Cedar apple rust, cedar quince rust, and Iris leaf spot have images already posted to the site. Please use the search function to locate these pictures.
To the left is azalea petal blight. Photo provided by Bob Mulrooney, University of Delaware
Tag Archives: Iris leaf spot
Disease Hotline Issue 8
Coniothyrium bartholomaei on yucca looks similar to Mycosphaerella leaf spot. Photo is of C. bartholomaei. Photo found at: http://ipmnet.org/plant-disease/disease.cfm?RecordID=1160
Fruiting bodies (pycnidia) of C. bartholomaei on yucca are the black structures in center of the tan area. Photo found at: http://ipmnet.org/plant-disease/disease.cfm?RecordID=1160
Iris leaf spot on the plant. Photo provided by: R.K. Jones, North Carolina State University, Bugwood.org
Close-up of iris leaf spot. Photo provided by: R.K. Jones, North Carolina State University, Bugwood.org
Wilting caused by botryosphaeria canker on rhododendron. Photo found at: http://www.umassgreeninfo.org/fact_sheets/diseases/botryosphaeria_canker.pdf and taken by R. K. Jones, Diseases of Woody Ornamentals and Trees. APS Press
Disease Hotline Issue 12
Cedar-apple rust on crabapple.
Cedar-apple rust on crabapple.
Cedar-apple rust on eastern red cedar.
Cedar-quince rust on juniper.
Cedar-quince rust on Chinese hawthorn.
Cedar-quince rust.
Iris leaf spot. Photos by: Bob Mulrooney, Plant Pathologist, University of Delaware.