Diseases Diagnosed in April 2013

    Diseases Diagnosed in April 2013

    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


    Pink Snow Mold

    Scientific Name: Microdochium nivale

    pink snow mold

    Photo(s): An area affected by pink snow mold on a golf course, William M. Brown Jr., Bugwood.org.

    Situation: Turf

    County: Salt Lake County

    Fact Sheets: Utah State University


    Tobacco Mosaic Virus

    Scientific Name: Tobacco Mosaic Virus

    tobacco virus

    tobacco virus

    tobacco virus

    tobacco virus

    Photo(s): Tobacco Wilt Virus on Tomato taken by Claudia Nischwitz, Utah State University.

    Situation: Tomato

    County: Grand

    Fact Sheets: Kansas State University


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

    Please Note: It can be difficult to diagnose turf disease by symptoms alone early in the season. The fungus is more easily seen after June. If no pathogens are detected, the diagnosis and recommendation will be based on symptom appearance and timing, host affected, and observations of disease trends for the area.

    1. Herbicide Damage (Carbapple)
    2. Nutrient Deficiency (Fir)
    3. Frost Damage (Barley)
    4. Lack of Light/temperature damage (Alkali bulrush)
    5. Unknown (Ornamental Spruce, Tree of Heaven)
    *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.