Diseases Diagnosed in October 2012

    Diseases Diagnosed in October 2012

    Leaf Spot

    Pathogen: Pseudomonas viridiflava

    leaf spot

    Photo(s): William Jacobi, Colorado State University, Bugwood.org

    Situation: Narrowleaf cottonwood

    County: Uintah

    Fact Sheets: None

    Dutch Elm Disease


    elm disease

    Photo(s): USU site. Unknown photographer

    Situation: Dutch Elm Tree

    County: Not recorded

    Fact Sheets: USDA


    Pathogen: Rhizopus


    Photo(s): University of California, Davis

    Situation: Squash in storage

    County: Weber

    Fact Sheets: North Carolina 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

    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

    Abiotic, Unknown cause and non-disease stressors in October

    1. Nutrient Deficiency

      nutrient deficiency

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

      Problem: Chlorosis

      Situation: Flowering pear

      County: Salt Lake

      Fact Sheets: University of Arizona Extension

    2. Nutrition Deficiency - bronzing in grape leaves (grapes - Salt Lake)
    3. Unkown Bacteria (Squash)
    *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.