Abstract
Valsa canker is a destructive disease on apple that causes serious economic losses in eastern Asia. In the present study fungal isolates from cankered apple and pear bark were examined and compared with morphology and rDNA-ITS sequences. Valsa mali was confirmed to be an independent species and a causal pathogen of Valsa canker on apple and pear in China. It was the predominant species (96.7% of isolates) on apple and was complemented by V. malicola (3.3% of isolates). Significant intraspecific genetic differentiation was detected in V. mali with two varieties recognized, V. mali var. mali occurring exclusively on apple and V. mali var. pyri occurring on both apple and pear. Results from genetic analysis and cross-inoculation tests provided support for the hypothesis that host preference probably catalyzed such genetic changes within the pathogen populations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
