Utah Plant Pest Diagnostic Lab

Diseases Diagnosed in September 2013

Powdery Mildew

Scientific Name: Sawadaea sp

powdery mildew

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

nectrotic ring spot

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

summer patch

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.

bacterial speck

bacterial speck

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

take all patch

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

cytospora cankers

cytospora cankers

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

phytophthora root rot

phytophthora root rot

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

fairy ring

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

anthracrose

Photo(s): Paul Bachi, University of Kentucky Research and Education center, Bugwood.org

Situation: Yard

County: Salt Lake

Fact Sheets: None

*Links on the page are not intended as authoritative sources of management information. Established links allow users to view pictures of pests and find general biology and control information; for Utah-specific control recommendations please contact the Utah Plant Pest Diagnostic Lab @ 435-797-2435. Pictures above are not always the exact species identified, but are representative photos of submitted samples.