Sulfur Dust controls a large number of diseases! Control diseases on fruits, vegetables and ornamentals. Sulfur has shown to help control Rust, powdery mildew, Leaf Spot, Black Rot, Scab, and much more. The fine particle size allows for even coverage that can be applied as a dust or mixed as a spray. Sulfur is also great as a soil additive to adjust soil pH. Product is 90% sulfur. Not for sale in AK. 4 lb. bag.