Utah Plant Pest Diagnostic Lab

Diseases Diagnosed in July 2012

Coryneum Blight Shothole

Scientific Name: Wilsonmyces carpophilus

cornyneum blight

cornyneum blight

Photo(s): Coryneum Blight images from USU publications

Situation: Peach

County: Grand

Fact Sheets: Utah State University; Colorado State University


Fusarium Stem Rot

Scientific Name: Fusarium sp

fusarium stem rot

Photo(s): Oregon State University Plant Clinic

Situation: Mountain Mahogany

County: Cache

Fact Sheets: None


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


Slime Mold

Scientific Name: NA

slime mold

slime mold

Photo(s): Slime mold fruiting bodies, Joseph LaForest, University of Georgia, Bugwood.org; Slime mold on forest floor, Tarah Kolb, Bugwood.org.

Situation: Forest floor

County: Wasatch

Fact Sheets: Utah State University; Colorado State University; Colorado State University Extension


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


Abiotic and non-disease stressors in July

  1. Drought Damage (Golden Raintree - Washington)
  2. Herbicide Damage (Ash - Davis)
  3. Moss (Turf)
  4. Physiological Leaf Spot of Tulip Trees

    leaf spot

    leaf spot

    Photo/s: Physiological Leaf Spot of Tulip Trees taken by Claudia Nischwitz, Utah State University

    Situation: Tulip Tree

    County: Salt Lake

    Fact Sheets: None

  5. Wind Damage (Japanese Pagoda - Davis)
  6. Winter Stress/Injury (Swedish Aspen Tree - Wasatch)

winter injury

Photo/s: Winter Injury taken by Mike Kuhns, Utah State University.

Situation: Injury in arborvitae

Location: Cache, Weber

Fact Sheets: Utah State University; Utah State University

*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.