Hey Growmie,
At first glance, it looks like trichomes but once you zoom in it looks like it could possibly be mildew. A few things people use to fix this issue are Baking soda (2 tablespoons per gallon of water), Neem Oil (4 teaspoons per gallon of water), Hydrogen Peroxide (1 teaspoon of 35% H202 per gallon of water), SM-90 (1:5 ratio of SM-90 to water). Hopefully, I answered your question and remember ..."Happy Growing" and "Free your mind one puff at a time"