A Canker Disease of Rocky Mountain Juniper Caused by Botryosphaeria stevensii. N. A. Tisserat, Assistant Professor, Department of Plant Pathology, Throckmorton Hall, Kansas State University, Manhattan 66506. A. Y. Rossman, and A. Nus. Research Leader, Systematic Botany, Mycology and Nematology Laboratory, BARC, Beltsville, MD 20705, and Research Assistant, Department of Plant Pathology, Throckmorton Hall, Kansas State University, Manhattan 66506. Plant Dis. 72:699-701. Accepted for publication 14 March 1988. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1988. DOI: 10.1094/PD-72-0699.

Botryosphaeria stevensii (anamorph Diplodia mutila) caused cankering of Rocky Mountain juniper (Juniperus scopulorum) in windbreak and ornamental plantings. Multiple, coalescing cankers resulted in branch dieback and sometimes tree mortality. The fungus also was pathogenic to and caused canker formation on eastern redcedar (J. virginiana) and Chinese juniper (J. chinensis) in greenhouse and field inoculation studies. Apple and juniper isolates were host-specific.