The University of Arizona

College of Agriculture and Life Sciences

Improving Lives, Communities and the Economy

Seiridium Canker of Cypress Trees in Arizona

Author: 
Schalau, Jeff
Publication Date: 
January 2012
Publication Number: 
AZ1557
Pages: 
3 pp.
Abstract or Description: 
Leyland cypress (x Cupressocyparis leylandii) is a fast-growing evergreen that has been widely planted as a landscape specimen and along boundaries to create windbreaks or privacy screening in the lower, middle, and higher elevations of Arizona. In July 2011, Seiridium canker (Seiridium unicorne) was confirmed on Leyland cypress in Prescott, Arizona. This fungal pathogen is also known to impact Italian cypress (Cupressus sempervirens). Seiridium canker was previously known to exist in coastal California and the southeastern coastal region of the U.S. between Virginia and Florida. Preliminary findings indicate that Arizona's arid environment gives rise to cankers that are drier in appearance and less obvious than those found in more humid environments making it more difficult to diagnose without a microscope. The confirmed presence of this disease could seriously impact residential and commercial landscapes as well as commercial nursery production and the landscape industry.
Language: 
English
Publisher: 
College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ)
Contributor: 
Plant Sciences, School of
Relation: 
rec'd 12/21/11, 1st draft 1/06/12, edits 1/06/12, approved 1/06/12
Keyword: 
Seiridiun
canker
disease
pathogen
fungal
Leyland
cypress
cupressus
Cupressocyparis
leylandi
Type: 
Text
Subject Category: 
Gardening/Horticulture
Plant Diseases