You can safely smoke SMC residue. It's less of a fungicide than a physical barrier preventing the spores taking hold. Just FYI.
stinkyattic Reviewed by stinkyattic on . About to chop plants....powdery mildew Powdery mildew spores have finally appeared on the upper fan leaves of my plants, I am about to chop em all and clean the whole area and just start over. Any reasons why I should not, (a miracle way to stop powdery mildew 30 days into flowering?) Rating: 5