Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Sirococcus tsugae on Atlas cedar in Switzerland.

Abstract

In August 2021, an Atlas cedar (Cedrus atlantica) with defoliation in the periphery of the crown, dead twigs of about two-three years of age with brown needles, and partly secondary resprouting spanning across the whole crown was observed in the Canton of Lucerne, Switzerland. The causal organism was isolated from one branch showing severe disease symptoms and identified as Sirococcus tsugae based on morphological and cultural characterization as well as rDNA-ITS sequence analysis. This is thought to be the first report of S. tsugae in Switzerland.