Diseases Diagnosed in August 2012

    Diseases Diagnosed in August 2012

    Bacterial Diseases on Beans

    There are three different bacterial diseases in snap beans; 1.) brown spot, 2.) common blight and 3.) halo blight.

    Pathogen:

    1. Pseudomonas syringae pv. syringae
    2. Xanthomonas campestris pv. phaseoli
    3. Pseudomonas syringae pv phaseolicola

    bacterial disease on bean

    bacterial disease on bean

    bacterial disease on bean

    bacterial disease on bean

    Photo(s): Bacterial infection on beans, X. Campestris taken by Claudia Nischwitz, Utah State University.

    Situation: On green bean plant

    County: Davis

    Fact Sheets: Colorado State University; Iowa State University PDF Download; Cornell University 1; Cornell University 2


    Botryosphaeria Canker and Dieback of Trees

    Scientific Name: Botryosphaeria

    botryosphaeria canker

    botryosphaeria canker

    Photo(s): Tree taken by J.W. Travis, West Virginia, University; Pear taken by Mary Ann Hansen, Virginia Polytechnic Institute & State University

    Situation: Pear Tree

    County: Davis

    Fact Sheets: Virgina Tech


    Fusarium Stalk Rot

    Scientific Name: Fusarium moniliforme

    fusarium stalk rot

    Photo(s): Fusarium Stalk Rot in corn taken by Alison Robertson, Iowa State University.

    Situation: in corn

    County: Uintah

    Fact Sheets: Iowa State University


    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


    Potato Scab

    Scientific Name: Streptomyces scabies

    potato scab

    potato scab

    potato scab

    Photo(s): Potato Scab taken by Claudia Nischwitz, Utah State University

    Situation: Potato

    County: Beaver

    Fact Sheets: Cornell University


    Watermelon Mosaic Virus

    Pathogen: Watermelon Mosaic Virus

    watermelon mosaic virus

    Photo(s): Texas A&M Universary

    Situation: Squash, Pumpkin, Gourds

    County: Weber

    Fact Sheets: Utah State University Extension News; Cornell University


    Abiotic, Unknown cause and non-disease stressors in August

    1. Blossom End Rot

      Problem: Lack of Calcium

      Situation: Goji Berry

      County: Cache

      Fact Sheets: Cornell University; Oregon State University; University of California IPM; Learning Store

    2. Chemical (Peach - Utah)

      Problem: Sprayed with chemical at wrong time of season

      peach with chemicals

      peach with chemicals

      Photo/s: Cracked and leathery skins taken by Claudia Nischwitz, Utah State University.

      Situation:Skins cracked and leathery

      County:Utah

    3. Chokecherry Problem (Utah)
    4. Competition (Turf - Salt Lake)
    5. Forsythia Problem (San Juan)
    6. Witches Broom (tree)

      Problem: unknown cause

      witches broom

      witches broom

      Photo/s: Horse Chestnut with witches broom taken by Jim Hubbell.

      Situation: Horse Chestnut

      County: Cache

    *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.