Almost perfect run about to be destroyed by POWDERY MILDEW

F.Dupp · Feb 10, 2024

Hey all. I'm on day 28 with some Dantes Inferno #8. Things have been going great up until a couple days ago when I saw a couple PM spots on lower leaves. I removed those leaves. Today I'm finding spots all over. I know this doesn't end well. I'm looking for any suggestions to combat this shit without harming pistils or trichs. The plants were treated with Regalia 5 times. Twice in clone, twice in veg, and once at week 2 of flower. And still this.
I'm running co2, temps at 85 day/79 night, humidity at 60% (1.5vpd)

cannafarmer420 · Feb 10, 2024

60% humidity in flower is too high to me, 50% max at that point for me, 85 F Is above what I usually have in flower 78 to 80, were you trying to chase vpd? I only passively observe the vpd, I don't really care about it. Good luck ✌

F.Dupp · Feb 10, 2024

cannafarmer420 said:
60% humidity in flower is too high to me, 50% max at that point for me, 85 F Is above what I usually have in flower 78 to 80, were you trying to chase vpd? I only passively observe the vpd, I don't really care about it. Good luck ✌

I used to try to stay around 50%. But when I brought co2 into the picture and raised temps to 85, it was feeling a bit desert like.
I was dealing with PM issues even at 50% or lower some years. PM is bad where I live. And it was really bad this fall.

Lockebox · Feb 10, 2024

You can spray it with zerotol
If you want to..

F.Dupp · Feb 10, 2024

Lockebox said:
You can spray it with zerotol
If you want to..

I've never tried it. Have you? If so, what's your experience with it? Does it damage flowers?

Lockebox · Feb 10, 2024

F.Dupp said:
I've never tried it. Have you? If so, what's your experience with it? Does it damage flowers?

I’ve never used it in my own grow but we use it at work. It can be sprayed up until harvest I believe

F.Dupp · Feb 10, 2024

I'm ordering it now. Do you recommend a particular dilution rate?

climbit · Feb 10, 2024

Can you please take a better picture of the affected leaves? Half the leaf is blurry

cannafarmer420 · Feb 10, 2024

F.Dupp said:
I used to try to stay around 50%. But when I brought co2 into the picture and raised temps to 85, it was feeling a bit desert like.
I was dealing with PM issues even at 50% or lower some years. PM is bad where I live. And it was really bad this fall.

You hit certain conditions and it simply cannot grow, also proper air flow is essential so the spores can't land. I am around 30% at the end of flower at 78 to 80, never have any issues. I simply lower throughout flower. I have PM in the yard but never my plants

F.Dupp · Feb 10, 2024

climbit said:
Can you please take a better picture of the affected leaves? Half the leaf is blurry

Sorry.

F.Dupp · Feb 10, 2024

cannafarmer420 said:
You hit certain conditions and it simply cannot grow, also proper air flow is essential so the spores can't land. I am around 30% at the end of flower at 78 to 80, never have any issues. I simply lower throughout flower. I have PM in the yard but never my plants

I also run perpetual and have plants of different stages in the room. So it's hard to keep everything happy

climbit · Feb 10, 2024

F.Dupp said:
Sorry.View attachment 2118191

Bro. Fight that shit! That’s so many plants to lose out on dude.

F.Dupp · Feb 10, 2024

I was expecting big things from this run. This strain has been a champ, but appears more susceptible to PM than my others. It's my first time doing a full run of it.

climbit · Feb 10, 2024

F.Dupp said:
I was expecting big things from this run. This strain has been a champ, but appears more susceptible to PM than my others. It's my first time doing a full run of it.View attachment 2118193

What strain is this? What website did you cop from?

F.Dupp · Feb 10, 2024

climbit said:
What strain is this? What website did you cop from?

Dantes Inferno #8. I got it from Black Bear nursery. But the clone was clean. The mom is clean. My Capjunky started showing it in the fall. But it was showing up late in flower and was light. It didn't show up in week 3 like is happening now.

F.Dupp · Feb 10, 2024

I bought a gallon of ZeroTol HC and a heavy duty thermal fogger so I can cover the entire room. I can't find ZeroTol 2.0 locally and they only sell 2.5 gal containers online. So shipping is insane.

Natep · Feb 10, 2024

Try lost coast plant therapy. You might be able to save it. Do that then rinse after harvest

F.Dupp · Feb 10, 2024

Natep said:
Try lost coast plant therapy. You might be able to save it. Do that then rinse after harvest

I have used that. It ruins the buds in my experience. And I hate washing post harvest.
Once you spray products like that, new flower clusters grow around it and it cannot be completely washed away. I try not to spray anything that leaves any residual product behind. I can always taste it.

GoldenDragondnw · Feb 10, 2024

Lemon juice

F.Dupp · Feb 10, 2024

GoldenDragondnw said:
Lemon juice

Sounds like it would fry pistils.

Almost perfect run about to be destroyed by POWDERY MILDEW

Almost perfect run about to be destroyed by POWDERY MILDEW

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Almost perfect run about to be destroyed by POWDERY MILDEW

Almost perfect run about to be destroyed by POWDERY MILDEW

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