I'm pretty sure that is not PM which would look like white talcum powder covering the leaves that would rub off on your fingers. That looks more like early stages of Botrytis (bud rot) to me.@InTheShed I have an urgent question. I hope it's ok to bring it in here for quick attention. I have just been checking trichomes and I came across this rather alarming sight. I have never had PM on a cannabis plant before. Is this what I am looking at here? Please zoom in.![]()
The challenge is that you really shouldn't use most fungicides while the plant is in flower and most "authorities" recommend you toss any plant effected by Botrytis.
Assuming you want to try to save the plant, I would separate it from any others, so it doesn't spread (when Botrytis matures, it releases spores!), remove any buds that have signs of infection and any nearby buds, check your humidity/temp/air circulation, and spray with a diluted H2O2 solution (50/50 water & 3% H2O2).
I wish I had better news and I could be wrong on the Botrytis, but don't think I am!
![Sorry :sorry: :sorry:](/community/styles/420style/smilies/sorry.gif)