Utah Plant Pest Diagnostic Lab

Diseases Diagnosed in June 2011

Peach Leaf Curl

Scientific Name: Taphrina deformans

peach leaf curl

peach leaf curl

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

cytospora cankers

cytospora cankers

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.

shothole disease

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

wheat strip rust

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

early blight

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

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


White Mold (Sclerotiniaceae)

Scientific Name: Sclerotinia sclerotiorum

white mold

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

phytophthora root rot

phytophthora root rot

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.

root rot

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.

apple scab

Photo(s): Ryan Davis USU

Situation: Apple tree

County: Utah

Fact Sheets: None

*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.