Phytophthora and Rhizoctonia may both cause crown rot on ivy, so having
a lab identification may be important for choosing the appropriate control.
Lower leaves may show necrosis bleeding in from the stem.
Department of Horticulture, 134A Plant Sciences Bldg, Ithaca, NY 14853 USA, email: hort@cornell.edu | 607-255-4568/1789 | Fax, 607-255-9998/0599