Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of dieback on Euonymus fortunei caused by Cylindrocladiella parva in Germany.

Abstract

In August 2011, a severe shoot dieback was observed on several hundred plants of one-year-old E. fortunei cv. Emerald 'n Gold in a nursery in Lower Saxony and on a cemetery in Berlin, Germany. Single shoots or the whole plant were affected. Chocolate brown lesions around the shoots spread primarily acropetally to be followed by wilting of the shoot tip, reddish discoloration, dropping of leaves, and finally plant death. Two fungal isolates, JKI 2187 and JKI 1288, forming white mycelium on 2% malt extract agar were obtained from symptomatic shoots. Both were identified as Cylindrocladiella parva based on morphological observations, molecular investigations (sequencing of the rDNA internal transcribed spacer region and β-tubulin gene) and pathogenicity tests. This is thought to be the first report of C. parva as a pathogen of E. fortunei. Since 2011, there were no further reports of this disease. At present, the disease is not of economic importance.