First report of rhizoctonia crown rot on Carpathian Bellflower (Campanula carpatica) in northern Italy.
During the summer of 2017, symptoms of a crown rot were observed on plants of Carpathian bellflower (Campanula carpatica) cultivated in a private garden located in Biella province (Northern Italy). A high incidence of crown rot was observed on 90-day-old plants grown in 10 pots (5 plants/pot). As the disease progressed, lesions developed on the stems, causing blight symptoms. Based on morphological characteristics, DNA sequence analysis and pathogenicity tests, the causal agent was identified as R. solani AG 4. This is thought to be the first report of crown rot of C. carpatica caused by R. solani AG 4 in Italy, as well as worldwide.