Analysis - view details of type of pest/disease/disorder
  Index BFW

Ash bacterial canker - Pseudomonas syringae ssp. savastanoi pv.fraxini | deutsch

Symptoms    On stems, branches and twigs black, roundish or slightly elongated excrescences, at first smooth, later on rough; this symptom can be mistaken for those by the ash bark beetle; mesentery-like excrescences, which develop instead of inflorescences, are galls of the ash gall mite Aceria fraxinivora. They may resemble excrescences of ash bacterial canker, but occur only only twigs. The actual ash-dieback phenomenon (Chalara fraxinea) has nothing to do with ash bacterial canker.
Impact    Ash bacterial canker is produced by bacteria specific on ash. They enter the host tissues via wounds of various size, but even via lenticels. The disease is very common, but generally not endangering the trees; only heavily cankered ashes can be infected by secondary microfungi causing shoot- or branch-dieback
Control    In case of heavy infections hygienic measures: removal of infected trees
Hosts   Ash;
Affected plant parts    Shoot/Twig/Branch; Stem;

Ash bacterial canker: excrescences, early stage
Ash bacterial canker: excrescences, early stage
Ash bacterial canker

The shown graphical material is copyrighted. © 2006 BFW Wien. You can use the images for your own publications only if you name the source AND if you have a valid agreement with BFW Vienna. Furthermore images in high resolution are for sale at BFW.
In this case please contact (Department of Forest Protection) or , our PR manager.

Index BFW | Department of Forest Protection | Other types of damage | Back