WPM : I have alot of humidity and lower temperatures I have to deal with , WPM is a a constant problem in the winter , if I don't do preventative spraying on the plants throughout the grow. Factor 1:7 , 1 -Milk , 7 - Water , in a gallon of water , not a perefect measurement is needed for water to milk ( Factor ), a pinch of baking soda , not alot , just enough to change the PH on the leaves and surrounding soil surface , a few drops of oil . I also spary the buckets and the grow area . All three , Milk , baking soda and oil , are agents that kill and prevent the mildew . Baking Soda changes the PH , dries out the exterior of the leaves as well . The oil drops puts a slick surface on the leaves which WPM doesn't like to grow on . The milk has fatty acids in it , the plants seem to be liking being sprayed with the water, milk combo . All organic and it works . WPM starts to show up here mostly in the winter rainy for me , that's when I start using the foliar spray to fight back . I use it until I'm going to harvest . Before I harvest , I make sure any baking soda - milk - residue is removed from the bud just so I don't have to smoke milk by spraying the plants with water and letting them dry out until they're ready to harvest . Couldn't hurt to smoke it , it's a mental thing :)