Utah Plant Pest Diagnostic Lab
Diseases Diagnosed in September 2011
Verticillium Wilt
Scientific Name: Verticillium dahliae.
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
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
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
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
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
Photo(s): William Jacobi, Colorado State University, Bugwood.org
Situation: Narrowleaf cottonwood
County: Uintah
Fact Sheets: None
Needle Blight (Dothistoroma)
Scientific Name: Mycosphaerella pini
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
Photo(s): Howard F. Schwartz, Colorado State University, Bugwood.org
Situation: Tomato
County: Cache
Fact Sheets: None
Anthracrose
Scientific Name: Colletotrichum graminicola
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
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
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
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
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
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