Slime molds cause concern among many turfgrass managers when they suddenly appear after heavy rains or watering in warm weather. Numerous species may be involved, including the common Physarum cinereum, and occasionally Mucilago spongiosa and Didymium crustaceum. Other species of Fuligo, Mucilago, Physarum, and Stemonitis have also been reported on turfgrass.