Utah Plant Pest Diagnostic Lab
Diseases Diagnosed in July 2013
Necrotic Ring Spot
Scientific Name: Ophiosphaerlla korrae
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
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
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
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.
Photo(s): A.C. Magyarosy, Bugwood.org
Situation: Cream Sausage Tomato
County: Salt Lake
Fact Sheets: None
Squash Mosaic Virus
Pathogen: See Fact Sheets
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
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
- Nutrient Deficiency
Photo/s: Utah State University Tree Fruit IPM Advisory, 2007
Problem: Chlorosis
Situation: Trees
County: Salt Lake
Fact Sheet: University of Arizona Extension