RT Journal Article SR Electronic T1 A Cylindrosporium Leaf Spot on Oak JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 162 OP 164 DO 10.48044/jauf.1989.036 VO 15 IS 7 A1 Munkvold, Gary P. A1 Neely, Dan YR 1989 UL http://auf.isa-arbor.com/content/15/7/162.abstract AB A Cylindrosporium fungus was consistently associated with and isolated from circular leaf spots on Quercus rubra. It was examined in pure culture and on leaves by light and electron microscopy and identified as C. quercus Sorok. Growth of the fungus in culture was best at 27°C; germination of conidia was best at 24-27°C. Typical symptoms were produced on only 1 of 56 inoculated oak seedlings. This report is the first of C. quercus in Illinois and the first of a Cylindrosporium on Q. rubra.