Utah Plant Pest Diagnostic Lab
Diseases Diagnosed in April 2013
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
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
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
Tobacco Mosaic Virus
Scientific Name: Tobacco Mosaic Virus
Photo(s): Tobacco Wilt Virus on Tomato taken by Claudia Nischwitz, Utah State University.
Situation: Tomato
County: Grand
Fact Sheets: Kansas State University
Abiotic, unknown, and/or non-disease stressors in April.
Please Note: It can be difficult to diagnose turf disease by symptoms alone early in the season. The fungus is more easily seen after June. If no pathogens are detected, the diagnosis and recommendation will be based on symptom appearance and timing, host affected, and observations of disease trends for the area.
- Herbicide Damage (Carbapple)
- Nutrient Deficiency (Fir)
- Frost Damage (Barley)
- Lack of Light/temperature damage (Alkali bulrush)
- Unknown (Ornamental Spruce, Tree of Heaven)