Diseases Diagnosed in July 2013

    Diseases Diagnosed in July 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


    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


    Fireblight

    Scientific Name: Erwinia amylovora

    fireblight

    fireblight

    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


    Crown Gall

    Pathogen: Agrobacterium tumefaciens

    Situation: Hybrid Poplar/Cottonwood

    County: Salt Lake

    Fact Sheets: University of Illinois


    Curly Top

    Scientific Name: Germinirirus sp.

    curly top

    Photo(s): A.C. Magyarosy, Bugwood.org

    Situation: Cream Sausage Tomato

    County: Salt Lake

    Fact Sheets: None


    Squash Mosaic Virus

    Pathogen: See Fact Sheets

    squash virus

    Photo(s): Photo of Squash Mosaic Virus by Dr. Claudia Nischwitz, Utah State University

    Situation: Squash

    County: Davis

    Fact Sheets: Insect Vectors of Vegetable Virus Diseases USU; UC Davis


    Botryosphoria Canker and Tree Dieback

    Pathogen: Botryosphaeria

    canker tree

    Photo(s): Tree taken by J.W. Travis, West Virginia, University

    Situation: Box Elder Tree

    County: Cache

    Fact Sheets: Virginia Tech


    Phytopthora Root & Collar Rot

    Pathogen:

    Situation: Peach Tree

    County: Washington

    Fact Sheets:


    Bacterial Stalk Rot

    Pathogen:

    Situation: Corn

    County: Uintah

    Fact Sheets:


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

    Iron Chlorosis

    1. Nutrient Deficiency

      iron chlorosis

      Photo/s: Utah State University Tree Fruit IPM Advisory, 2007

      Problem: Chlorosis

      Situation: Trees

      County: Salt Lake

      Fact Sheet: University of Arizona Extension


    Herbicide Damage

    herbicide damage

    herbicide damage

    *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.