A Potent Burkholderia Endophyte against Boxwood Blight Caused by Calonectria pseudonaviculata.

ABSTRACT: Calonectria pseudonaviculata (Cps) poses an increasing threat to boxwood, a major nursery crop and iconic landscape plant worldwide. Here, we report on a potent biocontrol agent that produces small sage green (SSG) colonies on potato dextrose agar. SSG is a bacterial strain recovered from Justin Brouwers boxwood leaves with unusual response to Cps inoculation. Water-soaked symptoms developed on leaves 2 days after inoculation then disappeared a few days later. This endophyte affected several major steps of the boxwood blight disease cycle. SSG at 10⁷ cfu/mL lysed all conidia in mixed broth culture. SSG at 10⁸ cfu/mL reduced blight incidence by >98% when applied one day before or 3 h after boxwood were inoculated with Cps. Its control effica

SUBMITTER: Kong P 

PROVIDER: S-EPMC7074863 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature