different ways to fight it ...
Spray water with a basic pH (between 8 and 8.5), and repeat the application every 3 or 4 days.
Spray a solution of water and milk (90% water and 10% milk).
Spraying a mixture of water and a little hydrogen peroxide is also very effective.
Ionizer: Installing this device to clean and purify the air in your grow room can help prevent the appearance and growth of powdery mildew.
We do not recommend ...
Sulfur: Although sulfur spraying is a fairly common measure for the treatment of powdery mildew in plants, we do not recommend the application of this method for cannabis cultivation because the flowers retain the aroma and flavor of the product.
Bicarbonate: Spraying bicarbonate dissolved in water can be effective against powdery mildew, but we do not recommend the use of this method if your plants are in the middle of flowering because it will leave visible traces.
Non-organic products to treat powdery mildew: it is true that there are systemic fungicides capable of effectively treating powdery mildew infections, we do not recommend the use of products that are not organic, because this type of chemical products end up in your body when you use cannabis can be harmful to your health. If you still decide to use them, we recommend that you carefully read the manufacturer's instructions, always follow safety periods and perform a root wash to eliminate the product from the plant system as much as possible.
Good luck for your grow May the force be with you 💪