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Characterization of pv. Bacteriophages against Bacterial Walnut Blight and Field Evaluation. | LitMetric

pv. (hereafter ) is the etiological agent of walnut blight, the most important bacterial disease affecting walnut production worldwide. Currently, the disease is treated mainly with copper-derived compounds (e.g., CuSO) despite the evidence of genetic resistance in these strains. Regarding the effectiveness and sustainability, the use of a bacteriophage appears to be a biocontrol alternative to reduce load and symptomatology of walnut blight. Here, the phages 20-Xaj, 29-Xaj, and 30-Xaj were characterized, and their effectiveness in walnut orchards against walnut blight was determined. These bacteriophages showed a specific lytic infection in strains isolated from Chile and France. Phylogenetic analysis of the complete genome of 20-Xaj and 30-Xaj indicates that these phages belong to the genus. In the field, the cocktail of these bacteriophages showed similar effectivity to CuSO in the reduction of incidence and severity in walnut tissue. Moreover, the bacterial load of was significantly reduced in the presence of bacteriophages in contrast to a CuSO treatment. These results show that the use of bacteriophages can be an alternative to combat the symptoms of walnut blight caused by .

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9325289PMC
http://dx.doi.org/10.3390/v14071380DOI Listing

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