If you have noticed the dreaded dusty round patches with a flour-like appearance popping up on your plants’ leaves there is a good chance your plant has developed white powdery mildew. This powerful product’s main ingredient is myclobutanil, a chemical fungicide that will wipe out White Powder Mildew and other fungi such as: Rust Scab; Blight Poinsettia; and Black Spot. If you see this white powder growing, you will need to stop it fast as it will render buds unusable.
The pros of this product are that it rapidly deals with the growth of fungi on your plants, allowing them to fully recover, and is enough to treat 1,000 square feet a year. The cons are that it has been banned for use in Canada on medical marijuana, will cause lung damage if smoked and traces remain in the plant no matter when used so you should find a way of eating your buds if you do have to use this product.