Utah Plant Pest Diagnostic Lab
Diseases Diagnosed in September 2013
Powdery Mildew
Scientific Name: Sawadaea sp
Photo(s): Powdery mildew on a maple leaf, Andrej Kunca, National Forest Centre - Slovakia, Bugwood.org
Situation: On ornamental plant
County: Utah
Fact Sheets: University of California, Davis
Necrotic Ring Spot
Scientific Name: Ophiosphaerlla korrae
Photo(s): Necrotic ring spot, Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org.
Situation: Turf
County: Salt Lake County
Fact Sheets: Utah State University; Colorado State University
Summer Patch
Scientific Name: Magnaporthe poae
Photo(s): Summer patch in bluegrass, Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org
Situation: On turf
County: Carbon, Wasatch, Salt Lake
Fact Sheets: Colorado State University; Ohio State University
Bacterial Speck
Scientific Name: Pseudomonas sp.
Photo(s): Bacterial speck in a tomato plant taken by Claudia Nischwitz, Utah State University.
Situation: Tomato
County: Davis
Fact Sheets: Cornell University; University of California, Davis
Take-all Patch
Scientific Name: Gaeumannomyces graminis var. graminis
Photo(s): Take All Patch taken by Claudia Nischwitz, Utah State University
Situation: in Lawn
County: Wasatch
Fact Sheets: Purdue University; University of Connecticut
Cytospora Cankers
Scientific Name: Cytospora cincta
Photo(s): Signs of cytospora cankers on aspen and willow, William Jacobi, Colorado State University, Bugwood.org.
Situation: On aspen
County: Davis
Fact Sheets: Colorado State University; University of Illinois
Phytophthora Root Rot
Scientific Name: Phytophthora sp
Photo(s): (Top) Apple tree infected with root rot; (Bottom) Pepper plants showing signs of being infected with phytophthora root rot, William M. Brown Jr., Bugwood.org.
Situation: Laurel
County: Salt Lake County
Fact Sheets: Alabama Cooperative Extension System
Fairy Ring, Type II
Pathogen: Basidiomycetes
Photo(s): Fairy Ring Spot taken by Claudia Nischwitz, Utah State University
Situation: in Lawn
County: Cache, Wasatch
Fact Sheets: Plant Clinic; Turf files
Anthracrose
Scientific Name: Colletotrichum graminicola
Photo(s): Paul Bachi, University of Kentucky Research and Education center, Bugwood.org
Situation: Yard
County: Salt Lake
Fact Sheets: None