A new species of Calonectria causing leaf blight and cutting rot of three forest tree species in Brazil

R.F. Alfenas, O.L. Pereira, V.L. Jorge, P.W. Crous, C.A. Alfenas

Research output: Contribution to journalArticleAcademicpeer-review

13 Citations (Scopus)

Abstract

Several species of Calonectria cause diseases on a wide range of forest tree species that are propagated either via seedlings or rooted cuttings. In nurseries these fungi cause damping-off, cutting and root rots, stem lesions, and leaf blights. Recently a Calonectria sp. was isolated from rooted cuttings of Anadenanthera peregrina (Fabaceae), Piptadenia gonoacantha (Fabaceae), and Azadirachta indica (Meliaceae) exhibiting leaf blight and cutting rot in a forest nursery at the Universidade Federal de Viçosa, Brazil. Morphological comparisons and DNA sequences of three loci containing partial gene sequences of ß-tubulin (TUB2), calmodulin (CAL), and elongation factor (TEF-1a) indicated that these isolates represent an unnamed species of Calonectria, described here as C. hodgesii sp. nov. Sprayinoculated plants of all three hosts with a suspension at 1x104 conidia mL-1 induced leaf lesions, cutting rot, and intense defoliation as observed under natural conditions. Calonectria hodgesii was re-isolated from infected tissue, which fulfilled Koch's postulates and confirmed its status as a pathogen with a wide host range.
Original languageEnglish
Pages (from-to)513-521
JournalTropical Plant Pathology
Volume38
Issue number6
DOIs
Publication statusPublished - 2013

Keywords

  • cylindrocladium
  • likelihood
  • morphology
  • eucalyptus
  • disease

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