Wettable powders are formulated by blending dispersants and surfactants together and then milling to a very fine particle size. They can be applied as a spray or dust. Dry milled sulfur has been used in pesticide applications for over one hundred years. Our Yellow Jacket? agricultural sulfurs promote environmental responsibility by organically ridding ornamentals, flowers, vegetable, fruit, nut, and field crops of fungus, molds, and mites. Several forms are available.