Virulence of Novel (Phylotype I) Strains from Rose, Blueberry, and Mandevilla on Seed Potato.

Potato ( L.) ranks fourth among the most important staple food in the world. (phylotype [phy] IIB, sequevar [seq] 1 and 2), also known as R3B2, the causal agent of brown rot disease on potato, is extremely damaging, causing great economical losses to potato in temperate regions.

Presence of (Phylotype I) in Aquatic Environments in the Netherlands.

, a European Union quarantine organism, was until recently absent in the aquatic environments and outdoor cultivation systems of the region. This bacterium was only sporadically reported in restricted greenhouse cultivation systems in some EU countries. In this paper, we report the first findings of (phylotype I) in surface water in two distinct geographic locations in the Netherlands in 2020.

Patterns of inter- and intrasubspecific homologous recombination inform eco-evolutionary dynamics of Xylella fastidiosa.

High rates of homologous recombination (HR) in the bacterial plant pathogen Xylella fastidiosa have been previously detected. This study aimed to determine the extent and explore the ecological significance of HR in the genomes of recombinants experimentally generated by natural transformation and wild-type isolates. Both sets of strains displayed widespread HR and similar average size of recombined fragments consisting of random events (2-10 kb) of inter- and intrasubspecific recombination.

Phylogenetic Assignment of Ralstonia pseudosolanacearum (Ralstonia solanacearum Phylotype I) Isolated from Rosa spp.

During the last two years, greenhouse cultivation of rose (Rosa spp.) in the Netherlands has been challenged by an uncommon bacterial disease. Affected plants suffered from chlorosis, stunting, wilting, and necrosis.

Assessing the Pathogenic Ability of ( Phylotype I) from Ornamental spp. Plants.

( phylotype I) isolates found in stunted, yellowing, and wilted ornamental rose ( spp.) were assessed for their pathogenic ability in two rose cultivars (cv. "Armando" and cv.