Fusarium avenaceum, Haupterreger der Himbeerrutenkrankheit in Norddeutschland

Evaluation of Rubus genetic resources on their resistance to cane disease

“…Future studies will reveal, whether A. alternaria indeed behaves saprophytic on raspberry canes or if some pathovars are capable of infecting raspberry canes and, thus, contribute to cane diseases. On the other hand, F. avenaceum has been shown to be the main pathogen causing cane disease in northern Germany, which is thought to occur either independently or in combination with the cane midge R. theobaldi (Weber and Entrop 2008). The high proportion of F. avenaceum found on diseased raspberry canes, especially in August and October in the present study, suggests that the observation of Weber and Entrop (2008) may hold true for eastern Germany as well.…”

“…The infection may be associated with ''midge blight'' caused by the cane midge Resseliella theobaldi. However, this might not necessarily be the case (Williamson and Hargreaves 1979;Weber and Entrop 2008). Hence, we will generalize the disease complex as 'cane disease' throughout this manuscript without further specification.…”

“…This includes the identification of the primary causal pathogens in different areas in Germany. Until now, only northern Germany has been assessed (Weber and Entrop 2008). Moreover, artificial inoculation experiments for evaluating the resistance or susceptibility of germplasm have not been established.…”

“…This phenomenon is the result of multiple factors, including high production costs, increased labor costs and an increase in the occurrence of several plant diseases, including black root rot, the spread of fungicide-resistant Botrytis strains and cane diseases (Graham et al 2011;Rupp et al 2016). Raspberry cane disease is caused by various phytopathogenic fungi, including Fusarium avenaceum (Fusarium wilt), Didymella applanata (spur blight), Leptosphaeria coniothyrium (cane blight) and Botrytis cinerea (cane Botrytis) with F. avenaceum being the major cause of cane diseases in Northern Germany (Williamson and Hargreaves 1979;Weber and Entrop 2008). First pink to orange colored spore bearing structures on dark brown lesions which are clear indications of infections of young raspberry primocanes with F. avenaceum can be found at the end of May beginning of June at earliest depending on the year and weather conditions (Weber and Entrop 2008).…”

“…Raspberry cane disease is caused by various phytopathogenic fungi, including Fusarium avenaceum (Fusarium wilt), Didymella applanata (spur blight), Leptosphaeria coniothyrium (cane blight) and Botrytis cinerea (cane Botrytis) with F. avenaceum being the major cause of cane diseases in Northern Germany (Williamson and Hargreaves 1979;Weber and Entrop 2008). First pink to orange colored spore bearing structures on dark brown lesions which are clear indications of infections of young raspberry primocanes with F. avenaceum can be found at the end of May beginning of June at earliest depending on the year and weather conditions (Weber and Entrop 2008). Afterwards disease symptoms are progressing until the end of August, beginning of September.…”