Utah Plant Pest Diagnostic Lab

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.