Downy mildew of lavender caused by Peronospora belbahrii in Israel

  • Peronospora belbahrii is one of the most destructive downy mildew diseases that has emerged throughout the past two decades. Due to the lack of quarantine regulations and its possible seed-borne nature, it has spread globally and is now present in most areas in which basil is produced. While most obligate biotrophic, plant parasitic oomycetes are highly host-specific, there are a few that have a wider host range, e.g. Albugo candida, Bremia tulasnei, and Pseudoperonospora cubensis. Recently, it was shown that Peronospora belbahrii is able to infect Rosmarinus, Nepetia, and Micromeria in Israel in cross-infection trials, hinting an extended host range for also this pathogen. In this study, a newly occurring downy mildew pathogen on lavender was investigated with respect to its morphology and phylogeny, and it is shown that it belongs to Peronospora belbahrii as well. Thus, it seems that Peronospora belbahrii is currently extending its host range to additional members of the tribe Mentheae and Ocimeae. Therefore, it seems advisable to scrutinise all commonly used members of these tribes in order to avoid further spread of virulent genotypes.
Author:Marco Thines, Anthony Tumenez Buaya, Sebastian Ploch, Yariv Ben Naim, Yigal Cohen
Parent Title (English):Mycological progress
Place of publication:Berlin ; Heidelberg
Document Type:Article
Date of Publication (online):2020/12/05
Date of first Publication:2020/12/05
Publishing Institution:Universit├Ątsbibliothek Johann Christian Senckenberg
Release Date:2022/06/07
Tag:Downy mildew; Evolution; Host jump; New host; Peronosporaceae
Page Number:7
First Page:1537
Last Page:1543
Open Access funding enabled and organized by Projekt DEAL. MT is supported by LOEWE in the framework of the Centre for Translational Biodiversity Genomics. YC is supported by The Plant Council of Israel.
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie
Licence (German):License LogoCreative Commons - Namensnennung 4.0