So, what do you find controls the scale the best, any varieties you see it more heavily on than others? In my yard I use a combination of Bayer's Tree and Shrub, and Organicde (fish oil) The fish oil kills off the scale immediatly as it suffocates them. Then the Bayers hopefully keeps them away. I have however found two varieties in my yard that I cant seem to erradicate the scale from, they are Purity and General McArthur. I spray it wil organicde once a week, and they just wont die!