Yellow Jacket Wettable Sulfur II is formulated for use as a dust or foliar spray for control of fungal pathogens, such as rusts, rots, spots, scabs, and mildews, and many mite species in many crops. Some crops may be sensitive to sulfur, please see label. It works on contact and by volatilizing and creating a dry and inhospitable environment for pathogens. It can also be used to control chiggers. Be careful of intervals between sulfur and oil applications as trapped sulfur can cause burn. Fineness of powder: Not less than 93% passing 325 mesh.