Utah Plant Pest Diagnostic Lab
Diseases Diagnosed in May 2011
Black Root Rot
Scientific Name: Thielaviopsis basicola
Photo(s): Black root rot on a tobacco plant, R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org.
Situation: On roots
County: Salt Lake County, Cache
Fact Sheets: Utah State University
Pink Snow Mold
Scientific Name: Microdochium nivale
Photo(s): An area affected by pink snow mold on a golf course, William M. Brown Jr., Bugwood.org.
Situation: Turf
County: Salt Lake County
Fact Sheets: Utah State University
Basal Rot
Scientific Name: Fusarium calmorum
Photo(s): Fusarium basal rot, A.F. Sherf, Cornell University.
Situation: On Garlic
County: Salt Lake County
Fact Sheets: Oregon State University; UC IPM
Spring Black Stem Disease
Scientific Name: Phoma medicaginis
Photo(s): Stems and leaves affected by black stem disease, University of Georgia Plant Pathology Archive, University of Georgia, Bugwood.org.
Situation: Alfalfa
County: Salt Lake County
Fact Sheets: Utah State University; University of Nebraska Lincoln
Crown Rot
Scientific Name: Fusarium oxysporum
Photo(s): Crown rot in onions characterized by browning of the leaves and stunted growth, Howard F. Schwartz, Colorado State University
Situation: na
County: Salt Lake County
Fact Sheets: Cornell University; UC IPM
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
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