Copyright 2010-2011 Updated December 9, 2011 Ultralawn, Inc. 1055 East 260th Street Euclid, Ohio  44132 (216) 731-7756 (440) 951-3738 About • Lawn Care • Trees/Shrubs • Pest Barrier • Questions • Contact Lawn Diseases   We welcome the opportunity to answer your questions Lawn Diseases are generally caused by fungi. Environmental conditions such as high humidity, sudden temperature fluctuations, and heavy thatch conditions in the lawn are a few of the factors that can lead to disease problems.  Unfortunately, a disease can attack even the healthiest lawns. There are many different types of lawn diseases looking for a place to call their home.   Ascochyta leaf blight Brown patch Dollar spot Fairy ring Leaf spot Pink and gray snow mold Powdery mildew Red thread Rust Slime mold