Diseases Diagnosed in June 2012

    Diseases Diagnosed in June 2012

    Aspen Canker

    Scientific Name: Cytospora

    aspen canker

    Photo(s): Montana State University Extension Service

    Situation: Aspen Tree

    County: Wasastch

    Fact Sheets: U.S. Dept. of Agriculture Forest Service; Utah 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

    Cherry Necrotic Rusty Mottle Virus

    Scientific Name: Pathogen Unknown

    Photo(s): Image from the web. These images are from Google images, and have not been verified by UPPL.

    Situation: Bing Cherry

    County: Utah

    Fact Sheets: University of California Davis

    Coryneum Blight Shothole

    Scientific Name: Wilsonmyces carpophilus

    cornyneum blight

    cornyneum blight

    Photo(s): Coryneum Blight images from USU publications

    Situation: Peach

    County: Grand

    Fact Sheets: Utah State University; Colorado State University


    Scientific Name: Erwinia amylovora



    Photo(s): Shoot of an apple tree infected with fire blight. Note the "Shepherds crook" and scorched leaves; Fire blight canker on an apple tree. The bacterial ooze seen running down the branch can be transmitted by insects, water, and other methods. Utah State University.

    Situation: Crabapple

    County: Cache

    Fact Sheets: Utah State University; Utah State University


    Scientific Name: Pythium sp.


    Photo(s): Pythium on Impatiens by Pamela Robert, University of Florida.

    Situation: Impatiens

    County: Wasatch

    Fact Sheets: Penn 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

    Tomato Spotted Leaf Virus

    Scientific Name: Varies - transported by thrips

    tomato spotted leaf virus

    tomato spotted leaf virus

    tomato spotted leaf virus

    tomato spotted leaf virus

    tomato spotted leaf virus

    Photo(s): TSLV in a tomato taken by Claudia Nischwitz, Utah State University.

    Situation: Tomato

    County: Cache

    Fact Sheets: Utah State University Extension News; Cornell University

    Verticillium Wilt

    Scientific Name: Verticillium dahliae.

    verticilllium wilt

    Photo(s): Howard F. Schwartz Colorado State University, Bugwood.org

    Situation: Peppermint

    County: Cache

    Fact Sheets: Utah Pests IPM

    Western Gall Rust

    Scientific Name: Endocronartium (Peridermium) harknessii

    western gall rust

    Photo(s): Western Gall Rust taken by Joseph O'Brien, USDA Forest Service

    Situation: Austrian Pine

    County: Davis

    Fact Sheets: USDA

    Wheat Stripe Rust

    Scientific Name: Paccinia striiformis

    wheat strip rust

    Photo(s): Wheat stripe rust, Howard F. Schwartz, Colorado State University, Bugwood.org.

    Situation: On wheat

    County: Juab

    Fact Sheets:

    Abiotic, unknown and/or non-disease stressors in May.

    1. Chlorosis (Raspberry - Utah)


      Photo/s: Comparison of healthy (left) and chlorotic (right) raspberry leaves. Note the green veins on the chlorotic leaf from USU publication.

      Situation: Raspberry

      County: Utah

      Fact Sheets: Utah State University

    2. Abiotic (Alfalfa - Box Elder)
    3. Abiotic (Cucumber - Davis)
    4. Drought Stress (Turf - Cache)
    5. Frost Damage (Corn - Cache)
    6. Magnesium Deficiency (Tomato - Grand)
    7. Unknown (Bur Oak - Emery)
    8. Wind Damage (Apple - Wasatch)
    *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.