Utah Plant Pest Diagnostic Lab

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.