Utah Plant Pest Diagnostic Lab
Diseases Diagnosed in October 2012
Leaf Spot
Pathogen: Pseudomonas viridiflava
Photo(s): William Jacobi, Colorado State University, Bugwood.org
Situation: Narrowleaf cottonwood
County: Uintah
Fact Sheets: None
Dutch Elm Disease
Pathogen:
Photo(s): USU site. Unknown photographer
Situation: Dutch Elm Tree
County: Not recorded
Fact Sheets: USDA
Rhizopus
Pathogen: Rhizopus
Photo(s): University of California, Davis
Situation: Squash in storage
County: Weber
Fact Sheets: North Carolina 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
Take-all Patch
Scientific Name: Gaeumannomyces graminis var. graminis
Photo(s): Take All Patch taken by Claudia Nischwitz, Utah State University
Situation: in Lawn
County: Wasatch
Fact Sheets: Purdue University; University of Connecticut
Abiotic, Unknown cause and non-disease stressors in October
- Nutrient Deficiency
Photo/s: Utah State University Tree Fruit IPM Advisory, 2007
Problem: Chlorosis
Situation: Flowering pear
County: Salt Lake
Fact Sheets: University of Arizona Extension
- Nutrition Deficiency - bronzing in grape leaves (grapes - Salt Lake)
- Unkown Bacteria (Squash)