Slime Mold (fungi – Physarum spp. and Fuligo spp.)

Host Grass: Hybrid Bermuda(Cynodon dactylon), Common Bermuda, St. Augustine Grass(Stenatophrum secundatum)

Cause and Symptoms: Dark gray-to-black crust-like material will form on the leaves and stems of turfgrass. The soot-type material rubs off easily on shoes and clothing. Slime Mold fungi feed on decaying organic matter splashed upon the leaves and stems. They do not feed on green grass and cause no damage other than shading.

Control and Management:  Slime molds can be removed from the grass by applying water under pressure with a water hose, mowing, or by brushing with a broom. No chemicals are necessary.

Content edited by: Young-ki Jo, ykjo@tamu.edu , Assistant Professor and Extension Specialist, Dept Plant Pathology & Microbiology, Texas A&M University, Texas AgriLife Extension Service, May 31, 2013