Utah Plant Pest Diagnostic Lab

Diseases Diagnosed in September 2011

Verticillium Wilt

Scientific Name: Verticillium dahliae.

verticilllium wilt

Photo(s): Howard F. Schwartz Colorado State University, Bugwood.org

Situation: Peppermint

County: Cache

Fact Sheets: Utah Pests IPM


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


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


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


Leaf blight

Scientific Name: n/a

leaf blight

Photo(s): Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org

Situation: Yard

County: Davis, Salt Lake, Wasatch

Fact Sheets: Oklahoma State University


Leaf Spot

Scientific Name: Marssonina populi

leaf spot

Photo(s): William Jacobi, Colorado State University, Bugwood.org

Situation: Narrowleaf cottonwood

County: Uintah

Fact Sheets: None


Needle Blight (Dothistoroma)

Scientific Name: Mycosphaerella pini

needle blight

Photo(s): Robert L. Anderson, USDA Forest Service, Bugwood.org

Situation: Ponderosa Pine, Austrian Pine

County: Toole, Wasatch

Fact Sheets: None


Late blight

Scientific Name: phytophthora infestans

late blight

Photo(s): Howard F. Schwartz, Colorado State University, Bugwood.org

Situation: Tomato

County: Cache

Fact Sheets: None


Anthracrose

Scientific Name: Colletotrichum graminicola

anthracrose

Photo(s): Paul Bachi, University of Kentucky Research and Education center, Bugwood.org

Situation: Yard

County: Salt Lake

Fact Sheets: None


Construction Damage

Scientific Name: N/A

construction damage

Photo(s): Joseph O'Brien, USDA Forest Service, Bugwood.org

Situation: Gamble Oak

County: Davis

Fact Sheets: None


Angular Leaf Spot

Scientific Name: Psedomonas lachrymans

angular leaf spot

Photo(s): Howard F. Schwartz, Colorado State University, Bugwood.org

Situation: Persian Cucumbers

County: Salt Lake

Fact Sheets: None


Bacterial Leaf Spot

Scientific Name: N/A

bacterial leaf spot

Photo(s): R.K. Jones, North Carolina State University, Bugwood.org

Situation: Tomato

County: Cache, Uintah

Fact Sheets: Utah Pests IPM


Vein Clearing

Scientific Name: N/A

vein clearing

Photo(s): R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org

Situation: Cottonwood

County: Beaver

Fact Sheets: None


Powdery Mildew

Scientific Name: Sawadaea sp

powdery mildew

Photo(s): Powdery mildew on a maple leaf, Andrej Kunca, National Forest Centre - Slovakia, Bugwood.org

Situation: On ornamental plant

County: Utah

Fact Sheets: University of California, Davis

*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.