yeah probably dont give advice based on what you are guessing sounds maybe like it could be right.... sulfur burning is a very old method to kill powdery mildew, although i think you should wait and see if the baking soda works before you go the sulfur route.... however the old adage shines true here and an ounce of prevention is worth a pound of cure, there is a foliar called serenade that is ten bucks and change that if used basically ensures you wont have any mold problems. that shit can wreak havoc if you dont keep it in check, and can give you some serious respritory infections.
