Disease Hotline Issue 18


Day lily leaf streak. Photo from a pdf found at: http://www.doacs.state.fl.us/pi/enpp/pathology/pathcirc/pp376.pdf by R.M. Leahy & T.S. Schubert

Sclerotinia root rot on sunflower. Photo provided by: Howard F. Schwartz, Colorado State University, Bugwood.org

“Sclerotia” of Sclerotina stem rot inside infected stem. Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org

Powdery mildew on crape myrtle. Photo provided by: Robert Lambe, Virginia Polytechnic Institute and State University, Bugwood.org

Disease Hotline Issue 20


Alfalfa mosaic virus on potato. Photo provided by: Howard F. Schwartz, Colorado State University, Bugwood.org

Cercospora leaf spot on Bigleaf Hydrangea. Photo found at: http://www.aces.edu/pubs/docs/A/ANR-1212/

Cercospora leaf spot on rose. Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org

Daylily leafstreak. Photo found at: http://www.umass.edu/umext/floriculture/fact_sheets/pest_management/daylily_rust_streak.htm

Disease Hotline Issue 18


Puffball. Photo provided by: Nancy Gregory, Plant diagnostician, University of Delaware.

Peony blotch on tree peony leaves.

Hollyhock rust. Image found at the following website: http://www.plantpath.iastate.edu/pdc/node/142

Powdery mildew. Photo provided by: Mike Schomaker, Colorado State Forest Service, Bugwood.org

Giant puffball. Photo provided by: Joseph LaForest, University of Georgia, Bugwood.org

Bacterial leaf scorch distant view. Photo provided by: Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org

Bacterial leaf scorch. Photo provided by: Theodor D. Leininger, USDA Forest Service, Bugwood.org

Daylily leaf streak. Image found at http://hyg.aces.uiuc.edu/secure/subscribers/200611b.html.