Diseases Diagnosed in September 2013

    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.