Utah Plant Pest Diagnostic Lab
Diseases Diagnosed in June 2011
Peach Leaf Curl
Scientific Name: Taphrina deformans
Photo(s): Young peach tree with leaf curl, William M. Brown Jr., Bugwood.org; (Bottom) Peach leaf curl, Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org.
Situation: On peach
County: Davis
Fact Sheets: Utah State University; University of California Davis; Ohio State University
Cytospora Cankers
Scientific Name: Cytospora cincta
Photo(s): Signs of cytospora cankers on aspen and willow, William Jacobi, Colorado State University, Bugwood.org.
Situation: On aspen
County: Davis
Fact Sheets: Colorado State University; University of Illinois
Shothole Disease
Scientific Name: Stigmina sp.
Photo(s): Shothole disease, Whitney Cranshaw, Colorado State University, Bugwood.org.
Situation: On peach
County: Salt Lake County
Fact Sheets:
Wheat Stripe Rust
Scientific Name: Paccinia striiformis
Photo(s): Wheat stripe rust, Howard F. Schwartz, Colorado State University, Bugwood.org.
Situation: On wheat
County: Juab
Fact Sheets:
Early Blight
Scientific Name: Alternaria solani
Photo(s): Early blight affecting potato plant, Howard F. Schwartz, Colorado State University, Bugwood.org.
Situation: Tomato plants
County: Uintah
Fact Sheets: University of California Davis
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
White Mold (Sclerotiniaceae)
Scientific Name: Sclerotinia sclerotiorum
Photo(s): Howard F. Schwartz, Colorado State University, Bugwood.org
Situation: Cucumber, Lettuce
County: Cache
Fact Sheets: None
Phytophthora Root Rot
Scientific Name: Phytophthora sp
Photo(s): (Top) Apple tree infected with root rot; (Bottom) Pepper plants showing signs of being infected with phytophthora root rot, William M. Brown Jr., Bugwood.org.
Situation: Laurel
County: Salt Lake County
Fact Sheets: Alabama Cooperative Extension System
Root Rot
Scientific Name: Rhizoctonia sp.
Photo(s): Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org
Situation: Lavender from greenhouse
County: Utah
Fact Sheets: None
Apple Scab (Venturiaceae)
Scientific Name: Ventuia inaequalis.
Photo(s): Ryan Davis USU
Situation: Apple tree
County: Utah
Fact Sheets: None