Powdery mildew, who's dealt with it outdoors

[NoTillPhil]

Any advice welcome......

Who's dealt with PM outdoors this early in season? Best way to proceed?

Products?

I've tried neem and baking soda methods but spots are still appearing.

Is a systemic fungicide the only answer?

Was looking at Greencure and a couple others.......

Thanks, PM before September is new to me and wasn't expecting it to be a problem here in SOCO. There is very little rain or humidity.

 

[Bear420]

you can try this out, but you said your dry there, are you sure it PM ?

 

[NoTillPhil]

you can try this out, but you said your dry there, are you sure it PM ?

Pretty sure. I think it came with some clones I brought into the yard. They came from an indoor grow and were first to show. I did kick off on a mid fifties night that I had sprayed need on. Of all things right? Freshly neemed and came down with PM, makes no sense to me. That was literally the first cool night we have had since planting.

Plants in video are in considerably worse shape than mine. I spotted it and started treating right away. However a few spots here and there keep showing up. From what I've read it's typical and likely to continue happening every time conditions present themselves.

I have a ton of effort and time into this garden so seeing it in June is freaking me out.

 

[Miyagismokes]

Remember that the area around the plant is higher humidity than advertised on the weather.
I typically do almost nothing for pm other than removing infected material, because sun and wind seems to do a fine job killing PM dead.
A simple oil spray works well for me, but clone tray tricks might help here--
Salicylic acid foliar spray. Salicylic acid triggers apoptosis in infected plant cells, so it'll look like leaf burn but this is GOOD and NORMAL. Keeps botrytis out of my trays, but can make for an ugly plant.
A tablet of unbuffered aspirin per gallon is how I do.

 

[NoTillPhil]

you can try this out, but you said your dry there, are you sure it PM ?

What would appear to be PM but not be? This type of PM is new to me. It sprung new spots on treated plants in 95degrees and 9% humidity. I see a couple pages and comments about PM liking hot and dry, but have always known it to come on in humid conditions. Clearly PM is just a blanket term used to describe any fungus growing on plants.

 

[Bear420]

What would appear to be PM but not be? This type of PM is new to me. It sprung new spots on treated plants in 95degrees and 9% humidity. I see a couple pages and comments about PM liking hot and dry, but have always known it to come on in humid conditions. Clearly PM is just a blanket term used to describe any fungus growing on plants.

You are correct, about the humid conditions. those are what you find PM mostly in, I have never heard of PM in dry conditions. I would suppose it's not impossible but I have never seen that.
Here's a Question for you. Do you water outside with any nutreints? and if you do you you spray it on you ladies ?
if the answer is yes then just maybe you are getting nutes on the leaves that can leave a residue.
What ever it may be I only hope the best for you. Keep me posted plz.

 

[Miyagismokes]

Clearly PM is just a blanket term used to describe any fungus growing on plants.

Not really.
It's a broad term for molds that grow that way; there are several species of pm.

I read that the grape industry uses a treatment that is a parasitic fungus that attacks pm, maybe you need that...

 

[Tim1987]

Hi Phil.

I used to personally get PM a lot outdoors where i am. PM loves my local climate.
One thing that comes to mind is, are you in full sun all day? My partly shaded plants were always the most likely to get it.
Any shade from a fence or tree, house etc?
Also always found physical removal to be the best treatment. As soon as you see it. Remove the effected vegetation on the plant, and destroy.
PM is such a bastard. I feel you. Ive had to pinch out big chunks of beautiful cola before, because of the monster. Lost whole plants too.
You gotta be on its case. As soon as you see it. Remove and destroy.
I havnt tried it before. But if its early in the season, and the plants are still vegging. One thing that may help is 1part whole milk to 10parts water, and spray as a preventative.
My grandmother always used it on her tomato plants, and it worked great. But i personally haven't tried it on dope. I always got it late in the season towards the end of bloom. It has to be whole milk you use too.

Good luck Phil.
Hope you get on top of it.

Tim.