powdery mildew in flower HELP

[Dr.Tone]

I have some plants that are in week 6 of 8 flower and 2 of 8 have powdery mildew, I stripped alot of fan leaves offthat were affected and sprayed with pm wash by npk industries, it still there, and heres the kicker, I have a scrog in week 2 and there just getting preflowers, in the same room, what should I spray on these to protech them for the next 6 weeks? I was thinking neem em up real heavy and turn the fans off and spray bleach solutions around the floors, I have some pretty nice airflow now, added another fan, humidity is 55 and im working on getting a hose on my portable ac to drain the water out. I used green cure but that just prevents it and burns pistols bad, this scrog is killer so really want somthing I can put on em to get them by, the scrog is currently unaffected, zero pm on it but I know its there cause the 2 plants next door were pretty bad but I got every affected leaf off. So I guess what im want to know is. What can i spray in early flower? and what can I spray in late flower? Thanks guys.

 

[Nes]

If you're trying to prevent it predding, I'd clean and spray something ment to outcompete like actinovate and bacillus subtilis

 

[SativaBreather]

CHECK THIS OUT

https://www.icmag.com/ic/showthread.php?t=287496

 

[betshtick]

Wow, I must say the before/after from that ATAK thread is super impressive. I would have said he was screwed. TYVM for posting that up Sativa.

You said the mfg told you it was copper based, so I'm guessing it's copper sulfate, or a "Bordeaux mixture." My mom has used it during the winter on her trees, but she gives them all kinds of treatments for various tree specific pests so never thought to ask about it. Should be able to get it local, but here is a pretty easy DIY recipe:

http://www.trumpetflowers.com/tutorials/make-your-own-copper-fungicide-spray.htm

 

[betshtick]

Oh, that Bordeaux/copper spray while natural is still pretty harsh. So for the OP, definitely still work on getting your environment dialed in, plucking leaves with visible PM, and I'd also go ahead and mix up a more mild control spray that you can use more frequently.

This is a standard bicarbonate spray recipe that is also an insecticide, so great all around preventative that's totally non-toxic and is really tough to overuse.

Add to 1gal water, don't adjust PH:
-1 tbsp baking soda
-2 tbsp neem oil
-2 tbsp Castile soap like Dr. Bronner's


Don't be afraid to be really aggressive stripping those fan leaves, too. Any leaf/stem that is in the shadow of another or lower down on the plant and getting less light is a prime target for mildew.

 

[JamieShoes]

I use a sulphur vape thingy from "HotBox" ... never had any troubles since getting it... search for "Hotbox sulfume"

 

[SativaBreather]

yeah they good too, but if you do get PM ATAK will sort it quickly and safely and leave no sulphur taste or long life residuals like that eagle shit

 

[JamieShoes]

yeah they good too, but if you do get PM ATAK will sort it quickly and safely and leave no sulphur taste or long life residuals like that eagle shit

excellent point, don't use the sulphur thingy on the ones with only 2 weeks left... I wouldnt use it for 3 weeks prior myself