Michigan State University Turfgrass Scienceturf.msu.edu

Slime Mold

Jun 10, 2010 at 9:40am  —  Kevin Frank

I've recently been seeing some slime mold in turf.  Slime mold typically starts as a bright yellow, orange, purple or gray blob that causes some to ask, who puked in the lawn?  It usually occurs during hot, wet weather and only lasts a couple weeks. As conditions dry out the slime mold changes and produces fruiting bodies full of spores that cover turfgrass leaves. Turf leaves may turn yellow during this period if they are completely covered by spores.  Slime molds are not infectious and are considered one of those turf diseases that is more cosmetic than anything.  Fungicides are not necessary.  Washing the mold from the leaves or light hand raking will help get rid of it faster.