Diseases Diagnosed in May 2011

    Diseases Diagnosed in May 2011

    Black Root Rot

    Scientific Name: Thielaviopsis basicola

    black root rot

    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

    pink snow mold

    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

    basal rot

    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

    black stem disease

    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

    crown rot

    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

    phytophthora root rot

    phytophthora root rot

    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

    nectrotic ring spot

    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

    *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.