title: Calonectria species associated with cutting rot of Eucalyptus.
abstract: Decline in the productivity of Eucalyptus hybrid cutting production in the Guangdong Province of China is linked to cutting rot associated with several Calonectria spp. The aim of this study was to identify these fungi using morphological and DNA sequence comparisons. Two previously undescribed Calonectria spp., Ca. pseudoreteaudii sp. nov. and Ca. cerciana sp. nov. were identified together with Ca. pauciramosa. Calonectria pseudoreteaudii resides in the Ca. reteaudii complex and Ca. cerciana is closely related to Ca. morganii. Connected to the discovery of Ca. pseudoreteaudii, species in the Ca. reteaudii complex were re-considered and the group is shown to accommodate two cryptic species. These originate from Australia and are described as Ca. queenslandica sp. nov. and Ca. terrae-reginae sp. nov.
authors.affiliation: Department of Microbiology and Plant Pathology, Tree Protection Cooperative Programme, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0002, South Africa;
authors.forename: L
authors.initials: L
authors.lastname: Lombard
authors.forename: X D
authors.initials: XD
authors.lastname: Zhou
authors.forename: P W
authors.initials: PW
authors.lastname: Crous
authors.forename: B D
authors.initials: BD
authors.lastname: Wingfield
authors.forename: M J
authors.initials: MJ
authors.lastname: Wingfield