity, especially at night time when the lights are out and PM has a better environment to have fun.
Auntie Janes Nursery
Well-Known Member
Most of the newer science points to it not being systemic. Even the way it attacks the plant is really from the outside in. It is like a weed though. It feeds off the plant, it doesn't travel in the xylem though. It is an airborne critter that latches on like a tick. Then grows from there. The benefit of the wettable sulfur is it gives you a protective coating for about 2 weeks that the pm can't puncture. This allows you to get the rest of your environment in line. One of the best sanitation treatments is UVC light or Ozone. Have to move the plants though to do those. But that allows you to spray down the plants out of your room while your room is being sanitized. Just research about the dangers of ozone and UVC before you do. It is harmless to you if used correctly.
Auntie Janes Nursery
Well-Known Member
I will take a few leaves every now and then, throw them in a ziplock with a moist paper towel and throw them in a drawer for a few days and see if PM pops up. It is not 100% indicative of a clean environment but it is as good as a test as I could come up with. With ipm management you never really know if you are free or just masking something so always good to check. Have never had a spec of PM in my garden (knock on wood). But have definitely seen others win the battle.
UpstateRecGrower
Well-Known Member
most of the country has uv light.
CaliWorthington
Well-Known Member
I have an exhaust fan on a sequence timer day and night. I have dozens of other plants that are not showing PM, just this one clone that I recently bought. It's now in a brand new tent by itself, in a different room, on a different floor, so it's not picking it up from the environment in my veg room, it's in the plant. We'll have to agree to disagree here I guess. I'll look into Regalia, thanks.
I own and use a Uvonair 1000. It's not my environment that's out of line, it's this clone. Now, a friend recently told me the same thing happened with a friend of his. He sold a clone for $500, buyer got PM, both swear they don't have PM. I believe the change in environment can trigger the PM, but this doesn't mean one environment is better or worse than the other. I'm sure it's drier here than where the clone came from.
Anyway my computer keeps turning itself off so I might not be posting for a few days.
UpstateRecGrower
Well-Known Member
Yep, had the same thing happen. My quarantine is dry, definitely not humid, recently I had a clone show pm from neptune, keeps coming back but no other plants show the pm, not the environment sorry.. I have gotten clones from a friend that allegedly never has pm in his grow but every clone he has ever sent will show pm
CaliWorthington
Well-Known Member
Yeah I'm totally with you on this, but I guess everybody's experience is different.
quiescent
Well-Known Member
If your rH is too low and you're not watering in small, frequent doses you are also going to have PM issues if present. There's a million ways to exacerbate the problem, thinking you're fixing it by going to the opposite extreme.
CaliWorthington
Well-Known Member
In my case, the clone showed PM a week after it arrived, I barely had a chance to water or feed it. If my environment is the problem, then why do these mother plants look perfectly healthy? Or how about the Zkittlez clone in the third photo? It was heat stressed (in shipping) to the point of shock, it's been recovering for weeks. I swear the apical shoot is gonna start growing any day now. Surely in it's weakened state it would have contracted PM if my environment was the culprit.
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PJ Diaz
Well-Known Member
PM is only visible when the fungus blooms. The clones were likely already infected with PM, but they had been kept from blooming. You are just seeing the end of the PM life cycle. Hopefully you can stop it before it spreads. I'd suggest a complete spray down of your grow area with H2O2.
CaliWorthington
Well-Known Member
OK I agree with this, I don't believe the clone picked up PM here and it bloomed in one week. I already ran the Uvonair and sprayed all my plants with Procidic. I'll spray that H202, thanks. I like to spray surfaces with Physan 20 it also works well.
Auntie Janes Nursery
Well-Known Member
Did you run the uvonair in the tent?? Those things are not the strongest producers of ozone which is why you can run it with plants in there. Won't fully sanitize. Also spraying down the soil and the pot and making sure you spray every part of the plant is vital. Never used procidic. Not sure to its effect. But I will say this, I have not seen one bit of research that shows PM traveling through the xylem which is the only way it can become systemic. I mean it has been studied at another level recently as well and still that conclusion. I think it is still something you are overlooking in the environment.
Auntie Janes Nursery
Well-Known Member
Also some plants are more susceptible to pm than others. Older genetics that haven't been bred for it are more prone.