Forest Pathology (2019) 49 (4 - e12527)

Nilmara P. Caires, Pollyane S. Hermenegildo, Lúcio M.S. Guimarães, Reginaldo G. Mafia, Edival Â.V. Zauza, Norton Borges Júnior, Jorge L. Badel and Acelino C. Alfenas (2019)
Host range of Erwinia psidii and genetic resistance of Eucalyptus and Corymbia species to this pathogen
Forest Pathology 49 (4 - e12527)
Abstract: Dieback caused by Erwinia psidii is currently one of the most important emerging diseases in eucalypt plantations in Brazil. However, little is known in terms of the host range of this pathogen or the potential sources of resistance against the disease it causes. In this study, we inoculated plants of species from nine families to gain insight into the host range of E. psidii. Plants of all inoculated species of Myrtaceae except Acca sellowiana exhibited disease symptoms and therefore represent potential hosts for the pathogen under natural conditions. In addition, the response of four Corymbia species, 29 Eucalyptus species and three interspecific Eucalyptus hybrids to inoculation with E. psidii was evaluated. All Corymbia henryi, Corymbia maculata, Eucalyptus thozetiana, Eucalyptus cloeziana, Eucalyptus viminalis, Eucalyptus dalrympleana and Eucalyptus pilularis plants were highly resistant to the pathogen, whereas differential disease resistance was observed in the other species. This study provides important information on sources of resistance to Erwinia psidii with potential use in the development of clones with enhanced resistance in eucalypt species of economic importance.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Acelino C. Alfenas

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
resistance/tolerance/defence of host

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Erwinia psidii	Eucalypt (Eucalyptus)
	Erwinia psidii	Corymbia (crop)