I have heard it works also but if it were me in veg I would go with sulfer foliar. But I would wait for someone to chime in. Like I say I have never dealt with it but maybe some of these folks can help give you a better Idea @MIMedGrower@Burned Haze@oldskol4evr@Jimster@Dirtbag@PlumberSoCal. There are several more I'm sure have the right advice and even in this thread.
Like I say not 100% sure it is powdery mildew but better safe than sorry.
Thanks for the reply dirtbag your a grizzled vet respect your opinion...i cant figure it out I'm completely lost gonna let it go and see what happens...just wanted to be ahead of the game. Where would I get hard water residue? Filling jugs at around ph of 8.0 giving some ph down till around 6.5 7.5 organic soil with buffer. Have been seeing this for about 4cweeks but in very small dosages
Lol grizzled vet.. I'm not sure about that but appreciate the compliment. The best theory honestly is bird shit, it especially looks like that in the second pic. Is there a tree or anything above it?
I'd just wash it off with a spray bottle of compost tea or sulphur if you want to be safe that it doesnt cause a fungal infection. Or just remove it like you did.
Also doesnt look like leafhopper damage to me really. I'm fighting this bouncy pricks right now. They're actually kind of fun to mess with because you can tell they see you and walk around the stem to hide.. lol