|Cold, wet (32°-45° F)||Pink Snow Mold||Gray Snow Mold|
|Cold, wet (40°-60° F)||Yellow Tuft
Necrotic Ring Spot
|Basal Rot Anthracnose
|Warm, wet (60°-80° F)||Red Thread/Pink Patch||Dollar Spot||Leaf Spot|
|Hot, dry (70°-95° F)||Necrotic Ring Spot||Take-All Patch|
|Hot, wet (80°-95° F)||Anthracnose
|Rhizoctonia Brown Patch||Summer Patch|
Microscopic disease identification key
Adapted from the book The Microscope in Turfgrass Disease Diagnosis, with permission from the author, Pat Sanders, UW-Madison emeritus professor of turfgrass pathology.
If you have access to and basic knowledge of how to use a microscope, this key will help you identify the pathogen ailing your turf. The key has two parts: one using hyphae structures and the other using spores. You will need a little knowledge of these structures, so select the key that will best serve your needs and knowledge. If you can not determine your problem using these keys, please feel free to submit a sample to our lab.