Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of kalanchoe leaf and stem spot caused by Corynespora cassiicola in Denmark.

Abstract

In October 2015, stems and leaves of Kalanchoe (Kalanchoe blossfeldiana) were observed affected by what appeared to be a fungal disease in a commercial nursery in Denmark. It is estimated that up to 5 to 6% of the plants were affected at different growth stages. The symptoms were dark brown, sunken, necrotic lesions at the base of the plants, expanding to the stem and lower leaves. Severely affected plants showed extensive crown rotting and defoliation. The causal fungal pathogen was isolated from lesions on potato dextrose agar. Based on morphological characteristics, sequence analysis of the internal transcribed spacer region and pathogenicity tests, the causal agent was identified as C. cassiicola. This is thought to be the first report of leaf and stem spot caused by C. cassiicola in Kalanchoe in Denmark.