Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of a leaf spot caused by Sphaerulina tirolensis on Rubus phoenicolasius.

Abstract

Diseased wineberry (Rubus phoenicolasius) leaves were discovered on 11 October 2013 in a small infestation at a sunny location near Indian Springs Road, Frederick, Maryland, USA. Although the proportion of diseased plants was estimated to be <10% of the population, several leaves had numerous, angular, discrete necrotic spots characterized by white or light grey, necrotic centres containing numerous pycnidia. Margins of lesions were distinct, thin and dark red. The causal pathogen was identified as Sphaerulina tirolensis based on morphological, genetic and pathogenicity analyses. This is thought to be the first report of S. tirolensis on R. phoenicolasius.