Utah Plant Pest Diagnostic Lab

Diseases Diagnosed in October 2012

Leaf Spot

Pathogen: Pseudomonas viridiflava

leaf spot

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

Situation: Narrowleaf cottonwood

County: Uintah

Fact Sheets: None


Dutch Elm Disease

Pathogen:

elm disease

Photo(s): USU site. Unknown photographer

Situation: Dutch Elm Tree

County: Not recorded

Fact Sheets: USDA


Rhizopus

Pathogen: Rhizopus

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

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


Take-all Patch

Scientific Name: Gaeumannomyces graminis var. graminis

take all patch

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

  1. Nutrient Deficiency

    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

  2. Nutrition Deficiency - bronzing in grape leaves (grapes - Salt Lake)
  3. Unkown Bacteria (Squash)
*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.